Friction and Wear Behavior of Ni-SiC Composite Coating Prepared on TA15 Alloy

doi:10.15541/jim20150350

Abstract

Abstract:

Ni-SiC composite coatings were prepared on TA15 alloy by composite electroplating technology. The effects of the coating on friction and wear behavior of the substrate were investigated. The results show that the obtained coating is dense and compact, and possesses higher micro-hardness than the substrate. The coatings have superior friction and wear resistance than the substrate, as the mass losses of the coatings are much lower than those of the substrate under the same sliding conditions. The main wear mechanisms of the substrate sliding against both GCr15 and Al₂O₃ balls can be concluded as plough wear, adhesive wear accompanied by minor oxidation and abrasive wear. The main wear mechanisms of the Ni-SiC composite coating sliding against GCr15 ball can be set as extractions of the coating tissues and swear of the GCr15 ball on the coating surface, while the predoninate wear mechanisms of the coating sliding against Al₂O₃ ball could be fatigue wear and delamination abrasion.

Key words: TA15 alloy, Ni-SiC composite coating, friction and wear, wear mechanisms

CLC Number:

TQ174

GUO Wen, MI Guo-Ji, ZHANG Jin-Long, WANG Zhen-Ya. Friction and Wear Behavior of Ni-SiC Composite Coating Prepared on TA15 Alloy[J]. Journal of Inorganic Materials, 2016, 31(2): 195-200.

Figures/Tables 7

Fig. 1 Surface and cross-sectional BSE images of Ni-SiC composite coating after electroplating for 30 min (a) Surface morphologies; (b) Cross-sectional morphology

Fig. 2 XRD pattern conducted on the surface of the Ni-SiC composite coating after electroplating for 30 min

Fig. 3 Micro-hardness distribution profile of the Ni-SiC composite coating from its surface to substrate

Fig. 4 Friction coefficients of the base alloy and the Ni-SiC composite coating sliding against (a) GCr15 ball and (b) Al2O3 ball

Fig. 5 Mass losses of the base alloy and Ni-SiC composite coating after sliding against GCr15 and Al2O3 balls for 60 min, under the load of 300 g

Fig. 6 Wear morphologies of (a, b) base alloy and (c, d) the Ni-SiC composite coating after sliding against GCr15 ball for 60 min

Fig. 7 Wear morphologies of (a, b) base alloy and (c, d) Ni-SiC composite coating after sliding against Al2O3 ball for 60 min

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