Study of the mechanical properties, toughening and strengthening mechanisms of Si3N4/Si3N4w/TiN nanocomposite ceramic tool materials

被引：49

作者：

Zou, Bin ^{[1
]}

Huang, Chuanzhen

Chen, Ming

Gu, Meilin

Liu, Hanlian

机构：

[1] Shanghai Jiao Tong Univ, Sch Mech Engn, Shanghai 200240, Peoples R China

[2] Shandong Univ, Sch Mech Engn, Ctr Adv Jet Engn Technol, Jinan 250061, Peoples R China

来源：

ACTA MATERIALIA | 2007年 / 55卷 / 12期

关键词：

ceramic tool materials; nanoscale; mechanical properties; microstructure; toughening and strengthening mechanisms;

D O I：

10.1016/j.actamat.2007.03.016

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Si3N4/Si3N4w/TiN nanocomposites were fabricated by a hot-pressing technology with different sintering processes. The effect of nanoscale TiN and Si3N4w on the mechanical properties was investigated. The microstructure and indention cracks were observed by scanning electron microscopy, transmission electron microscopy and energy-dispersive spectrometry investigations. The research results showed that Si3N4/Si(3)N(4w)20/TiN5 nanocomposites containing 5 vol.% of nanoscale TiN and 20 vol.% of nanoscale Si3N4w, which were sintered under a pressure of 30 MPa at a temperature of 1650 degrees C for 40 min, had optimum mechanical properties. The addition of both nanoscale TiN and nanoscale Si3N4w contributed to the microstructural evolution and an improvement of the mechanical properties. The toughening and strengthening mechanisms are discussed for Si3N4/Si(3)N(4w)20/TiN5 nanocomposites. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4193 / 4202

页数：10

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