金属基高温减摩耐磨复合涂层研究进展OA

Fabricating metal-matrix high-temperature friction-reducing and wear-resistant composite coatings on the surface of tribo-pairs represents an effective strategy to improve the service life,stability and reliability of mechanical components under high-temperature conditions,and has thus received extensive attention in the aerospace industry.This article provides a review of the advancements in metal-matrix high-temperature friction-reducing and wear-resistant composite coatings,with emphasis on their performance requirements,compositional and structural design,typical coating systems,friction and wear mechanisms,and optimization methods.The coefficients of friction and wear rates of typical coatings across a temperature range from room temperature to 1000℃are summarized and analyzed,and the evolution of their wear mechanisms with increasing temperature is concluded:at low temperatures,abrasive grooving and adhesive transfer dominate;as temperature increases,the mechanism gradually shifts to oxidative delamination and the formation of a tribo-oxide layer.Currently,the design and optimization of the coatings mainly depend on empirical design and trial-and-error method through adjusting the compositions of hard phases and lubricating phases.In recent years,data-driven machine learning methods have emerged as a new direction for coating composition design and performance optimization.