THERMOMECHANICAL PROPERTIES OF BETA-SIALON SYNTHESIZED FROM KAOLIN

被引：25

作者：

LEE, HL

LIM, HJ

KIM, S

LEE, HB

机构：

[1] Department of Ceramic Engineering, Yonsei University, Seoul 120-749, Korea, Republic of

[2] Department of Ceramic Engineering, Myoung Ji University, Yongin, 449-800, Korea, Republic of

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1989年 / 72卷 / 08期

关键词：

Particle size - Graphite - Fracture toughness - Powder metals - Ceramic materials - Sintering;

D O I：

10.1111/j.1151-2916.1989.tb07675.x

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：

β-Sialon powder was synthesized by the simultaneous reduction and nitri-dation of Hadong kaolin at 1350°C in an N2-H2 atmosphere, using graphite as a reducing agent. The average particle size of β-sialon powder was about 4.5 μm. The synthesized β-sialon powder was pressureless sintered from 1450° to 1850°C under a N2 atmosphere. The relative density, modulus of rupture, fracture toughness, and microhardness of β-sialon ceramics sintered at 1800 °C for 1 h were 92%, 248 MPa, 2.8 MN/m3/2, and 13.3 GN/m2, respectively. The critical temperature difference (ΔTC) in water-quench thermal-shock behavior was about 375°C for the synthesized β-sialon ceramics. (Key words: sialons, metals, kaolin, thermomechanical properties, graphite.

引用

页码：1458 / 1461

页数：4

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