Effect of heat treatment and synergistic rare-earth modified NiCrAlY on bonding strength of nanostructured 8YSZ coatings

被引：23

作者：

Zhou, Feifei ^{[1
,2
,3
]}

Zhang, Zhenguo ^{[1
]}

Liu, Saiyue ^{[1
]}

Wang, Lan ^{[1
]}

Jia, Jin ^{[1
]}

Wang, You ^{[1
]}

Gong, Xue ^{[1
]}

Gou, Junfeng ^{[1
]}

Deng, Chunming ^{[2
,3
]}

Liu, Min ^{[2
,3
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Dept Mat Sci, Harbin 150001, Heilongjiang, Peoples R China

[2] Guangdong Inst New Mat, Natl Engn Lab Modern Mat Surface Engn Technol, Guangzhou 510651, Guangdong, Peoples R China

[3] Guangdong Inst New Mat, Key Lab Guangdong Modern Surface Engn Technol, Guangzhou 510651, Guangdong, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2019年 / 480卷

基金：

中国国家自然科学基金;

关键词：

Bonding strength; Rare-earth modification; NiCrAlY; 8YSZ; Heat treatment; THERMAL-BARRIER COATINGS; PHYSICAL PROPERTIES; ADHESION STRENGTH; MICROSTRUCTURE; CERAMICS; COATS; AIR;

D O I：

10.1016/j.apsusc.2019.02.247

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, the nanostructured 8YSZ coatings and two kinds of bond coatings including NiCrAlY and NiCrAlYCe coatings were deposited by atmospheric plasma spraying onto nickel-based superalloys. The microstructure of as-sprayed coatings and the effect of heat treatment on bonding strength of NiCrAlY/8YSZ and NiCrAlYCe/8YSZ coatings were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), together with energy dispersive spectrum (EDS) and X-ray diffraction (XRD) analysis. The results indicate that the coatings exhibit typical bi-modal microstructure and the grain size of 8YSZ coatings keeps nanostructure. As for 8YSZ coatings, the phase transformation occurs from t phase to t' phase during plasma spraying and the heat treatment does not change the phase structure. The heat treatment and rare-earth modified NiCrAlY coatings play an important role in enhancing the bonding strength of as-sprayed coatings significantly compared with NiCrAlY/8YSZ coatings. The bonding strength of NiCrAlYCe/8YSZ coatings whose temperature of the heat treatment is 800 degrees C @ 6 h can reach 48.9 MPa, which is 1.5 times than that of as-sprayed NiCrAlYCe/8YSZ coatings.

引用

页码：636 / 645

页数：10

共 35 条

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