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三维连续网络Ti2AlC/TiAl复合材料高温摩擦磨损行为研究
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贵州大学机械工程学院

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中图分类号:

TB333

基金项目:

国家自然科学基金资助(项目号52065009);贵州省联合基金资助(项目号20167437)


High-temperature friction and wear behavior of three-dimensional continuous network Ti2AlC/TiAl composites
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Affiliation:

1.College of Mechanical Engineering,Guizhou University,Gui’yang 550025;2.China

Fund Project:

Strengthening and Toughening Design of laser cladding TiAl (CN) max phase composite coating and its wear damage mechanism in seawater environment;In situ synthesis of three dimensional network Ti3AlC2 / TiAl Matrix Composites and their High Temperature Tribological Behavior

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    摘要:

    采用真空热压制备了三维连续网络Ti2AlC/TiAl复合材料,在明晰其高温氧化行为的基础上,利用摩擦磨损试验机对复合材料的高温氧化磨损行为及其机理进行了研究。结果表明,高温氧化条件下,复合材料表面在600℃以下生成Al2O3藓状氧化物,在800℃时生成TiO2聚集团以及TiO2和Al2O3的氧化物混合层;随着温度的升高,氧化膜的润滑作用使得摩擦系数降至0.3237,基材的软化与TiO2聚集团的突出生长使得磨损速率逐渐升至4.5×10-4mm3/(N.m),磨损机理由磨粒磨损转变为磨粒磨损与氧化磨损的混合磨损。

    Abstract:

    Three dimensional continuous network Ti2AlC / TiAl Composites were prepared by vacuum hot pressing. The high temperature oxidation behavior and mechanism of the composites were studied by friction and wear tester. The results show that under the high temperature oxidation condition, the surface of the composite is formed with Al2O3 mossy oxide below 600 ℃, and the TiO2 agglomerate and the mixed layer of TiO2 and Al2O3 are formed at 800 ℃; with the increase of temperature, the friction coefficient decreases to 0.3237 due to the lubrication of the oxide film, and the softening of the substrate and the prominent growth of TiO2 agglomerates make the wear rate increase to 4.5×10-4mm3/(N.m) The abrasive wear is transformed into the mixed wear of abrasive wear and oxidation wear.

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冯进宇,肖华强,赵思皓,肖易,游川川,赵欣鑫.三维连续网络Ti2AlC/TiAl复合材料高温摩擦磨损行为研究[J].稀有金属材料与工程,2021,50(11):4066~4072.[Feng Jinyu, Xiao Huaqiang, Zhao Sihao, Xiao Yi, You Chuanchuan, Zhao Xinxin. High-temperature friction and wear behavior of three-dimensional continuous network Ti2AlC/TiAl composites[J]. Rare Metal Materials and Engineering,2021,50(11):4066~4072.]
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  • 收稿日期:2020-11-24
  • 最后修改日期:2021-01-08
  • 录用日期:2021-02-04
  • 在线发布日期: 2021-11-30
  • 出版日期: 2021-11-24