On the bonding strength in thermally sprayed Fe-based amorphous coatings

被引：76

作者：

Peng, Y. ^{[1
]}

Zhang, C. ^{[1
]}

Zhou, H. ^{[1
]}

Liu, L. ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, Res Inst Shenzhen, Wuhan 430074, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2013年 / 218卷

关键词：

Thermal spraying; HVOF; Fe-based amorphous coating; Bonding strength; RESIDUAL-STRESSES; CORROSION-RESISTANCE; ADHESION STRENGTH; HVOF; VELOCITY; MICROSTRUCTURE; TEMPERATURE; BEHAVIOR; POWDERS; IMPACT;

D O I：

10.1016/j.surfcoat.2012.12.018

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Bonding strength is one of the most important properties in thermally sprayed coatings as it plays crucial roles in the performance and lifetime of the coatings. This study aims to explore different factors that affect the bonding strength of the Fe48Mo14Cr15Y2O15B6 amorphous coating prepared by high velocity oxygen fuel (HVOF) thermal spraying. The results demonstrate that the substrate roughness and the coating thickness have significant influence on the bonding strength of the amorphous coating, e.g. the bonding strength increases when the substrate roughness is above a certain threshold, and decreases with the increasing coating thickness. In addition, the bond strength can be effectively enhanced via the addition of an intermediate NiCrAl layer between the substrate and the amorphous coating due to the occurrence of metallurgical reaction and the improved interfacial structure. Finally, the fracture mechanism of the coatings was also discussed. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：17 / 22

页数：6

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