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《China Surface Engineering》 2003-03
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Effect of Arc Power on the Microstructure of the TiO_2 Coatings Deposited by Plasma Spraying With Liquid Feedstock

HAN Feng,WANG Yu-yue,YANG Guan-jun,WANG Ze,LI Chang-jiu (Welding Research Institntc,School of Material Science & Engineering, Xian Jiaotong University, Xian710049 China)  
TiO2 coatings were deposited by plasma spraying with liquid feedstock at different arc powers. A ethanol solution of 20 % w(butyl titanate) was used as liquid feedstock. The deposited TiO2 coatings were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction analysis. The results showed that the coating presents nanostructure. The synthesized TiO2 coatings consisted of anatase TiO2 and rutile TiO2 according to XRD patterns. The content of anatase TiO2 in the coating reached more than 70 % and decreased with the increase of arc power. The TiO2 coatings showed a mean grain size from 20 nm to about 60 nm, and it increased with the increase of arc power as well.
【Fund】: 国家自然科学基金资助项目(No.50071044)
【CateGory Index】: TG174.4
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