Microstructure and wear resistance of in situ TiCp composite coating by laser cladding

Authors
Citation
Xl. Wu et Gn. Chen, Microstructure and wear resistance of in situ TiCp composite coating by laser cladding, J MAT SCI T, 15(3), 1999, pp. 233-238
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN journal
1005-0302 → ACNP
Volume
15
Issue
3
Year of publication
1999
Pages
233 - 238
Database
ISI
SICI code
1005-0302(199905)15:3<233:MAWROI>2.0.ZU;2-U
Abstract
A new in situ method was realized by one step laser cladding to produce Ni- base alloy composite coating reinforced by in situ reacted and gradiently d istributed TiCp particles. The submicron TiCp particles were formed and uni formly distributed because of the in situ reaction and trapping effect unde r the rapid solidification condition. And, TiCp particles were of gradient distribution on a macro scale and their volume fraction increased from 1.86 % at the layer/substrate interface to a maximum 38.4% at the surface of the layer. Furthermore, the in situ generated TiCp/gamma-Ni interfaces were fr ee from deleterious surface reactions. Additionally, the clad coating also revealed a high microhardness of gradient variation with the layer depth an d the superior abrasive wear resistance.