文献类型：会议论文

英文题名：Synthesis of TiN/Ti₃Al composite coatings on Ti6Al4V alloy by plasma spraying and laser nitriding

作者：Zhang, X. C.[1];Liu, Z. D.[1];Xu, J. S.[1];Xuan, F. Z.[1];Wang, Z. D.[1];Tu, S. T.[1]

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

会议论文集：8th Asian-European International Conference on Plasma Surface Engineering (AEPSE)

会议日期：SEP 19-22, 2011

会议地点：Dalian, PEOPLES R CHINA

语种：英文

外文关键词：Composite coating; Laser nitriding; Microstructure; Mechanical properties

摘要：The aim of this paper was to develop an in situ method to synthesize the TiN reinforced Ti3Al intermetallic matrix composite (IMC) coatings on Ti6Al4V alloy substrate by using plasma spraying and laser nitriding. The microstructure and mechanical properties of TiN/Ti3Al IMC coatings synthesized at different nitrogen flow rates (NFRs) in laser nitriding were investigated. Results showed that the crack- and pore-free IMC coatings can be made through the proposed method. The morphology of TiN phase and mechanical properties of coatings were strongly dependent on nitrogen NFR in nitriding. The TiN phase exhibited dendrite-like and undeveloped morphology at low nitrogen NFR. At high NFR, the TiN phase showed granular-like morphology. With increasing NFR, the amount of TiN phase in the coating increased, leading to the increment of microhardness and elastic modulus and the decrement of fracture toughness of coating. (C) 2012 Elsevier B.V. All rights reserved.