Accession Number : ADA193101

Title :   Analysis of Debris from Accelerated Life Test of the Hughes Five-Year Vuilleumier Cryocooler.

Descriptive Note : Aerospace rept.,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA MATERIALS SCIENCES LAB

Personal Author(s) : Cranmer, D C ; Watts, E J

PDF Url : ADA193101

Report Date : 29 May 1987

Pagination or Media Count : 17

Abstract : 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 collected from the second and third stages only. The debris has been identified by an investigative analysis using the analytical techniques of X-ray diffraction, IMMA, and SEM/EDXS. Most of the particulates contain a combination of Iron, Chromium, and Nickel or Molybdenum Niobium compounds.

Descriptors :   *DEBRIS, *SAMPLING, *REFRIGERATION SYSTEMS, ACCELERATED TESTING, CHROMIUM, CRYOGENICS, IRON, LIFE TESTS, MOLYBDENUM COMPOUNDS, NICKEL, NIOBIUM COMPOUNDS, PARTICULATES, VELOCITY, X RAY DIFFRACTION, VUILLEUMIER CYCLE

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE