Comparative investigation of microstructure and properties of Ni-coated FeSiAl soft magnetic composite coatings produced by cold spraying and HVOF

SURFACE & COATINGS TECHNOLOGY

卷:371

Article; Proceedings Paper

Xie, Xinliang^1,3  Chen, Chaoyue^1,2  Xie, Yingchun⁴  Aubry, Eric⁵  Ren, Zhongming²  Ji, Gang³  Liao, Hanlin¹ 

[1] Univ Bourgogne Franche Comte, CNRS, ICB, UTBM,UMR 6303, F-90010 Belfort, France

[2] Shanghai Univ, Sch Mat Sci & Engn, State Key Lab Adv Special Steels, Shanghai 200444, Peoples R China

[3] Univ Lille 1, CNRS, UMR 8207, Unite Mat & Transformat, F-59655 Villeneuve Dascq, France

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

[5] Nipson Technol, 12 Ave Trois Chenes, F-90000 Belfort, France

关键词: Cold spraying;    HVOF;    Soft magnetic composites;    FeSiAl alloy;    Cladded powder;   

DOI  :  10.1016/j.surfcoat.2018.12.067

来源: Elsevier

【 摘 要 】

In this work, the techniques of cold spray (CS) and high velocity oxygen-fuel (HVOF) were employed to fabricate Ni/FeSiAl soft magnetic composite (SMC) coatings by using Ni-coated FeSiAl composite powder. The micro-structural features were characterized in terms of scanning electron microscope (SEM) and X-ray diffraction (XRD) analyses. The tribological and magnetic properties of the Ni/FeSiAl SMC coatings were also comparatively studied. Results showed that the CS coating exhibited higher particle deformation and much higher density, whereas the HVOF coating showed more visible defects and slightly higher oxide content. Both CS coating and HVOF coating resulted some loss of FeSiAl particles during deposition, while a higher content of FeSiAl particles was achieved in the HVOF composite coating, indicated a higher deposition efficiency of FeSiAl particles during HVOF deposition. According to the XRD analysis, both SMC coatings had no obvious oxidation and phase transformation during deposition processes. The EDS analysis proved partially melted particles during HVOF deposition. Tribological tests revealed a better wear performance of the CS coating as a result of the enhanced plastic deformation and microhardness. The HVOF coating showed a better magnetic performance, with a lower coercivity and a higher saturation magnetization compared to those of CS coating. This can be explained by a higher retainability of FeSiAl particles and a smaller strain stress generation during HVOF deposition.

【 授权许可】

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