Spark plasma sintering and pressureless sintering of SiC using aluminum borocarbide additives

被引：25

作者：

Lee, Sea-Hoon ^{[1
]}

Tanaka, Hidehiko ^{[1
]}

Kagawa, Yutaka ^{[2
]}

机构：

[1] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050044, Japan

[2] Univ Tokyo, RCAST, Meguro Ku, Tokyo 1538505, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 10期

关键词：

Calcination; Sintering; Mechanical properties; SiC; Structural applications; SILICON-CARBIDE CERAMICS; GRAIN-BOUNDARIES; TEMPERATURE; TRANSFORMATION; EVOLUTION; NITRIDE; POWDERS; AL8B4C7; GROWTH; BORON;

D O I：

10.1016/j.jeurceramsoc.2008.12.006

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Aluminum borocarbide powders (Al(3)BC(3) and Al(8)B(4)C(7)) were synthesized, and the ternary powders were used as a sintering additive of SiC. The densification of SiC was nearly completed at 1670 degrees C using spark plasma sintering (SPS) and pressureless sintering was possible at 1950 degrees C. The sintering behavior of SiC using the new additive systems was nearly identical with that using the conventional AI-B-C system, but grain growth was suppressed when adding the borocarbides. In addition, oxidation of the fine additive powders did not intensively occur in air, which has been a problem in the case of the AI-B-C system for industrial application. The hardness, Young's modulus and fracture toughness of a sintered SiC specimen were 21.6 GPa, 439 GPa and 4.6 MPa m(1/2), respectively. The ternary borocarbide powders are efficient sintering additives of SiC. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2087 / 2095

页数：9

共 33 条

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