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Processing and Properties of Reaction Bonded Silicon Nitride Made from Laser Synthesized Silicon Powders

Published online by Cambridge University Press:  28 February 2011

J. S. Haggerty
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139
G. Garvey
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139
J-M. Lihrmann
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA 02139
J.E. Ritter
Affiliation:
University of Massachusetts, Amherst, MA 01003
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Abstract

Laser synthesized silicon powders have been used to make reaction bonded silicon nitride samples. Maximum hardness (11.3 GNm−2), fracture toughness (3.6 MNm−3/2), pore size (Hg porosimetry 50–300Å radius) and strength (∼460 MNm−2) values reflect the superior microstructures that are observed. With anaerobic anhydrous processing, these powders nitride to completion in less than 7 hours at 1400°C.

Type
Research Article
Copyright
Copyright © Materials Research Society 1986

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