Wear Behavior of Cold Pressed and Sintered Al2O3/TiC/CaF2 ­Al2O3/TiC Laminated Ceramic Composite

  • Xuefeng YANG ,
  • Jian CHENG ,
  • Peilong SONG ,
  • Shouren WANG ,
  • Liying YANG ,
  • Yanjun WANG ,
  • Ken MAO
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  • 1) School of Mechanical Engineering, University of Jinan, Jinan 250022, China
    2)  Key Laboratory for Anisotropy and Texture of Materials of the Ministry of Education, Northeastern University, Shenyang 110089, China

Received date: 2012-12-10

  Revised date: 2013-01-08

  Online published: 2013-03-14

Supported by

National Natural Science Foundation for Young Scholars of China (No. 51005100), China Postdoctoral Science Foundation (No. 20110491572) andScienti?candTechnologicDevelopment Program ofShandong Province(No. 2012GGX10324).

Abstract

A novel laminated Al2O3/TiC/CaF2-Al2O3/TiC sandwich ceramic composite was fabricated through cold pressing and sintering to achieve better anti-wear performance, such as low friction coefficient and low wear rate. Al2O3/TiC/CaF2 and Al2O3/TiC composites were alternatively built layer-by-layer to obtain a sandwich structure. Solid lubricant CaF2 was added evenly into the Al2O3/TiC/CaF2 layer to reduce the friction and wear. Al2O3/TiC ceramic was also cold pressed and sintered for comparison. Friction analysis of the two ceramics was then conducted via a wear-and-tear machine. Worn surface and surface compositions were examined by scanning electron microscopy and energy dispersion spectrum, respectively. Results showed that the laminated Al2O3/TiC/CaF2-Al2O3/TiC sandwich ceramic composite has lower friction coefficient and lower wear rate than those of Al2O3/TiC ceramic alone because of the addition of CaF2 into the laminated Al2O3/TiC/CaF2-Al2O3/TiC sandwich ceramic composite. Under the friction load, the tiny CaF2 particles were scraped from the Al2O3/TiC/CaF2 layer and spread on friction pairs before falling off into micropits. This process formed a smooth, self-lubricating film, which led to better anti-wear properties. Adhesive wear is the main wear mechanism of Al2O3/TiC/CaF2 layer and abrasive wear is the main wear mechanism of Al2O3/TiC layer.

Cite this article

Xuefeng YANG , Jian CHENG , Peilong SONG , Shouren WANG , Liying YANG , Yanjun WANG , Ken MAO . Wear Behavior of Cold Pressed and Sintered Al2O3/TiC/CaF2 ­Al2O3/TiC Laminated Ceramic Composite[J]. Acta Metallurgica Sinica (English Letters), 2013 , 26(2) : 157 -166 . DOI: 10.1007/s40195-012-0247-5

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