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.

Report Date:

1987-05-29

Pagination or Media Count:

17.0

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 SEMEDXS. 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 Conditioning, Heating, Lighting and Ventilating
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE