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Synthesis of submicrometer-sized TiC particles in aluminum melt at low melting temperature

Published online by Cambridge University Press:  27 March 2014

Zhiwei Liu ,
Xiaoming Wang ,
Qingyou Han  and
Jianguo Li
Zhiwei Liu*
Affiliation:
Department of Mechanical Engineering Technology, Purdue University, West Lafayette, Indiana 47906
Xiaoming Wang
Affiliation:
Department of Mechanical Engineering Technology, Purdue University, West Lafayette, Indiana 47906
Qingyou Han*
Affiliation:
Department of Mechanical Engineering Technology, Purdue University, West Lafayette, Indiana 47906
Jianguo Li
Affiliation:
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

This research discussed how to synthesize submicrometer-sized TiC particulate reinforcement in the molten aluminum melt at low temperature via combustion synthesis by using in situ casting technique. A high temperature preheating treatment of Al–Ti–C pellets was carried out, by which the thermal explosion reaction of the pellets could take place in the pure aluminum melt at 750 °C. The synthesizing temperature of TiC particles was reduced by at least 150 °C compared with the conventional methods. In situ formed TiC particles were spherical in shape and were smaller than 1 µm in size due to the low melting temperature. The emergence of liquid aluminum phase led to the generation and accumulation of plenty of heat in the pellet in a short time due to the reactive diffusion of Al(l)–Ti(s). The formation mechanism of the submicrometer-sized TiC particles in the molten aluminum at low temperature was discussed in this research.

Keywords

particulatecombustion synthesiscasting
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 7 , 14 April 2014 , pp. 896 - 901
Copyright
Copyright © Materials Research Society 2014 

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