Accession Number : AD0489423

Title :   BORON FIBER METAL MATRIX COMPOSITES BY PLASMA SPRAYING.

Descriptive Note : Final technical rept. 15 Aug 65-15 May 66,

Corporate Author : UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CT

Personal Author(s) : Kreider, Kenneth G. ; Leverant, Gerald R.

Report Date : JUL 1966

Pagination or Media Count : 68

Abstract : Aluminum reinforced by up to 60 volume per cent boron fiber has been fabricated in the form of flat panels by a plasma spray technique. This material exhibited strengths in excess of 130,000 psi at room temperature and 100,000 psi at 500 C in the direction of fiber orientation and less than 10,000 psi in the transverse direction. A modulus of 34 x 10 to the 6th power psi was measured for aluminum containing 50 v/o boron fiber. 2024 Al alloy containing 41 v/o boron fiber was found to exhibit an apparent endurance limit at 10 to the 7th power cycles of 70,000 psi. Boron-aluminum has been shown to have excellent creep resistance and exhibit a 100 hr rupture life above 30,000 psi at 400 C and above 50,000 psi at 300 C. It was found that boron-titanium composites could not be fabricated without degradation of the fiber. Nickel plating the fiber eliminated this situation; however, reaction with the nickel was found to be deleterious. (Author)

Descriptors :   *COMPOSITE MATERIALS), (*ALUMINUM ALLOYS, (*BORON, FIBERS), (*PLASMA JETS, SPRAYS), COATINGS, NICKEL, TITANIUM ALLOYS, TENSILE PROPERTIES, CREEP, FATIGUE(MECHANICS).

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE