Accession Number : AD0803450

Title :   DEVELOPMENT OF MANUFACTURING METHODS FOR THE PRODUCTION OF INFILTRATED TUNGSTEN COMPOSITE ROCKET NOZZLE INSERTS.

Descriptive Note : Final technical rept. 1 Sep 64-31 Jul 66,

Corporate Author : AVCO MISSILES SPACE AND ELECTRONICS GROUP WILMINGTON MA AVCO SPACE SYSTEMS DI V

Personal Author(s) : Sturiale, T. ; Smith, J. T. ; Cannon, R.

Report Date : DEC 1966

Pagination or Media Count : 165

Abstract : This final report summarizes results obtained during a program which was initiated under Contract AF33(615(-2090 on 1 September 1964, and successfully completed by the Space Systems Division, Avco Corporation on 31 July 1966. Manufacturing methods were developed for producing infiltrated tungsten composite materials having uniform microstructures and controlled grain sizes, pore sizes and pore size distribution for use as rocket nozzle insert materials. An ultrasonic sound velocity measurement technique was developed to non-destructively monitor billet fabrication and insure a homogeneous product. Preliminary screening was conducted by subjecting infiltrated tungsten specimens to high enthalpy air plasma environments and analyzing thermal response data and erosion behavior. Selected tungsten matrix and infiltrant combinations were fabricated into operational sized rocket nozzle inserts and test fired at the Rocket Propulsion Laboratory, Edwards Air Force Base. Simultated rocket motor firings were conducted using both 5700 F and 6500 F solid propellants. Subsequent evaluation indicated that zinc infiltrated tungsten materials hold promise for use as rocket nozzle inserts up to 6500 F. (Author)

Descriptors :   *HEAT RESISTANT MATERIALS), (*NOZZLE INSERTS, (*POROUS METALS, IMPREGNATION), TUNGSTEN, EROSION, THERMAL SHOCK, OXIDATION, THERMAL STABILITY, DENSITY, POROSITY, ZINC, MAGNESIUM, SOLID ROCKET PROPELLANTS, FAILURE(MECHANICS), REFRACTORY METALS, ROCKET NOZZLES, POWDER METALS, MICROSTRUCTURE, COMPOSITE MATERIALS, TIN.

Subject Categories : Laminates and Composite Materials
      Properties of Metals and Alloys
      Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE