Tensile Strength of C- or BN- coated SiC/TiAl Single Fiber Composites
1996
TiAl matrix composite materials are seen to have potential as heat-resistant materials, especially in the field of aeronautics and space. The goal of our study is to develop SiC based heat-resistant fibers / TiAl composite materials, using vapor phase deposition processing. Since the intermetallic compound TiAl as Ti alloys is chemically active, it is required an optimum control of the interfaces to form TiAl matrix composite materials for comparatively high temperature's application. The compatibility of the interfaces and the change in strength at normal temperature and at high temperatures have been studied by using SEM, EPMA and tensile testing. The composites have more improved strength with BN- coated or C-coated irradiation cured SiC and SiTiC fibers at 1073K.
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