Preparation and Characterization of the Coated ZrB2 @ ZrO2 Ceramic

被引：3

作者：

Song Jianrong ^{[1
]}

Shen Qiang ^{[1
]}

Li Junguo ^{[1
]}

Zhang Lianmeng ^{[1
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

来源：

ADVANCED SYNTHESIS AND PROCESSING TECHNOLOGY FOR MATERIALS | 2009年 / 66卷

关键词：

ZrB2; ZrO2; coating; PECS;

D O I：

10.4028/www.scientific.net/AMR.66.226

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work. ZrB2 powder coated with ZrO2 (ZrB2 @ ZrO2) were applied to promote the densification of ZrB2 prepared by pulsed electric current sintering (PECS) The coating process and sintering behavior were investigated While the pH value was about 9, the ZrB2 particles were successfully coated with ZrO2 by co-precipitation methods The thickness of ZrO2 layer was about 3-5nm The coated powder was sintered at 1600 degrees C similar to 1950 degrees C by PECS in vacuum. For comparison, the pure ZrB2 powder was sintered at the same conditions The relative density of the sample coated with ZrO2 was 97 8% at PECS 1950 degrees C, which was higher than that of sample without coating The densification process can be divided into three stages The ZrO2 coating layer plays an important role on the densification of ZrB2

引用

页码：226 / 229

页数：4

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