Electrodeposited Ni-W-TiC Composite Coatings: Effect of TiC Reinforcement on Microstructural and Tribological Properties

doi:10.1007/s40195-019-00996-y

Acta Metallurgica Sinica (English Letters) ›› 2020, Vol. 33 ›› Issue (4): 573-582.DOI: 10.1007/s40195-019-00996-y

收稿日期:2019-09-19 修回日期:2019-11-01 出版日期:2020-04-10 发布日期:2020-04-15

Electrodeposited Ni-W-TiC Composite Coatings: Effect of TiC Reinforcement on Microstructural and Tribological Properties

Jin Hyuk Choi¹, Gobinda Gyawali²(), Dhani Ram Dhakal³, Bhupendra Joshi², Soo Wohn Lee³

1 Department of Materials Metal Engineering, Sun Moon University, 31460, Asan, South Korea
2 Department of Fusion Science and Technology, Sun Moon University, Tangjeong Myeon, 31460, Asan, Chungnam, South Korea
3 Department of Environmental and Bio-Chemical Engineering, Sun Moon University, 31460, Asan, South Korea

Received:2019-09-19 Revised:2019-11-01 Online:2020-04-10 Published:2020-04-15
Contact: Gobinda Gyawali ggobinda@sunmoon.ac.kr

摘要/Abstract

Abstract:

Ni-W-TiC composite coatings were prepared via electrodeposition technique by dispersing the different amount of TiC particles into the plating bath. The Ni-W and Ni-W-TiC composite coatings containing different concentrations of TiC particles were characterized by using the scanning electron microscope, X-ray diffraction technique, Vickers microhardness test, surface roughness test, and tribology test. The results show that the Ni-W coatings containing reinforced TiC particles have shown a typical FCC Ni-W crystal structure with significantly higher Vickers microhardness. The amount of dispersed TiC particles into the plating bath considerably affected codeposition weight percent of TiC into the Ni-W matrix, as revealed by the EDS analysis. Ni-W-TiC samples demonstrated the decreased abrasive wear as compared to Ni-W coating and no characteristic features observed for the adhesive wear. Similarly, an improvement in coefficient of friction was observed in Ni-W-TiC composite coating as compared to Ni-W coating.

Key words: Ni-W alloy, Composite coating, Microhardness, Wear, Coefficient of friction

. [J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 573-582.

Jin Hyuk Choi, Gobinda Gyawali, Dhani Ram Dhakal, Bhupendra Joshi, Soo Wohn Lee. Electrodeposited Ni-W-TiC Composite Coatings: Effect of TiC Reinforcement on Microstructural and Tribological Properties[J]. Acta Metallurgica Sinica (English Letters), 2020, 33(4): 573-582.

图/表 11

Table 1 Experimental bath formulation, concentration, and plating condition

Fig. 1 SEM images of the surface morphologies of a Ni-W, b Ni-W-TiC5, c Ni-W-TiC10, d Ni-W-TiC15, e Ni-W-TiC20 coatings, and f TiC powder

Fig. 2 Variation of surface roughness of Ni-W and Ni-W-TiC composite coatings

Fig. 3 EDS element mapping and spectrum of Ni-W-TiC20 sample

Fig. 4 X-ray diffraction patterns of a Ni-W-TiC coatings, b TiC powder; SEM cross-sectional images of c Ni-W, d Ni-W-TiC20 coatings

Fig. 5 Variation of a Vickers microhardness, b grain size, c weight percent of TiC codeposition, d W content in Ni-W and Ni-W-TiC coatings

Fig. 6 Coefficients of friction of Ni-W and Ni-W-TiC coatings obtained during the wear test

Fig. 7 SEM images of the worn-out surfaces of a Ni-W, b Ni-W-TiC5, c Ni-W-TiC10, d Ni-W-TiC15, e Ni-W-TiC20 coatings; f EDS spectrum of the worn surface of Ni-W-TiC20 sample

Fig. 8 Wear track width/depth profiles of Ni-W and Ni-W-TiC coatings

Fig. 9 Wear rates of Ni-W and Ni-W-TiC coatings

Fig. 10 Variation of the coefficient of friction of Ni-W-TiC20 sample under a load variation, b sliding speed variation

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Electrodeposited Ni-W-TiC Composite Coatings: Effect of TiC Reinforcement on Microstructural and Tribological Properties

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