H<sub>2</sub>对等离子喷涂-物理气相沉积热障涂层的结构和抗冲刷性能的影响

doi:10.11901/1005.3093.2017.347

材料研究学报

2018, Vol. 32

Issue (9): 641-646 DOI: 10.11901/1005.3093.2017.347

本期目录 | 过刊浏览

H₂对等离子喷涂-物理气相沉积热障涂层的结构和抗冲刷性能的影响

刘飞^1,², 刘敏²(

), 毛杰², 邓子谦², 马景涛², 邓畅光², 曾德长¹

1 华南理工大学材料科学与工程学院广州 510640
2 广东省新材料研究所现代材料表面工程技术国家工程实验室广东省现代表面工程技术重点实验室广州 510651

Influence of H₂ Flow Rate on Structure and Erosion Resistance of Thermal Barrier Coatings Prepared by Plasma Spray-Physical Vapor Deposition

Fei LIU^1,², Min LIU²(

), Jie MAO², Ziqian DENG², Jingtao MA², Changguang DENG², Dechang ZENG¹

1 School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
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 510651, China

引用本文:

刘飞, 刘敏, 毛杰, 邓子谦, 马景涛, 邓畅光, 曾德长. H₂对等离子喷涂-物理气相沉积热障涂层的结构和抗冲刷性能的影响[J]. 材料研究学报, 2018, 32(9): 641-646.
Fei LIU, Min LIU, Jie MAO, Ziqian DENG, Jingtao MA, Changguang DENG, Dechang ZENG. Influence of H₂ Flow Rate on Structure and Erosion Resistance of Thermal Barrier Coatings Prepared by Plasma Spray-Physical Vapor Deposition[J]. Chinese Journal of Materials Research, 2018, 32(9): 641-646.

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摘要:

改变用等离子喷涂-物理气相沉积(PS-PVD)工艺制备热障涂层时等离子工作气体中H₂组分的流量,制备出不同的ZrO₂-7%Y₂O₃(7YSZ)热障涂层并研究了H₂对PS-PVD热障涂层的影响。结果表明：等离子工作气体中的H₂对PS-PVD热障涂层的表面形貌、微观结构、孔隙率、硬度和抗冲蚀性能等性质有显著的影响。H₂流量分别为0、5、10 SLPM时制备的PS-PVD热障涂层,其孔隙率分别为16.7%、20.4%、7.7%;显微硬度分别为224.2 HV_0.025、236.6 HV_0.025、394.4 HV_0.025;固体颗粒冲蚀25 s后的失重量分别为78.5 mg、65.0 mg、17.3 mg。随着H₂组分流量的增大热障涂层的孔隙率先增加后减小,柱状结构逐渐变化,硬度和抗冲蚀性能提高。

关键词 ：材料表面与界面, 热障涂层, 等离子喷涂-物理气相沉积, 抗冲蚀性能, 微观结构

Abstract：

Different thermal barrier coatings (TBCs) of ZrO₂-7%Y₂O₃ (7YSZ) were prepared on high temperature alloy K417 by plasma spray-physical vapor deposition (PS-PVD) processes with changing H₂ flow rate for the plasma gas, while the influence of H₂ flow rate on the structure and erosion resistance of TBCs was investigated. Results show that the H₂ 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 H₂ 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 H₂ flow rate, the porosity of PS-PVD TBCs increases at first and then decreases, while the hardness and erosion resistance increase.

Key words： surface and interface in the materials thermal barrier coatings plasma spray-physical vapor deposition erosion resistance microstructure

收稿日期: 2017-08-02

ZTFLH:

TG174

基金资助:广州市对外合作项目(201508030001),广东省引进创新科研团队计划(2011C007),广东省自然科学基金研究团队项目(2016A030312015),广东省科学院实施创新驱动发展能力建设专项(2017GDAS CX-202)

作者简介:

作者简介刘飞,男,1993年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2017.347 或 https://www.cjmr.org/CN/Y2018/V32/I9/641

表1 喷涂工艺参数

图1 气体喷砂冲蚀试验机的示意图

图2 冲刷前后试样的表面形貌

图3 涂层的截面形貌

图4 涂层截面的显微硬度

图5 固体颗粒冲蚀试样的失重

图6 喷距1 m位置等离子射流中径向粒子分布密度[13]

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