Sintering behavior of titanium-titanium nitride nanocomposite powders

被引：26

作者：

Dabhade, V. V. ^{[1
]}

Mohan, T. R. Rama ^{[1
]}

Ramakrishnan, P. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 453卷 / 1-2期

关键词：

metal matrix composites; nanostructured materials; powder metallurgy; sintering;

D O I：

10.1016/j.jallcom.2006.11.187

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The sintering behavior of titanium-titanium nitride nanocomposite powders has been investigated by dilatometry. Micron-sized titanium powders of average particle size of similar to 12 mu m and nano sized titanium nitride powders of average particle size of similar to 50 nm were used to produce two compositions of Ti-8 wt%TiN and Ti-15 wt%TiN by physical mixing and ultrasonification. Dilatometry was carried out by constant rate of heating (10 degrees C/min) to various temperatures in the range of 650-1250 degrees C followed by isothermal holding for I h. The effect of nano TiN dispersion on the sintering onset temperature, linear shrinkage, shrinkage rate, activation energy, and microstructure of titanium was investigated. The sintering of titanium-titanium nitride nanocomposites was found to be influenced by the sintering between the Ti-Ti contacts (self diffusion), Ti-TiN contacts (diffusion of N into Ti), TiN-TiN contacts, the role of oxygen as well as the alpha-beta transformation in titanium. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：215 / 221

页数：7

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