Indentation response of molybdenum disilicide

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1998.0371· OSTI ID:658480

Newman, A; Jewett, T; Sampath, S; Berndt, C; Herman, H ^[1]

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1. Department of Materials Science and Engineering, Stony Brook, State University of New York, Stony Brook, New York 11794-2275 (United States)

The influence of microstructure on the indentation cracking behavior of molybdenum disilicide (MoSi{sub 2}) 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. {copyright} {ital 1998 Materials Research Society.}

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 658480
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 9 Vol. 13; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACOUSTIC EMISSION TESTING
CRACKS
ELASTICITY
FRACTURE PROPERTIES
GRAIN BOUNDARIES
GRAIN SIZE
HARDNESS
MECHANICAL TESTS
MICROSTRUCTURE
MOLYBDENUM COMPOUNDS
MOLYBDENUM SILICIDES
PLASTICITY
SILICON COMPOUNDS