Mechanical properties and microstructure of laminated Si3N4+SiCw/BN+Al2O3 ceramics densified by spark plasma sintering

被引：19

作者：

Li, CW ^{[1
]}

Huang, Y ^{[1
]}

Wang, CA ^{[1
]}

Tang, K ^{[1
]}

Li, SQ ^{[1
]}

Zan, QF ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

MATERIALS LETTERS | 2002年 / 57卷 / 02期

关键词：

SPS; laminated ceramics; Si3N4; toughness; preferred orientation; SiC whisker;

D O I：

10.1016/S0167-577X(02)00787-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A laminated Si3N4 + SiCw/BN + Al2O3 ceramics was prepared by spark plasma sintering (SPS). Bending strength of this sample reached 600 MPa and the work of fracture reached 3500 J/m(2). The arrangement of the hard Si3N4 + SiCw layers and the soft BN + Al2O3 layers was the main reason for improving toughness of this ceramic. The SiC whisker and beta-Si3N4 had strong preferred orientation as indicated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：336 / 342

页数：7

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