... ACCELERATED LIFE TESTING OF METALLIC RECTIFIERS ... FACTORS AFFECTING LIFE CHARACTERISTICS CF METALLIC RECTIFIERS ...
DTIC Science & Technology
... Page 2. CATHODIC DELAMINATION ACCELERATED LIFE TEST METHOD ... a 1:est for cathodic delamination of such materials in water. ...
... Accession Number : AD0014184. Title : ACCELERATED LIFE TESTING OF METALLIC RECTIFIERS. Descriptive Note : Quarterly rept. no. ...
... Title : ACCELERATED LIFE TESTING EFFECTS ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : Report Date : JUL 1977. ...
... ADD873178. Title : ACCELERATED LIFE TESTING EFFECT ON CMOS MICROCIRCUIT CHARACTERISTICS. Corporate Author : ...
... REPORTS, EFFICIENCY, HIGH PRESSURE ... SUBMARINES, ACCELERATED TESTING, DECOMPRESSION ... ENGINEERING LIFE SUPPORT ...
... Accession Number : AD0748252. Title : Temperature and Temperature Gradients for Accelerated Life Tests of Nickel-Cadmium Cells. ...
... Descriptors : *AGING(MATERIALS), *SEMICONDUCTOR DEVICES, *ACCELERATED TESTING, LIFE EXPECTANCY(SERVICE LIFE), COST ...
... LIFE), HAZARDS, HIGH TEMPERATURE ... ENVIRONMENTAL TESTS, LIFE CYCLES ... STORAGE, AUSTRALIA, ACCELERATED TESTING, THERMAL ...
reasonable amount of time, an accelerated life test at high temperatures is used . This type of accelerated test is based on the observation that ...
NASA Website
... TECHNIQUES FOR MICROCIRCUITS - EVALUATION OF HIGH TEMPERATURE (473K - 573K) ACCELERATED LIFE TEST TECHNIQUES ...
For an accelerated life test, let V sub 1,...,V sub k denote k fixed accelerated stresses and let V sub 0 be the normal stress. It is assumed that the probability distributions corresponding to the accelerated stresses differ from the nonaccelerated life ...
National Technical Information Service (NTIS)
... PHYSICAL PROPERTIES, HIGH TEMPERATURE, FABRICATION ... DATA ACQUISITION, TUNING, LIFE TESTS, ACCELERATED TESTING. ...
... DEGRADATION, WEAR, LIFE TESTS, COMMUNICATION SATELLITES, ACCELERATED TESTING, LUBRICATION, ANTENNA COMPONENTS. ...
... Descriptors : *ANTIFREEZES, *COOLANTS, *CORROSION INHIBITION, *BENCH TESTS, ELECTRODES, LIFE EXPECTANCY(SERVICE LIFE ...
... ASSURANCE, *WAFERS, *ACCELERATED TESTING, TEST AND ... SEMICONDUCTORS, HIGH ENERGY ... OXIDES, VENDORS, LIFE TESTS, IONIC ...
... AGING(MATERIALS), HIGH TEMPERATURE ... THERMAL CYCLING TESTS, ACCELERATED TESTING, THERMAL ... SHELF LIFE, FOAM, GEL ...
Jun 16, 2011 ... Keywords: Accelerated life testing, service life, performance standards, wood preservatives, deterioration, biodegradation, fungicides, ...
Treesearch
Accelerated Life Structural Benchmark Testing for a .... Martin, Infinia Corporation, and NASA Glenn Research Center are developing a high-efficiency, 110 W ...
CMOS MICROCIRCUIT CHARACTERISTICS. Phase II Report. Interim. January 1977 to July 1977. (NASACdi-150381). ACCELERATED LIFE TESTING. N77-31406 ...
... Accession Number : ADA063841. Title : A New Approach to Inference from Accelerated Life Tests. Descriptive Note : Technical rept. ...
... the service life of two ... data obtained at high temperatures and ... MATERIALS), DEGRADATION, ACCELERATED TESTING, HUMIDITY, REACTION ...
... Abstract : The results of a matrix of high-temperature accelerated life tests, 125C life tests, and 250 hour 250C lot acceptance tests were evaluated ...
Accelerated life testing of a product under more severe than normal conditions is commonly used to reduce test time and costs. Data collected at such accelerated conditions are used to obtain estimates of the parameters of a stress translation function. T...
The report, in two volumes, is devoted to an investigation into the state-of-the-art of methods for reducing the time and expense associated with life testing, particularly as it relates to parts. The areas investigated are divided into accelerated testin...
A literature review and manufacturers survey was conducted to identify the status of accelerated testing and published information pertinent to battery life. The principles of accelerated testing are reviewed with reference to lead-acid batteries. Preliminary experimental designs for ...
NASA Astrophysics Data System (ADS)
Environment, static acceleration, vibration, shock, gas contamination, and life tests in development
NASA Technical Reports Server (NTRS)
... Title : NMOS VOLTAGE BREAKDOWN CHARACTERISTICS COMPARED WITH ACCELERATED LIFE TESTS AND FIELD USE DATA. ...
Jan 23, 2001 ... Mechanical tests with no local package heating will significantly overestimate the life of solder joints. Local heating will accelerate life ...
testing is used extensively to achieve a high confidence of hardware life. 2. Accelerated Life Testing is a limited method to predict future ...
... Title : THE PREDICTION OF SHELF-STORAGE LIFE IN RUBBERS FROM ACCELERATED HEAT AGEING TESTS. PART ...
In this paper we propose a model for accelerated life testing which differs from those considered in the past. The author's model does not require thd usual assumptions about the failure distributions and the acceleration functions. The author's approach ...
The Facility for Accelerated Service Testing (FAST), located at the Transportation Test Center near Pueblo, Colorado, is a joint government/industry program for accelerated life cycle testing of railroad track and mechanical components. The facility consi...
HALT Highly Accelerated Life Test. HAST Highly Accelerated Stress Testing. HBT Heterojunction Bipolar Transistor. RT Room Temperature ...
Project is based on a modified Highly Accelerated Life Test (HALT), a process in which products are subjected to accelerated environments to ...
Accelerated life testing (ALT) is performed by testing specimens under more severe conditions than encountered during normal operational conditions. That is, more severe values of stressors such as pressure, temperature, etc., are used. Based on the test ...
... for a pulse transformer as is required by a high-power quasi ... reliability testing, the pulsed character is useful in that accelerated life testing is feasible ...
... Descriptors : *Army research, *Applied mathematics, *Model theory, *Reliability, *Life tests, Operations research, Accelerated testing, Bayes ...
... TESTED IN AN ACCELERATED HIGH VELOCITY, HOT ... ANY OTHER MATERIAL TESTED INCLUDING THE ... SHOULD NOT LIMIT LIFE (AT LEAST ...
Mechanical tests with no local package heating will signicantly overestimate the life of solder joints. Local heating will ...
We present a new approach for inference from accelerated life tests. Our approach formulates such problems as inference under Kalman filter models with correlated observation errors. We restrict attention to exponential life distributions, and the power r...
This is a partly philosophical discussion of the problems of conducting accelerated life tests experiments and analyzing data from such experiments. The objective is to predict life at a specified stress level or radiation dose. The concept of information is presented, and its quantification via entropy is ...
Energy Citations Database
The development of new composite materials, which lack the historical field data base, has led to the need for an accelerated life testing method applicable to composites. Accelerated life testing by increasing the sustained stress levels requires the mod...
Long term tests to 30,000 hours were continuted to provide correlation data for accelerated test results. A theory of life governing processes for electronic parts is given. The data are analyzed and presented to provide estimates of the life governing pr...
... EXPECTANCY(SERVICE LIFE), *DEGRADATION, MILITARY ... RANGE(TIME), HIGH STRENGTH, ACCELERATED TESTING, ROOFS. ...
... observed from available accelerated GEO tests ... particularly at high operating DOD ... REGRESSION ANALYSIS, LIFE TESTS, ELECTRIC CHARGE. ...
Mechanical tests with no local package heating will significantly overestimate the life of solder joints. Local heating will accelerate life testing and ...
(DPA), Highly Accelerated Life Test (HALT) and. Dielectric Voltage Breakdown Strength. The data analysis included a comparison of the 2000-hour life test ...
... FATIGUE LIFE OF LEADS AND SOLDER ... DURING HIGH-LEVEL TESTING IS POSSIBLE ... THE EXPONENT FOR COPPER LEAD-WIRE FAILURES ...
Batteries for solar photovoltaic applications and other terrestrial applications require long life in daily cycling regimes. There is a need to develop testing procedures to accelerate aging of electrochemical cells so that cycle life data can be acquired in less time than real time testing ...
