Solid Phase’s Transformations in Boron Carbide Based Composites during Heat Treatment

Abstract:

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Lightweight B4C/Al composites were produced from powders of boron carbide and aluminum by self-propagating high-temperature synthesis (SHS). The effects of postdensification heat treatment at different temperatures and environmental conditions on phase transformations and properties evolution were studied. Heat treatment processing that followed the synthesis was applied using low heating rate in temperature range from 400°C up to 1500°C. An interconnected multiphase (B4C, Al3BC, and c-BN) microstructure was produced in composite as a result of heat treatment at temperatures below 1080°C. The formation of hard and brittle reaction products (AlN, AlB2, Al4C3, and Al8B4C7) at temperatures above 1150°C causes decrease in bending strength and increase in resistance to unlubricated sliding wear.

Info:

Periodical:

Solid State Phenomena (Volume 138)

Edited by:

J. Čermák and I. Stloukal

Pages:

175-180

DOI:

10.4028/www.scientific.net/SSP.138.175

Citation:

L. A. Kommel and E. Kimmari, "Solid Phase’s Transformations in Boron Carbide Based Composites during Heat Treatment", Solid State Phenomena, Vol. 138, pp. 175-180, 2008

Online since:

March 2008

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Price:

$35.00

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