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Indentation Response of Molybdenum Disilicide

Published online by Cambridge University Press:  31 January 2011

A. Newman ,
T. Jewett ,
S. Sampath ,
C. Berndt  and
H. Herman
A. Newman
Affiliation:
Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275
T. Jewett
Affiliation:
Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275
S. Sampath
Affiliation:
Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275
C. Berndt
Affiliation:
Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275
H. Herman
Affiliation:
Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275
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Abstract

The influence of microstructure on the indentation cracking behavior of molybdenum disilicide (MoSi2) has been examined. The indentation response of samples produced by various methods has been measured to examine the elastic/plastic nature, hardness, and fracture toughness. Fracture toughness comparisons were made by measuring indentation crack lengths, observing the elastic/plastic indentation response, and quantifying the differences in the indentation cracking behavior. Further information was gained by monitoring the acoustic activity during indentation for selected specimens. It has been observed that the fine grain size and the dispersion of the silica phase promote microcracking and crack deflection.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2662 - 2671
Copyright
Copyright © Materials Research Society 1998

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