... high temperature operational life test (HTOL), and highly accelerated stress test ... Considering extensive testing and screening of systems for space ...
amount of time, an accelerated life test at either high temperature or other acceleration factor is used. In general, the high temperature condition is used ...
... Accession Number : ADA263265. Title : Composite Unit Accelerated Life Test of the High Gain Array. Descriptive Note : Final rept. Jul-Nov 92,. ...
The report describes results of some research in accelerated life testing and related topics. The report is divided into seven sections, each section dealing with a particular category of the research. Each section contains bibliographic citations of pape...
Least squares estimators of the parameters of the generalized Eyring Model are obtained using data from censored life tests conducted at several accelerated environments. These estimators are obtained after establishing that the Gauss-Markov conditions fo...
Least squares estimators of the parameters of the generalized Eyring Model are obtained by using data from censored life tests conducted at several accelerated environments. These estimators are obtained after establishing that the Gauss-Markov conditions...
... AD-A263 265 COMPOSIT UNIT ACCELERATED LIFE TEST OF THE HIGH GAIN ARRAY Contract Number N00014-93-C-2021 January 28, 1992 ...
A process was developed for the accelerated life testing of a particular cell or battery which comprises the comparison and extrapolation of the end of discharge voltages plotted versus the logarithm of the cycle number in combination with prior knowledge...
Verifying the reliability of engines for prolonged service life by conducting protracted tests for a given service life does not assure rapid rates of growth of service life. To accelerate the rate of growth of service life and check on the capabilities o...
... Each of the components is assumed to have an independent Weibull time to ... A general model is used for the scale parameter which includes the ...
... and interpreted give highly satisfactory ... EXPECTANCY(SERVICE LIFE), POLYMERS ... RADIATION, PLASTICS, ACCELERATED TESTING, HUMIDITY ...
... clamps and compared to a standard non-clamped polyurethane connector in accelerated life testing. It was determined that a mechanical clamp ...
... Pagination or Media Count : 202. ... DEPOSITION, SPUTTERING, PRODUCTION, TANTALUM COMPOUNDS, OXIDES, GOLD, METAL COATINGS ...
governing variables to achieve high reliability in the Stirling Radioisotope ..... approach would be to perform accelerated life testing at elevated ...
... ACTIVATION ENERGY AND TIME, ACCELERATED-LIFE TESTS ACCURATELY DETERMINE THE INFANT-MORTALITY RATE OF PLASTIC ...
The CET for the lead-free solder project is based on a modified Highly Accelerated Life. Test (HALT), a process in which products are subjected to ...
... and stimulation of ideas. ... This experiment was devised because large carbonate con- S centrations had frequently been found to be associated with ...
... Descriptors : *SOLAR CELLS, *PHOTOVOLTAIC EFFECT, *SOLAR PANELS, ULTRAVIOLET RADIATION, CORROSION, LIFE EXPECTANCY ...
... OF CONTACT LIFETIME ON TEMPERATURE FOR THIN FILM W CONTACTS SPUTTER DEPOSITED ONTO SI-CE THERMOPILES WITH A ...
... Salt spray ... acceleration test be developed so that the useful life of a ... surface with oxygen. The corrosion resistance of stainless steels I Page 7. ...
-55�C to 300�C. The ability to test large sample populations in parallel reduces the ...... ASI can assist in developing a test plan, characterizing the ...
... containers; Packaging; Plastics; Logistics; Lifetime prediction models; Accelerated testing; Arrhenius relationships test development; Service life ...
array bar that combined with the relatively high current requirements ... Test Unit (ETU) had been constructed and tested, and accelerated life tests were ...
Four alternate screening methods will be discussed in this paper: Highly accelerated life test (HALT), forward voltage drop tests for evaluating wire- bond ...
A solar array drive mechanism, was subjected to an accelerated life test under vacuum. The accelerated life test involved operating the mechanism at increased speed sufficient to accrue the equivalent of 10 years normal speed running (1 revolution of the ...
Some of the important aspects of accelerated-stress life testing such as extrapolation distance and sample size determination are considered. Also addressed are the advantages of applying more than one accelerated stress to induce failure. A frequent problem in applied research and development is the determination ...
... the grant is the development of methods ... Accelerated life testing; Reliability growth models; Inference ... life of gun barrels; Competing risk theory. (kr). ...
