High-Strength ZrC Ceramics Doped with Aluminum

被引：17

作者：

Wang, Xin-Gang ^{[1
,2
]}

Zhang, Guo-Jun ^{[1
]}

Zhao, Jian ^{[1
]}

Xue, Jia-Xiang ^{[1
]}

Xu, Chang-Ming ^{[1
]}

Wang, Pei-Ling ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab High Performance Ceram & Superfine Micros, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Coating Mat, Shanghai 200050, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2014年 / 97卷 / 11期

基金：

中国国家自然科学基金;

关键词：

ZIRCONIUM CARBIDE; TEMPERATURE; COMPOSITES;

D O I：

10.1111/jace.13252

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：

High-strength ZrC ceramics with relative density above 98% were prepared by reactive hot pressing of ZrC and Al at 1900 degrees C. The reaction between ZrC and Al resulted in the formation of ZrC1-x, Zr3Al3C5 and Zr-Al compound such as AlZr3 and Al-C-Zr. The intermediate product AlZr3 below 1600 degrees C and remained Al-C-Zr phase could form liquid phase and promoted the first stage of densification process. The improvement in densification behavior at higher temperatures (1800 degrees C-1900 degrees C) could be attributed to the formation of nonstoichiometric ZrC1-x. Adding 5wt% and 7.5wt% Al to ZrC, the formed ZrC0.85-Zr3Al3C5 and ZrC0.80-Zr3Al3C5 based ceramics had 3-point bending strength as high as 757 +/- 79MPa and 967 +/- 50MPa, respectively, with hardness and fracture toughness being 16.2-18.3GPa and 3.3-3.5MPam(1/2), respectively.

引用

页码：3367 / 3370

页数：4

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