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http://dx.doi.org/10.4191/KCERS.2008.45.1.060

Sintering Behavior and Mechanical Property of B4C Ceramics Fabricated by Spark Plasma Sintering  

Kim, Kyoung-Hun (Korea Institute of Ceramic Engineering and Technology)
Chae, Jae-Hong (Korea Institute of Ceramic Engineering and Technology)
Park, Joo-Seok (Korea Institute of Ceramic Engineering and Technology)
Kim, Dae-Keun (Korea Institute of Ceramic Engineering and Technology)
Shim, Kwang-Bo (Division of Advanced Materials Science and Engineering, Hanyang University)
Lee, Byung-Ha (Department of Materials Science and Engineering, Myongji University)
Publication Information
Journal of the Korean Ceramic Society / v.45, no.1, 2008 , pp. 60-64 More about this Journal
Abstract
[ $B_4C$ ] ceramics were fabricated by spark plasma sintering process and their sintering behavior, microstructure and mechanical properties were evaluated. Relative density of $B_4C$ ceramics could be achieved by spark plasma sintering method reached as high as 99% at lower temperature than conventional sintering method, in addition, without any sintering additives. The mechanical properties of $B_4C$ ceramics could be improved by the heat treatment at $1300^{\circ}C$ during sintering process which can be removed $B_2O_3$ phase from a $B_4C$ powder surface. This improvement results from the formation of a fine and homogeneous microstructure because the grain coarsening was suppressed by the elimination of $B_2O_3$ phase. Particularly, mechanical properties of the specimen experienced the $B_2O_3$ removing process improved over 30% compared with the specimen without that process.
Keywords
$B_4C$; Microstructure; Mechanical property; Spark plasma sintering;
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