Influence of H 2 Flow Rate on Structure and Erosion Resistance of Thermal Barrier Coatings Prepared by Plasma Spray-Physical Vapor Deposition

被引：0
|
作者：
Liu F. [1 ,2 ]
Liu M. [2 ]
Mao J. [2 ]
Deng Z. [2 ]
Ma J. [2 ]
Deng C. [2 ]
Zeng D. [1 ]
机构：
[1] School of Materials Science and Engineering, South China University of Technology, Guangzhou
[2] Guangdong Institute of New Materials, National Engineering Laboratory for Modern Materials Surface Engineering Technology, The Key Lab of Guangdong for Modern Surface Engineering Technology, Guangzhou
来源：
Liu, Min (liumin_gz@163.net) | 2018年 / Chinese Journal of Materials Research卷 / 32期
关键词：
Erosion resistance; Microstructure; Plasma spray-physical vapor deposition; Surface and interface in the materials; Thermal barrier coatings;
D O I：
10.11901/1005.3093.2017.347
中图分类号：
学科分类号：
摘要：
Different thermal barrier coatings (TBCs) of ZrO 2 -7%Y 2 O 3 (7YSZ) were prepared on high temperature alloy K417 by plasma spray- physical vapor deposition (PS-PVD) processes with changing H 2 flow rate for the plasma gas, while the influence of H 2 flow rate on the structure and erosion resistance of TBCs was investigated. Results show that the H 2 flow rate of plasma gas presents significantly influence on the surface topography, structure, porosity, hardness, and erosion resistance of the prepared PS-PVD TBCs. When the H 2 flow rate is 0, 5 and 10 SLPM (standard liter per minute) respectively, the corresponding TBCs present the following properties: 16.7%, 20.4% and 7.7% for porosity; 224.2 HV 0.025 , 236.6 HV 0.025 and 394.4 HV 0.025 for hardness; and 78.5 mg, 65.0 mg and 17.3 mg for mass loss after solid particles erosion test for 25 s. With the increase of H 2 flow rate, the porosity of PS-PVD TBCs increases at first and then decreases, while the hardness and erosion resistance increase. © All right reserved.
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页码：641 / 646
页数：5
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