Microstructure and Mechanical Properties of Fe-based Amorphous Composite Coatings Reinforced by Stainless Steel Powders

被引：46
作者：
Zhou, H. [1 ]
Zhang, C. [1 ]
Wang, W. [1 ]
Yasir, M. [1 ]
Liu, L. [1 ,2 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
[2] Huazhong Univ Sci & Technol, Res Inst Shenzhen, Shenzhen 518057, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2015年 / 31卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Thermal spraying; Fe-based amorphous coating; Stainless steel; Bonding strength; Ductility; BULK METALLIC-GLASS; TRIBOLOGICAL BEHAVIOR; CORROSION-RESISTANCE; STRENGTH;
D O I：
10.1016/j.jmst.2014.09.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, a few Fe-based amorphous matrix composite coatings reinforced with various portions (4, 8 and 16 vol.%) of 316L stainless steel powders have been successfully produced through high velocity oxy-fuel (HVOF) spraying. The microstructure of the composite coatings was systematically characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The main structure of composite coatings remained amorphous while 316L stainless steel splats were distributed homogeneously in the amorphous matrix and well connected with surrounding amorphous phase. Bonding strength of coatings to the substrate was determined by "pull-off" tensile tests. The results revealed that the 316L stainless steel phase effectively improved the bonding strength of amorphous coatings, which is mainly contributed by the strong metallurgical bonding between stainless steel and amorphous splats. The addition of 316L stainless steel also enhanced the ductility and fracture resistance of the coatings due to the ductile stainless steel phases, which can arrest crack propagation and increase energy dissipation.
引用
收藏
页码：43 / 47
页数：5
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