Sintering studies on ultrafine ZrB2 powder produced by a self-propagating high-temperature synthesis process

被引：66

作者：

Pathak, SKM ^{[1
]}

Das, S ^{[1
]}

Das, SK ^{[1
]}

Ramachandrarao, P ^{[1
]}

机构：

[1] Natl Met Lab, Jamshedpur 831007, Bihar, India

来源：

JOURNAL OF MATERIALS RESEARCH | 2000年 / 15卷 / 11期

关键词：

D O I：

10.1557/JMR.2000.0359

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A detailed study on the sintering behavior of zirconium diboride powder produced by the self-propagating high-temperature synthesis (SHS) process was carried out in the temperature range of 1500-1800 degreesC. The fine powder prepared by the SHS process exhibited excellent sinterability and could be sintered at 1800 degreesC for 1 h to approximately 94% of the theoretical density. The apparent activation energy of densification in the range of 1500-1800 degreesC was estimated to be 248 +/- 4 kJ mol(-1). A zirconium dioxide layer formed on the surface of the sintered body and was attributed to boron oxide formation during sintering and concurrent surface oxidation by the oxygen generated from the reduction of boron oxide in the carbonaceous atmosphere. Sintering aids like Fe and Cr appeared to help in densification of ZrB2 powder.

引用

页码：2499 / 2504

页数：6

共 14 条

[1]

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[2] Synthesis and analysis of ZrB2-based composites [J].