Microstructure and wear performance enhancement of carbon nanotubes reinforced composite coatings fabricated by laser cladding on titanium alloy

被引：36
|
作者：
Ye, Zhiyun [1 ]
Li, Jianing [1 ]
Liu, Liqiang [1 ]
Ma, Fukun [1 ]
Zhao, Bo [1 ]
Wang, Xiaolin [1 ,2 ]
机构：
[1] Shandong Jianzhu Univ, Sch Mat Sci & Engn, Jinan 250101, Shandong, Peoples R China
[2] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, AIIM Facil, Bldg 231,Innovat Campus,Squires Way, North Wollongong, NSW 2500, Australia
来源：
OPTICS AND LASER TECHNOLOGY | 2021年 / 139卷
关键词：
Titanium alloy; Carbon nanotubes; Laser; Amorphous phase;
D O I：
10.1016/j.optlastec.2021.106957
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Carbon nanotubes (CNTs) reinforced composites were deposited on the TA2 titanium alloy by mean of a laser cladding (LC) of the Al3Ti-Cu-SiC-CNTs mixed powders, showing that huge amounts of the reinforced nanocrystalline phases/amorphous phases (APs) were fabricated in this coating; large amounts of the point defects were produced in the precipitates under an action of extreme high-temperature of a laser puddle; the mutual diffusion between C/Si can be achieved due to the similar atomic radii of them, forming APs. COF of this LC coating was in a range of 0.443 similar to 0.472, which was significantly lower than that of TA2 (0.562 similar to 0.581); considering that COF of this coating decreased significantly under actions of the Ti-Si-C compounds/CNTs due to self-lubricating effect, the reinforced phases in coating were beneficial to decrease COF due to the dispersion strengthening effect.
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页数：5
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