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何波,兰姣姣,杨光,韦华.激光原位合成TiB-TiC颗粒增强钛基复合材料的组织与其耐磨性能[J].稀有金属材料与工程(英文),2017,46(12):3805~3810.[He Bo,Lan Jiaojiao,Yang Guang and Wei Hua.Microstructure and Wear-resistant Properties of the in situ TiB-TiC Reinforced Titanium Matrix Composites by Laser Deposition Manufacturing[J].Rare Metal Materials and Engineering,2017,46(12):3805~3810.]
Microstructure and Wear-resistant Properties of the in situ TiB-TiC Reinforced Titanium Matrix Composites by Laser Deposition Manufacturing
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Received:September 29, 2016  Revised:September 29, 2016
DOI:
Key words: Titanium matrix composites  laser deposition manufacturing  wear-resistant properties
Foundation item:国家自然科学基金资助(51201161);辽宁省自然科学基金资助(201302411)
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He Bo,Lan Jiaojiao,Yang Guang and Wei Hua  
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Abstract:
      The TiB-TiC Reinforced Titanium matrix composites (TMCs) were manufactured by Laser Deposition Manufacturing (LDM) technique with the ball milled TA15+B4C powders with different compositions of B and C elements. The microstructure and wear-resistant properties of the prepared TMCs were studied by XRD, SEM, EDS, hardness test and wear resistance test. The obtained results revealed that in the prepared TMCs, there were two types of the reinforcement, namely the TiC reinforcement with the near-equiaxed shape and the TiB reinforcement with the whisker or prismatic shape. With the increase in the reinforcement content, the hardness of TMCs improved, the friction coefficient might be unchangable and the wear mass loss increased first and then decreased. Compared with the substrate, the TMC containing 1.2 wt% boron and 0.84 wt % carbon showed better wear-resistant properties. The wear mechanism of the prepared TMCs involved the abrasive wear and a small amount of oxidation wear.