Abstract
Al2O3 fiber reinforced Ni3Al composites were fabricated by vacuum hot pressing the mixtures of nickel, aluminium, boron powder and Al2O3 fiber. The high temperature tensile properties of the composites were discussed in connection with the microstructure.
The main results obtained were summarized as follows:
(1) The Al2O3/Ni3Al composites displayed no evidence of chemical reaction at the interface and it was considered that they had intimate relationship between Ni3Al matrix and Al2O3 fiber.
(2) The yield stress of the composites increased with increasing temperature up to about 800K.
(3) The effect of Al2O3 fiber on the strength of the composites was obscure, because Al2O3 fibers were randomly oriented and pores existed within the cluster of Al2O3 fibers.
