Sialon ceramic with gradient microstructures

被引：4

作者：

Chen, L ^{[1
]}

Kny, E ^{[1
]}

Groboth, G ^{[1
]}

机构：

[1] Austrian Res Ctr Seibersdorf, Div Engn, Inst Mat Technol, A-2444 Seibersdorf, Austria

来源：

SURFACE & COATINGS TECHNOLOGY | 1998年 / 100卷 / 1-3期

关键词：

gradient microstructure; Sialon ceramic;

D O I：

10.1016/S0257-8972(97)00641-5

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In order to combine the high hardness of alpha-Sialon and high toughness of beta-Sialon, a graded Sialon ceramic was developed in this work. The microstructures and the properties of the graded Sialon ceramic change gradually from spherical alpha-Sialon grains on the surface (HV10 = 19 GPa, HV0.1 = 34 GPa. and K-1c = 4.3 MPam(1/2)) to elongated beta-Sialon grains in the inner core (HV10 = 15.7 GPa, HV0.1 = 24 GPa and K-1c = 7.3 MPam(1/2)). Mixtures of the alpha-Sialon grains and the beta-Sialon grains were observed in the transitional zone with hardness HV0.1 = 24 similar to 30 GPa. The graded Sialon ceramic was produced in situ by using a green compact starting from a homogeneously mixed powder mixture. (C) 1998 Elsevier Science S.A.

引用

页码：320 / 323

页数：4

共 6 条

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