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Effect of Processing on the High Temperature Mechanical Properties of Mosi2

Published online by Cambridge University Press:  01 January 1992

S.N. Patankar
Affiliation:
Dept. of Materials Science and Engineering, Case Western Reserve University, Cleveland OH 44106
J.J. Lewandowski
Affiliation:
Dept. of Materials Science and Engineering, Case Western Reserve University, Cleveland OH 44106
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Abstract

Polycrystalline MoSi2 has been processed via spex milling and the notched fracture behavior has been determined at 800 -1400°C. Elemental Mo and Si powders were mechanically alloyed to produce MoSi2 and were subsequently vacuum hot pressed to fully dense MoSi2 compacts. Microstructures were analyzed and both hardness and notched fracture tests were conducted at high temperatures. The material toughness was constant at 4.5 MPa m½between 800 and 1000 °C, with significant plasticity exhibited at 1200°C. The results will be compared to recent work on the effects of C on high temperature properties of MoSi2.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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