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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

Clc Number:

TB333

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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    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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[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.]
DOI:10.12442/j. issn.1002-185X.20200910

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History
  • Received:November 24,2020
  • Revised:January 08,2021
  • Adopted:February 04,2021
  • Online: November 30,2021
  • Published: November 24,2021