文献类型：期刊文献

英文题名：Microstructure and wear resistance of one-step in-situ synthesized TiN/Al composite coatings on Ti6Al4V alloy by a laser nitriding process

作者：Fu, Yao[1];Zhang, Xian-Cheng[1];Sui, Jian-Feng[1];Tu, Shan-Tung[1];Xuan, Fu-Zhen[1];Wang, Zheng-Dong[1]

机构：[1]E China Univ Sci & Technol, MOE, Key Lab Pressurized Syst & Safety, Shanghai 200237, Peoples R China

年份：2015

卷号：67

起止页码：78

外文期刊名：OPTICS AND LASER TECHNOLOGY

收录：;EI(收录号：20150200406711);WOS:【SCI-EXPANDED(收录号:WOS:000346549100013)】；

基金：The authors are grateful for the support by National Natural Science Foundations of China (51175177, 51322510, 51371082). The author Xiancheng Zhang is also grateful for the support by Special Programs for Key Basic Research of Science and Technology Commission of Shanghai Municipality (13DJ1400202 and 12JC1403200).

语种：英文

外文关键词：Laser nitriding; Composite coating; In-situ synthesis

摘要：The aim of this paper was to develop a one-step in situ method to synthesize the TiN reinforced Al metallic matrix composite coatings on Ti6Al4V alloy. In this method, the AI powder and nitrogen gas were simultaneously fed into feeding nozzle during a laser nitriding process. The microstructure, microhardness and sliding wear resistance of TiN/Al coatings synthesized at different laser powers in laser nitriding were investigated. Results showed that the crack- and pore-free coatings can be made through the proposed method. However, the morphologies and distribution of TiN dendrites and wear resistance of coatings were strongly dependent on laser power used in nitriding. With increasing the laser power, the amount and density of massive TiN dendritic structure in the coating decreased and the elongated and narrow dendrites increased, leading to the increment of wear resistance of coating. When the laser power is high, the convectional flow pattern of the melt pool can be seen near the bottom of pool. (C) 2014 Elsevier Ltd. All rights reserved.