cBN reinforced Y-α-SiAlON composites

被引：36

作者：

Garrett, J. C. ^{[1
]}

Sigalas, I. ^{[1
]}

Herrmann, M. ^{[2
]}

Olivier, E. J. ^{[3
]}

O'Connell, J. H. ^{[3
]}

机构：

[1] Univ Witwatersrand, Sch Chem & Met Engn, DST NRF Ctr Excellence Strong Mat, ZA-2050 Johannesburg, South Africa

[2] Fraunhofer Inst Ceram Technol & Syst IKTS, Dresden, Germany

[3] Nelson Mandela Metropolitan Univ, Ctr High Resolut Transmiss Elect Microscopy, Port Elizabeth, South Africa

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2013年 / 33卷 / 11期

关键词：

Sialon; Boron nitride (cBN); Spark plasma sintering (SPS); Hardness; Toughness and toughening; BORON-NITRIDE COMPOSITES; FRACTURE-TOUGHNESS; PLASMA; MICROSTRUCTURE; DENSIFICATION;

D O I：

10.1016/j.jeurceramsoc.2013.03.014

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：

Dense alpha-Sialon-cBN composites were produced by FAST/SPS-sintering at 1575-1625 degrees C. The hardness of the materials increases only up to 21 GPa for materials with 10 vol.% cBN. On the other hand the fracture toughness increases up to nearly 8 MPa m(0.5) with 30 vol.% cBN. The reason for the increase in fracture toughness is attributed to crack deflection at cBN grains due to the weak bonding of the grains in the matrix. The weak interfaces are also responsible for the moderate increase in hardness. Detailed investigation of the interface between cBN and the matrix was carried out by TEM. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：2191 / 2198

页数：8

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