Preparation,structure and mechanical properties of Sialon ceramics by transition metal-catalyzed nitriding reaction

被引:1
作者
Qing-Ming Xiong [1 ]
Zhi Chen [1 ]
Jun-Tong Huang [1 ]
Meng Zhang [1 ]
Hui Song [1 ]
Xi-Feng Hou [2 ]
Xi-Bao Li [1 ]
Zhi-Jun Feng [1 ]
机构
[1] School of Materials Science and Engineering,Nanchang Hangkong University
[2] Tianjin Boya Dadi New Material Technology Ltd.
基金
中国国家自然科学基金;
关键词
Transition metal; Sialon; Whiskers or fibers; Nitridation reaction; Flexural strength; Compression resistance;
D O I
暂无
中图分类号
TQ174.1 [基础理论];
学科分类号
0805 ; 080502 ;
摘要
Sialon ceramics were prepared by the nitridation of Si,Al and Al2O3powders with the transition metals(Fe Co,Ni)catalysts.The phase composition,microstructure and mechanical properties of specimens were studied Compared with the catalyst-free specimen,the addition of Fe,Co and Ni greatly promoted the nitridation process of Sialon ceramics and improved the weight gain rate and mechanical properties of specimens.With the increased content of catalysts,the apparent porosity of the products decreased first and then increased,contrary to flexural strength and compressive strength.The specimen with 2.5 wt%Fe had the highest flexural strength 145.8 MPa and it exhibited the highest compressive strength of 594.6 MPa when Co content was 2.5 wt%,whereas they were 71.9 and 78.7 MPa,respectively,when without catalyst.
引用
收藏
页码:589 / 596
页数:8
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