... Allowable acceleration normal to axis 12 g ... PARAMETER (OF) SAMPLES SE HIGH LOW ... annually to attempt further extension of the shelf life of this ...
... by the end of their expected performance life ... of membrane- type fore- vacuum pump of ... required computed partial pressure values, the admixture ...
Jun 16, 2011 ... Keywords: Service life, accelerated life testing, sealing compounds, deterioration, ... US Forest Service - Research & Development ...
... of transducers to provide experimental methods for early discovery of problems that would detrimentally affect their reliability and useful life cycle. ...
The Combined Environments Test (CET) was based on a modified Highly Accelerated Life Test. (HALT), a process in which products are subjected to accelerated ...
The application of high temperature accelerated test techniques was shown to be an effective method of microcircuit defect screening. Comprehensive microcircuit evaluations and a series of high temperature (473 K to 573 K) life tests demonstrated that a f...
The tool life of several commercial C-2 grade cutting tools used in machining titanium was estimated using two experimental techniques, the quick facing test and the multipass facing test. Comparisons among the tools tested were made statistically by anal...
Testing? " Based on modified Highly Accelerated Life Test (HALT). Goal: Quickly break products and learn from the failure modes ...
highly efficient current collection s ystem wits devised for the cell. ...... accelerated life tests: test procedures, usually conducted at ...
When the reliability of capacitors is evaluated, a highly accelerated life test (HALT) is usually adopted since it is a time-efficient method of determining ...
Jun 16, 2011 ... Keywords: Stainless steel, steel, zinc, polarisation, accelerated life testing, direct electric currents, coatings, deterioration, ...
May 1, 2007 ... Highly accelerated life testing (HALT) can be used to increase robustness; particularly for electronics parts and assemblies exposed to ...
Sep 1, 1971 ... Subject Terms: DATA PROCESSING; DESTRUCTIVE TESTS; ELECTRIC BATTERIES; ELECTRIC POTENTIAL; ELECTROCHEMICAL CELLS; FAILURE MODES; ...
thermal testing, to project life for intended applications. Conclusions. These conclusions are based on results limited to assembly failure to 900 ...
... The test media may vary from actual service exposure to highly accelerated media. The correlation of laboratory data to service life in an actual ...
May 6, 2008 ... It is also highly desirable that the spaceflight system performance ... For test , this can include accelerated life testing, fleet leader ...
Based on Modified Highly Accelerated Life Test. (HALT). Benefits. ? Identify Design and Process Problems. ? Time Frame is Shorter and Faster ...
Jul 14, 2006 ... The Combined Environments Test (CET) was based on a modified Highly Accelerated Life Test. (HALT), a process in which products are subjected ...
The article presents the results of normal and accelerated corrosion tests of zinc and cadmium coatings obtained from cyanous, acid, and urotropin electrolytes. It suggests a classification of climate from the point of view of its effect on the corrosion of metallic materials. It demonstrates the possibility of predicting atmospheric corrosion and ...
The purpose of this program was to study, investigate and develop test and measurement techniques for controllably accelerating the aging processes in tantalum thin film R-C networks, and to investigate the physics of failure associated with the networks....
As a significant beginning in applying accelerated tests to solar arrays for life-prediction purposes, this study is directed toward (a) developing a plan for predicting the service life of a specific solar array in a specific geographic site - viz., the 25-KW flat-plate array installed near Mead, Nebraska, and (b) ...
... r where the sum !a over all rnm comparisons. To test the hypothesis H :X- Y 0 st ... Reliability test data from tests under overstress con- Testing ditions. ...
An analysis is made of the possibility of estimating reliably the service life of injection lasers from the results of accelerated tests carried out at elevated temperatures. An expression is obtained for the test acceleration coefficient under the following assumptions: the distribution of the ...
The thermal vacuum accelerated life test of a solar array unit qualification mechanism (MSDS 3) is described. Most of the test was conducted with the shaft of the mechanism rotating at one revolution per hour, which is 24 times normal speed. The test was ...
A step-stress test is an accelerated life test in which the stress on an unfailed item is allowed to increase at a preassigned time. Step-stress testing is considered here from a non-parametric point of view when the observations have been arbitrarily rig...
As a significant beginning in applying accelerated tests to solar arrays for life-prediction purposes, this study is directed toward (a) developing a plan for predicting the service life of a specific solar array in a specific geographic site - viz., the ...
highly elliptical orbit will have perihelion close to the Sun and aphelion at more than 5 AU. ..... degradation mechanisms and accelerated life testing. ...
