摩擦学
材料科学
热喷涂
涂层
分层(地质)
脆性
微观结构
复合材料
大气压等离子体
韧性
耐磨性
冶金
断裂韧性
等离子体
物理
古生物学
生物
构造学
量子力学
俯冲
作者
Zhe Geng,Shuhua Hou,Gao-Lian Shi,Deli Duan,Li Shu
标识
DOI:10.1016/j.triboint.2016.08.025
摘要
Tribological performance of WC-12Co coatings prepared via air plasma spraying (APS), low-pressure plasma spraying (LPPS) and high-velocity air-fuel spraying (HVAF) at temperatures ranging from room temperature (RT, ~25 °C) to 650 °C was investigated. Relationships between the microstructure and tribological behaviour of coatings were discussed. Results show that the plasma-sprayed coatings exhibited more brittle phases, pores and microcracks, which provided the coatings with low hardness, toughness and oxidation resistance, promoted the coating splat delamination during friction and consequently led to the high wear rate. The HVAF coating had fewer brittle phases, fewer pores and more WC particles, which improved the mechanical properties and oxidation resistance, avoided the coating splat delamination, promoted CoWO4 formation and consequently exhibited the better wear resistance.
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