Synergistic effect of “double pores” texture on tribological properties of AZ31 Mg alloy micro-arc oxide ceramic coatings

Effect of Treatment with Microarc Oxidation Technology on Tribological Properties of Nonvalve Metal Low-Carbon Steel

“…The low-carbon steel sample that has undergone MAO undergoes the same friction process. , In the initial stage, the coating formed by the MAO is hard compared to the friction sub, so the friction sub is worn through, and abrasive particles are formed. In the middle stage, it is a grinding process, but the fluctuation is small because the porous structure of the sample surface is able to accommodate some of the abrasive particles . After a period of grinding, a stable friction coefficient of 0.43 is formed.…”

“…In the middle stage, it is a grinding process, but the fluctuation is small because the porous structure of the sample surface is able to accommodate some of the abrasive particles. 17 After a period of grinding, a stable friction coefficient of 0.43 is formed. Figure 3b shows the average COF obtained from the sample after friction.…”

“…15 Wang et al conducted MAO on Al, 16 while Yang et al performed the same process on Mg alloy. 17 Similarly, Wu and Fu separately conducted MAO on Ti alloy and Zr alloy. 18−21 This technology is widely recognized by academics.…”

“…MAO is the process of modifying the surface of valve metals, such as aluminum (Al), magnesium (Mg), titanium (Ti), and zirconium (Zr) . Wang et al conducted MAO on Al, while Yang et al performed the same process on Mg alloy . Similarly, Wu and Fu separately conducted MAO on Ti alloy and Zr alloy. − This technology is widely recognized by academics.…”

Reduced Graphene Oxide Films to Enhance the Tribological Performance of Micro-arc Oxidation Coatings

“…Friction plays a key role in the operation of mechanical systems, and more than 23% of the world’s energy consumption is directly related to friction, leading to the failure of most components due to friction-induced wear. , To improve the tribological performance of various components, researchers have proposed various coating preparation methods. Among these methods, microarc oxidation (MAO), a process that applies high voltages to metal surfaces and prepares ceramic coatings in an electrolyte environment, , has made significant progress in improving the surface properties of valve metals (e.g., aluminum (Al), − magnesium (Mg), , and titanium (Ti)). The strong, dense, tribological, and corrosion-resistant properties of ceramic coatings produced by MAO technology have attracted considerable academic and industrial attention.…”