Effect of C/Ti ratio on densification, microstructure and mechanical properties of TiCX prepared by reactive spark plasma sintering

被引：71

作者：

Vasanthakumar, K. ^{[1
]}

Bakshi, Srinivasa Rao ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India

来源：

CERAMICS INTERNATIONAL | 2018年 / 44卷 / 01期

关键词：

Stoichiometry; Reactive spark plasma sintering; Titanium carbide; C/Ti ratio; HIGH-TEMPERATURE SYNTHESIS; IN-SITU SYNTHESIS; TITANIUM CARBIDE; MATRIX COMPOSITES; HYDROGEN INSERTION; RAMAN-SPECTROSCOPY; CARBON VACANCIES; STOICHIOMETRY; POWDERS; BEHAVIOR;

D O I：

10.1016/j.ceramint.2017.09.202

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：

Titanium carbide (TiC) has been widely used as reinforcement in metal matrix composites and is known to exist over a wide range of stoichiometry. In this study, the effect of C/Ti ratio on the densification kinetics, grain size, lattice parameter, hardness and elastic modulus of TICx, prepared by reactive spark plasma sintering (RSPS) is presented. Commercial purity titanium was ball milled with 5, 7.5, 10, 12.5, 15 and 17.5 wt% carbon black powder for 5 h and subjected to RSPS to prepare TICx samples with different C/Ti ratio. Dense TiCX samples with 'x' ranging from 0.34 to 0.78 could be prepared by RSPS at 1400 degrees C. Increasing C/Ti ratio was found to increase the activation energy thereby reducing the rate of sintering and also resulted in finer grain size. The lattice parameter and the ratio of intensities of (200) to (111) peaks were correlated with the C/Ti ratio. The hardness and elastic modulus were shown to increase significantly with increase in C/Ti ratio.

引用

页码：484 / 494

页数：11

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