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Microstructural characteristics of TiC-reinforced composite coating produced by laser syntheses

Published online by Cambridge University Press:  31 January 2011

Xiaolei Wu
Xiaolei Wu*
Affiliation:
Laboratory for Nonlinear Mechanics of Continuous Media, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China.
*
a) e-mail: xlwu@cc5.imech.ac.cn
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Abstract

An in situ method has been developed to produce a Ni alloy composite coating reinforced by in situ reacted and gradiently distributed TiC particles by one-step laser cladding. The dispersed, ultrafine TiC particles in the coating are observed. Most of TiC particles, evidently with a gradient distribution, are uniformly distributed within interdendritic regions due to the trapping effect of advanced solid–liquid interface. The TiC/γ–Ni interface is clean and free from deleterious surface reactions. The microhardness of the coating also has a gradient variation, with the highest value being 1250 Hv 0.2.

Type
Materials Communications
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 2704 - 2707
Copyright
Copyright © Materials Research Society 1999

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