Mr. Pickel has been actively involved in the study of nuclear and space radiation mechanisms and effects ..... This multilevel modeling approach has been ...
chronic mortality from raw acute toxicity data using accelerated life testing and linear regression analysis. Currently ORD is developing internet versions of ICE and ACE for use...
Science.gov Websites
... retardation and acceleration) in fatigue crack growth. ... Similar comparisons on high strength 4340 steel ... fatigue life of test specimens without flaws, it ...
... delta K and unconservative at high delta K. ... which crack acceleration and retardation occurred. ... factor of two of the test life, and were consistently ...
High temperature shape memory alloys;; Accelerated life prediction tools; ..... This includes both test techniques and subsystems that will make flight ...
High temperature shape memory alloys;; Accelerated life prediction tools; ... flame propagation, vitiated-test media and facility-contamination effects, ...
In current accelerated testing methods, typically the speeds, loads, or temperatures are increased in order to simulate a high cycle life in a short period ...
... press-to-test button on ... DETECTION, GRAVITY, HIGH ACCELERATION, HYBRID SYSTEMS ... PNEUMATIC EQUIPMENT LIFE SUPPORT SYSTEMS. ...
Although RF accelerated life testing of the RF devices would be optimal, it is quite ..... and compound semiconductor devices such as Gallium Nitride (GaN) FETs ...
OARS uses a high emissivity (>0.999) blackbody cavity with ... subjected to a full accelerated life test that was designed to ...
... Lived in Colorado all her life ... 5 months: begins an accelerated nursing program, ... High priority for TB control � lo ?burden and high? ...
Center for Biologics Evaluation and Research (CBER)
Neural Network Models of Simple Mechanical Systems Illustrating the Feasibility of Accelerated Life Testing AUTHOR(S): Steven P. Jones, Ralph Jansen, ...
wide range of environmental and accelerated life testing appropriate to the ..... s clearly of value for a PV-STF to be highly adaptable, allowing ...
physical characterization of bare and platinized supports; fuel cell construction; steady state and accelerated life testing; scale-up.
important Weibull parameters, highly accelerated life test data, and sample size issues. The goal of this research effort was to determine if any of the ...
... Abstract : Parameters of the Power Rule Model, and the shape parameter of the Weibull distribution are estimated using data from censored sample ...
... itself in the form of high resistance lines ... VI details the results of accelerated tests which compared ... realistic crossed thermal gradient with life-times of ...
greater by a need for high- to moderate-resolution data. ...... accelerated life test early, root out deploy mechanism problems on STARs ...
... temperature effects on avalanche breakdown in GaAs MESFETs to determine if this failure mechanism is accelerated by high temperature life tests. ...
... The results demonstrated the capability of the accelerated life test rig to provide high cycle rate and adequate flexure to fatigue the film samples. ...
Potential long-term degradation modes for the two types of modules in the Mead array were determined
... MIL-STD-883 Class B screening and accelerated life testing. The results showed that prestressing, even at the relatively high levels used, had no ...
... collected on experimental test day 1 ... MINIATURIZATION, HEART, HIGH ACCELERATION, RADIUS(MEASURE ... Subject Categories : LIFE SUPPORT ...
... were deposited using the high rate reactive ... Accelerated test results suggest the increases in RCF ... be obtainable on real-life components coated ...
High reliability in this context is limited to parts designed and fabricated ... though rooted in the results of destructive and accelerated life testing, ...
... Report Date : 29 MAY 1987. ... Most of the particulates contain a combination of Iron, Chromium, and Nickel or Molybdenum Niobium compounds. ...
... Colloid thrusters operate by electrostatically accelerating charged droplets ... capable of providing a high degree of ... Life tests of the ST7 thrusters have ...
Results from a comprehensive case study on accelerated life testing of some selective solar collector absorber coatings for DHW systems are reviewed. The study was conducted within Task X `Solar Materials Research and Development' of the IEA Solar Heating and Cooling Program from 1987 to 1992 and is unique due to its quantitative and ...
The highly accelerated voltage and current stress demonstrated that the diamond ... Accelerated life test. 500 hours, 2 W output, 40 oC �, Power, ...
Nov 17, 2008 ... on a modified Highly Accelerated Life Test (HALT), a process in which products are subjected to accelerated environments to find weak links ...
