Accession Number : AD0803905

Title :   A COMPATIBILITY STUDY OF SIC AND B FIBERS IN BE, FE, CO, AND NI MATRICES.

Descriptive Note : Rept. for Feb-Aug 66,

Corporate Author : AEROSPACE CORP EL SEGUNDO CA LABS DIV

Personal Author(s) : Schneidmiller, Richard R. ; White, Jerry E.

Report Date : OCT 1966

Pagination or Media Count : 33

Abstract : This report describes a study of the compatibility and interaction characteristics of SiC and B fibers with metal matrices in composites prepared from powder metallurgy by hot pressing. This study was designed to determine for each metal-fiber combination the hot pressing temperature that will produce the best combination of integrity and compatibility for a particular composite. The interaction of the fibers and metal matrices after a variety of exposure conditions was studied by optical and electron microscopy, microhardness, and electron microprobe analysis. Observations indicated that the boron fibers react extensively with all of the metals except Be at temperatures above 700 C. In the case of Be relatively little reaction was observed even at 1000 C. In general, SiC is stable to temperatures about 100 to 150 C higher than is B in the Fe, Ni, and Co matrices. The situation is reversed in a Be matrix, where B is more stable than SiC. The tendency toward instability is greatest for Ni, while Co, Fe, and Be exhibit progressively greater resistance toward interaction with both B or SiC fibers. (Author)

Descriptors :   *CARBIDES), (*SYNTHETIC FIBERS, COMPATIBILITY), (*BORON, SYNTHETIC FIBERS), (*SILICON COMPOUNDS, COMPOSITE MATERIALS, HOT PRESSING, ELECTRON MICROSCOPY, HARDNESS, POWDER METALLURGY.

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE