Comparison of thermal insulation capability between conventional and nanostructured plasma sprayed YSZ coating on Ni₃Al substrates

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• 作者：Dan Chen ; ^{cd1990@mail.nwpu.edu.cn} ; Fa Luo ; Xufei Lou ; Yuchang Qing ; Wancheng Zhou ; Dongmei Zhu
• 关键词：Thermal barrier coating ; Yttria-stabilized zirconia ; Ni3Al substrates ; Thermal insulation capability ; Plasma spraying
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 April 2017
• 年：2017
• 卷：43
• 期：5
• 页码：4324-4329
• 全文大小：2378 K
• 卷排序：43

文摘

Conventional and nanostructured yttria-stabilized zirconia(YSZ) as thermal barrier coatings were directly deposited on Ni3Al intermetallic compound substrates without bond coating by atmospheric plasma spraying. The adherence, thermal insulation capability, microstructure, porosity and sintering resistance of these two kinds of coatings were studied. For the thickness of 150 µm YSZ coating without bond coating, the temperature drop (∆T=98 ℃) of the nanostructured YSZ coating at 1200 ℃ increases by 50.8% compared with that of the conventional YSZ coating (∆T=65 ℃). It is shown that the nanostructured YSZ coating has higher thermal insulation capability than the conventional YSZ coating, which is mainly due to its special microstructure with more semi-molten particles (21.78±0.54%), higher porosity (8.81±0.35%) and better sintering resistance.