The Investigated Microstructure and Mechanical Properties of Al2O3/20wt% TiO2 Nanocomposite Coating

被引：0
|
作者：
Dejang, Nuchjira [1 ]
Watcharapasorn, Anucha [1 ]
Wirojupatump, Sittichai [2 ]
Hannula, Simo-Pekka [3 ]
Jiansirisomboon, Sukanda [1 ]
机构：
[1] Chiang Mai Univ, Dept Phys & Mat Sci, Fac Sci, Chiang Mai, Thailand
[2] Chiang Mai Univ, Fac Sci, Dept Phys, Chiang Mai, Thailand
[3] Aalto Univ, Dept Mat Sci & Engn, Helsinki, Finland
来源：
ADVANCES IN SUPERALLOYS, PTS 1 AND 2 | 2011年 / 146-147卷
关键词：
Al2O3/TiO2; Al2TiO5; plasma spray; fracture toughness; wear;
D O I：
10.4028/www.scientific.net/AMR.146-147.641
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The incorporation of nano-size TiO2 particles can significantly enhance the microstructure and mechanic properties of Al2O3 coating. Phase transformation from mainly stable alpha-Al2O3 and anatase-TiO2 in the powders to predominant metastable gamma-Al2O3 and rutile-TiO2 in the coatings was observed. Reaction between Al2O3 and TiO, phase also occurred producing new phase Al2TiO5 phase. Microstructural investigation showed that well separated TiO, lamellas were homogeneously dispersed between Al2O3 lamellas. It was found that the plasma-sprayed composite coating possessed better wear resistance than that of monolithic Al2O3 coating. The addition of TiO2 was found to improve friction coefficient, wear resistance and fracture toughness.
引用
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页码：641 / +
页数：2
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