摘要：

Continuous-fiber reinforced metal-matrix composites consisting of Ni{sub 3}Al alloys and Saphikon Al{sub 2}O{sub 3} single crystal fibers were fabricated by hot-pressing of fiber-foil lay-ups. Two matrix compositions were employed, namely, IC50 (Ni--22.5Al--0.5Zr--0.1B, at. %) and IC396M (Ni--15.9Al--8.0Cr--0.5Zr--1.7Mo--0.02B, at. %). Etching of the foils in aqueous FeCl{sub 3} solution prior to lay-up and hot-pressing tended to improve fiber-matrix bonding and the density-normalized room temperature yield stress. Whereas strength improvements for the IC50 matrix were only moderate, significant improvements were found for a IC396M composite reinforced with 10 vol. % of Saphikon fibers.

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