Abrasion resistance of titanium-based biofunctionalised oxide ceramic coatings

<ns0:p>The requirements of modern production for details are very high. Particular attention is paid to the friction resistance parts that work in the friction mechanism. Titanium alloys are characterised by low wear resistance and have the ability to stick to the surface of the body of greater hardness. Therefore, applying wearresistant coatings to the surface of titanium alloys is relevant. The purpose of this work was to increase the operational properties of titanium alloys by creating protective coatings on their surface. The work investigated the wear resistance of plasma electrolyte oxidised coatings on titanium alloy. Experimental studies revealed that the coatings have different oxides (stoichiometric and non-stoichiometric) in their structure. Nonstoichiometric oxides are characterised by low physical and mechanical properties and settle in the pores after primary wear. In the process of wear, a non-stoichiometric oxide serves as a lubricant. This has a positive effect on their tribological properties. It has been established that applying a coating to the surface of a titanium alloy increases the abrasion resistance by 10 times. The interface between the metal base and the coating is uneven, which is achieved due to the melting of the surface of the titanium alloy during PEO. This feature demonstrates the high adhesion properties of coatings formed by the PEO method to the titanium base. The paper established the dependence of the size and shape of the pores on the working modes. It was found that the size of the pores on the surface of the coating is 10...70 µm, and high internal porosity of the coating material was established. It was found that porous coatings melt internally, so the porosity is open, not through. The studied property of the coatings can help in implantology, since the connection of muscle tissue with the implant occurs without the formation of a capsule</ns0:p>