材料科学
摩擦学
热喷涂
陶瓷
涂层
摩擦系数
非阻塞I/O
冶金
复合材料
磨损系数
相(物质)
生物化学
化学
催化作用
有机化学
作者
Rohit Kumar Singh Gautam,Vivek Mani Tripathi,Jitendra Gautam,Pramod Jha,Sana Sahab,Rajnesh Tyagi,Hemant Nautiyal
标识
DOI:10.1016/j.surfcoat.2023.130041
摘要
In the present investigation the influence of solid lubricants (Ag, MoS2, and h-BN) addition on the friction and wear properties of Ni-based coatings were studied. The coatings were deposited using high velocity oxygen fuel (HVOF) route with fixed concentration (10 wt%) of MoS2 and Ag while varying the weight percentages (0, 5, 7.5, and 10 wt%) of h-BN. However, the hardness of the coated samples was observed to decrease from 403 HV0.3 to 380 HV0.3 for 5 wt% h-BN, whereas it declined to 365 HV0.3 and 310 HV0.3 corresponding to the samples with 7.5 and 10 wt% of h-BN. Further, the tribological properties of coated specimens against Al2O3 ball were explored from room temperature (RT) to 800 °C. Commercial Al2O3 ceramic ball with diameter 6 mm was used as the counterpart. The friction coefficient and wear rate were observed to decrease with rise in temperature, particularly the coefficient of friction (COF) for the coated sample (7.5 wt% h-BN) dropped from 0.5 to 0.15. Moreover, the coating with 7.5 wt% h-BN showed the best tribological behavior tested under the aforesaid conditions. The favorable tribological properties of the coatings were explained and linked to the observed behavior on the basis of the combined effect of NiO, AgMoxOy, Ag, MoS2 and optimal concentration of h-BN.
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