Effect on microstructure of TiO2 rate in Al2O3-TiO2 composite coating produced using plasma spray method

被引：0
作者：
Islak, S. [1 ]
Buytoz, S. [2 ]
Ersoz, E. [2 ]
Orhan, N. [2 ]
Stokes, J. [3 ]
Hashmi, M. Saleem [3 ]
Somunkiran, I. [2 ]
Tosun, N. [2 ]
机构：
[1] Kastamonu Univ, Cide Rifat Ilgaz Vocat High Sch, TR-37600 Kastamonu, Turkey
[2] Firat Univ, Fac Technol, TR-23119 Elazig, Turkey
[3] Dublin City Univ, Sch Mech & Mfg Engn, Dublin, Ireland
来源：
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS | 2012年 / 6卷 / 9-10期
关键词：
Plasma spray; Ceramic coating; gamma-Al2O3; Rutile-TiO2; ALUMINA-TITANIA COATINGS; WEAR BEHAVIOR; LAMELLAR MICROSTRUCTURE; CERAMIC COATINGS; WT.PERCENT TIO2; PARAMETERS; PERFORMANCE; RESISTANCE; FLAME; APS;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, Al2O3-TiO2 composite coatings were thermally sprayed on the SAE 1040 steel using atmospheric plasma spray (APS) process of mixed different rates micron sized TiO2 and micron-sized Al2O3 powders. The effects of TiO2 addition on the microstructure, phase compositions and microhardness of the coatings were investigated by using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and microhardness tester. The results show that the Al2O3-TiO2 composite coatings consists of both fully melted regions and partially melted regions, and the fully melted region has a lamellar-like structure. Phase transformations from mainly stable alpha-Al2O3 and anatase-TiO2 in the powders to predominant metastable gamma-Al2O3, rutile-TiO2 and Al2TiO5 phase in the Al2O3-TiO2 composite coatings were observed. It was determined that the pore content decreased with the increased in the TiO2 powder rate. The microhardness of the coating layers was 3-4.5 times higher than substrate material. The average microhardness values of the coatings were found to reach 650-860 HV.
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页码：844 / 849
页数：6
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