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激光原位合成TiB-TiC顆粒增強鈦基復合材料的組織與其耐磨性能
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沈陽航空航天大學 機電工程學院,沈陽航空航天大學 機電工程學院,沈陽航空航天大學 航空制造工藝數(shù)字化國防重點學科實驗室,南京工業(yè)大學 新材料研究院

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國家自然科學基金資助(51201161);遼寧省自然科學基金資助(201302411)


Microstructure and Wear-resistant Properties of the in situ TiB-TiC Reinforced Titanium Matrix Composites by Laser Deposition Manufacturing
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School of Mechatronics Engineering,Shenyang Aerospace University,School of Mechatronics Engineering,Shenyang Aerospace University,,Institute for New Materials,Nanjing Tech University

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    摘要:

    采用激光沉積制造技術(shù)原位合成以TiB-TiC為增強相的鈦基復合材料。借助XRD、SEM、EDS以及硬度測試和室溫耐磨實驗,研究鈦基復合材料的組織及其耐磨性能。結(jié)果表明:制備樣品中的強化相為TiC和TiB,其中TiC呈近似等軸狀,TiB呈晶須狀或棱柱狀;隨著增強相含量的增加,鈦基復合材料硬度增加,但摩擦系數(shù)變化不大,磨損失重先減小后增大,說明鈦基復合材料的耐磨性能不僅僅與硬度有關(guān);與基材相比,B元素和C元素為1.2wt%和0.84wt%的鈦基復合材料具有較好的耐磨性能,其磨損失重僅為基材的53%;鈦基復合材料的磨損機制為磨粒磨損和極少量氧化磨損的共同作用。

    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.

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何波,蘭姣姣,楊光,韋華.激光原位合成TiB-TiC顆粒增強鈦基復合材料的組織與其耐磨性能[J].稀有金屬材料與工程,2017,46(12):3805~3810.[He Bo, Lan Jiaojiao, Yang Guang, 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.]
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  • 收稿日期:2016-09-29
  • 最后修改日期:2016-09-29
  • 錄用日期:2016-12-07
  • 在線發(fā)布日期: 2018-01-04
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