Phase constituents and mechanical properties of laser in-situ synthesized TiCN/TiN composite coating on Ti-6Al-4V

被引：62

作者：

Yang, Yuling ^{[1
]}

Yao, Wenming ^{[1
]}

Zhang, Hezhi ^{[1
]}

机构：

[1] Northeastern Univ, Coll Sci, Shenyang 110004, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2010年 / 205卷 / 02期

基金：

美国国家科学基金会;

关键词：

Laser deposition; In-situ synthesis; TiCN/TIN; Coating; MULTILAYER; FRICTION; DEPOSITION; BEHAVIOR; EROSION; SURFACE; TIN;

D O I：

10.1016/j.surfcoat.2010.07.058

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Laser in-situ synthesis technology at room temperature was applied to obtain TICN/TIN composite coating. A pulsed Nd YAG laser (wavelength 1064 nm) was used to melt the mixture of Ti and C powder. Pure nitrogen gas with a pressure of 0.4 MPa was introduced coaxially together with laser beam to the melting pool to react with Ti and C atoms and in-situ synthesize TICN/TIN composite coating. The coating consists of TiC0 3N0 7. TiN and TIN 3, but the proportions of these three constituents vary with the laser power density. SEM results revealed that dendrites were oriented in accordance with the heat flow and a metallurgical bonding between the coating and the substrate was achieved. The in-situ synthesized TICN/TIN composite coating, with a thickness of about 200 mu m, increased the hardness and wear resistance compared to the bare Ti-6Al-4V substrate. A remarkable improvement of the average microhardness (3-4 times) and an enhancement of the wear resistance (10-11 times) are observed by laser in-situ synthesizing TICN/TIN composite coating. (C) 2010 Elsevier B.V All rights reserved

引用

页码：620 / 624

页数：5

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