Microstructure and wear resistance of laser clad TiB-TiC/TiNi-Ti2Ni intermetallic coating on titanium alloy

被引：81
作者：
Feng Shu-rong [1 ,2 ]
Tang Hai-bo [1 ,2 ]
Zhang Shu-quan [1 ,2 ]
Wang Hua-ming [1 ,2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
[2] Beihang Univ, Engn Res Ctr, Minist Educ Laser Direct Mfg Large Metall Compone, Beijing 100191, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2012年 / 22卷 / 07期
关键词：
intermetallic; composite; coating; laser cladding; wear; STEEL-MATRIX COMPOSITES; IN-SITU; TIB2-TIC COMPOSITES; TENSILE PROPERTIES; SHS REACTION; NI-TI-B4C; MECHANISM; SYSTEMS;
D O I：
10.1016/S1003-6326(11)61371-X
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
A wear resistant TiB-TiC reinforced TiNi-Ti2Ni intermetallic matrix composite coating (TiB-TiC/TiNi-Ti2Ni) was prepared on Ti-6.5Al-2Zr-1Mo-1V titanium alloy by the laser cladding process using Ti+Ni+B4C powder blends as the precursor materials. Microstructure and worn surface morphologies of the coating were characterized by optical microscopy (OM), scan electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray analysis (EDS) and atomic force microscopy (AFM). Wear resistance of the coating was evaluated under dry sliding wear test condition at room temperature. The results indicate that the laser clad coating has a unique microstructure composed of flower-like TiB-TiC eutectic ceramics uniformly distributed in the TiNi-Ti2Ni dual-phase intermetallic matrix. The coating exhibits an excellent wear resistance because of combined action of hard TiB-TiC eutectic ceramic reinforcements and ductile TiNi-Ti2Ni dual-phase intermetallic matrix.
引用
收藏
页码：1667 / 1673
页数：7
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