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Wear behavior of cold pressed and sintered Al2O3/TiC/CaF2-Al2O3/TiC laminated ceramic composite
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Yang, Xuefeng , Cheng, Jian, Song, Peilong , Wang, Shouren, Yang, Liying, Wang, Yanjun and Mao, Ken (2013) Wear behavior of cold pressed and sintered Al2O3/TiC/CaF2-Al2O3/TiC laminated ceramic composite. Acta Metallurgica Sinica, Volume 26 (Number 2). pp. 157-166. doi:10.1007/s40195-012-0247-5
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Official URL: http://dx.doi.org/10.1007/s40195-012-0247-5
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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Acta Metallurgica Sinica | ||||
| Publisher: | The Chinese Society for Metals | ||||
| ISSN: | 1006-7191 | ||||
| Official Date: | April 2013 | ||||
| Dates: |
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| Volume: | Volume 26 | ||||
| Number: | Number 2 | ||||
| Page Range: | pp. 157-166 | ||||
| DOI: | 10.1007/s40195-012-0247-5 | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | National Natural Science Foundation for Young Scholars of China , China Postdoctoral Science Foundation , Scientific and Technologic Development Program of Shandong Province | ||||
| Grant number: | 51005100 (National Natural Science Foundation for Young Scholars of China); 20110491572 (China Postdoctoral Science Foundation); 2012GGX10324 (Scientific and Technologic Development Program of Shandong Province) | ||||
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