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Effects of Processing on Fiber/Matrix Interfaces in Ni3Al/Sapphire Single Crystal Composites

Published online by Cambridge University Press:  15 February 2011

D. Ringer  and
C. L. White
D. Ringer
Affiliation:
Michigan Technological University, Department of Metallurgical and Materials Engineering, Houghton, MI 49931-1295, USA
C. L. White
Affiliation:
Michigan Technological University, Department of Metallurgical and Materials Engineering, Houghton, MI 49931-1295, USA
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Abstract

Composites consisting of Ni3Al modified with Zr, Fe, and B (IC-50) reinforced with continuous sapphire single crystal fibers have been prepared by vacuum hot pressing foil/fiber multilayers. Previous research detected formation of Zr-rich precipitates and sulfur segregation at fiber/matrix interfaces in these materials subsequent to fabrication. In this work, fiber bonding to the Ni3Al matrix has been characterized using fiber push-out tests. Segregation and precipitation at fiber/matrix interfaces has been examined using scanning Auger electron spectroscopy and scanning electron microscopy. For comparison, composites have also been prepared from Ni, Ni-Al, and Ni-Al-Zr solid solution matrices, to evaluate the effects of matrix strength and reactivity on processing and fiber/matrix reactions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 350: Symposium U – Intermetallic Matrix Composites III , 1994 , 125
Copyright
Copyright © Materials Research Society 1994

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