Potential long-term degradation modes for the two types of modules in the Mead array were determined and judgments were made as to those environmental stresses and combinations of stresses which accelerate the degradation of the power output. Hierarchical...
For the development of accelerated testing methodology to estimate the life time of electric cable, which is installed in radiation field such as a nuclear reactor containment vessel, radiation and thermal combined degradation of cable insulation and jack...
We review published literature from 1975 to the present for accelerated stress testing of flat-plate terrestrial photovoltaic (PV) modules. An important facet of this subject is the standard module test sequences that have been adopted by national and international standards organizations, especially those of the International ...
This report covers work that was to correlate wafer level test structure tests with life tests by utilizing test structures collocated with a RAM-like device. Wafer level tests for oxide breakdown, electromigration, and hot carrier degradation were conduc...
The tool life of several commercial C-2 grade cutting tools used in machining titanium was estimated using two experimental techniques, the quick facing test and the multipass facing test. Comparisons among the tools tested were made statistically by analyzing differences in regression equations derived from ...
NASA's highly reliable, low-cost liquid-applied coating offers ... als Science Laboratory and Beach Corrosion Test Site. Early ... Accelerated life tests, tests with chlorides to simulate contamination, and compound ...
Apr 21, 2009 ... Spur Gear Fatigue Test Rigs. ... Provides accelerated fatigue life testing for standard spur gears; Standard gears are 88.9 mm (3.5") pitch ...
The final Environmental Test (EMI)Electromagnetic Interference in Phase II - Confirmatory Samples was completed. The Accelerated Confirmatory Life Test (REL)Reliability(Testing) was continued through 1749 hours. The majority of the CRT assemblies did not ...
The objective of this study was to develop a grease endurance test method which can be utilized in the comprehensive test methodologies being developed for predicting the performance life of military grease under laboratory environment. In an initial stud...
Battelle conducted an independent review and analysis of the accelerated test procedures and test data obtained by Exide in the 3-year Phase I program to develop advanced lead-acid batteries for utility load leveling. Of special importance is the extensive data obtained in deep-discharge cycling tests on 60 cells ...
The results of performance tests with thick-accelerator-grid (TAG) ion optics are presented. TAG ion optics utilize a 50 percent thicker accelerator grid to double ion optics' service life. NSTAR ion optics were also tested to provide a baseline performan...
Electrical life is an important parameter to estimate the reliability of a relay, and it is greatly affected by load current. In order to shorten the time of life test, load current stress accelerated life tests were carried out by using a life ...
This investigation examines temperature effects on avalanche breakdown in GaAs MESFETs to determine if this failure mechanism is accelerated by high temperature life tests. The specific objective is to assess whether the accelerated life test evaluations ...
Unit S3 of the Hughes Vuilleumier (VM) Cryocooler Program has undergone accelerated life testing at twice the service speed expected in a normal unit. Debris samples were obtained from all areas of the cooler; samples of the regenerator balls were collect...
The present report documents the results of a joint study aimed at establishing the use and limitations of methods for accelerated life testing applicable to materials used in solar heating and cooling applications. The study was conducted as part of the ...
Accelerated testing of C67 Case Size 1 Monolythic capacitors of the improved version continues to demonstrate the long-life capability of this capacitor at use conditions. Procedures for selecting these long life capacitors were continued during this peri...
Research topics included shock and wear processes, optimal maintenance and replacement policies, positive dependence of components, life distribution properties of devices, analysis of censored failure time data, and accelerated life testing of systems.
Although light-emitting diodes (LEDs) have the potential for long life, LED luminaires may experience a much shorter life for the system as a whole because of the driver. Past studies show that the electrolytic capacitor used in switch-mode power supplies often has the shortest lifetime, and thus determines the electronic driver lifetime. This study ...
Functional acceleration and storage life test results of 70 low temperature aluminum Heat Pipes (HP) with acetone are presented. To provide long term tests at elevated temperature, thermostats on gas controlled HPs were developed ensuring that the required temperature was kept during the tests. ...
... a nEW PROcESS FOR THE ACCELERATION TEST AND EVALUATION OF AEROMEDICAL EQUIPMENT FOR ... acceleration Testing ...
As the life and reliability capabilities of cryocoolers have improved there has been a corresponding evolution of user requirements. Tactical applications routinely require operation in excess of 10,000 hours; space-borne applications require operational life of >10 years. Demonstration of these long lifetimes provides a substantial challenge. Previous ...
