Effect of heat treatment temperature on microstructure of sol-gel derived wollastonite coating

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作者：
机构：
[1] Bao, Quanhe
[2] Liu, Jiakuo
来源：
Bao, Q. (quanhebao@126.com) | 1600年 / Trans Tech Publications Ltd卷 / 14期
关键词：
Silicate minerals - Titanium alloys - Coatings - Heat treatment - Sol-gel process - Sol-gels;
D O I：
10.4028/www.scientific.net/JBBTE.14.75
中图分类号：
学科分类号：
摘要：
Wollastonite coatings on titanium alloys substrates were prepared by sol-gel with different heat treatment temperatures. Microstructures of the specimens were analyzed by XRD. SEM was used to observe surface morphologies of wollastonite coatings. The results show that with the heat treatment temperature increasing, the amorphous coating transforms to a crystalline coating. There are many pores in coatings prepared by sol-gel when heat treatment temperature higher than 900°C with the PH value to 2.5. There are no cracks in coating under such conditions. © 2012 Trans Tech Publications, Switzerland.
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