Theoretical and experimental evaluation of the properties of antifriction diamond-containing ceramics in a wide range of loads

One area of creating innovative friction units is the use of ceramic elements as parts that are involved in direct frictional contact. Ex-isting studies emphasize the complexity of forming oxide mineral-ceramic diamond-containing materials due to the diamond's sensi-tivity to oxidation at relatively high temperatures. The purpose of this study is to evaluate the properties of antifriction diamond-containing ceramics in a wide range of loads. During this study, a composite diamond-containing ceramic material was obtained, and a technology was presented, according to which, at the first stage of obtaining the material, a workpiece of dispersed aluminum and diamond is sintered, and then its surface layer is modified by the method of microplasma electrolytic oxidation. The formed part combines the physical and mechanical properties of the aluminum matrix, the base, with the tribological properties of the ceramic-hardened layer containing partially graphitized dispersed diamonds. As a result of the study, a positive example of using a friction pair of diamond-containing ceramic material – ceramics as a working unit of a colloid mill (disperser) was obtained. The developed model allows synthesizing diamond-containing ceramic materials with specified tribotechnical properties. The results of the modeling will allow for a preliminary estimate of the area of stable operation of tribounits, based on the value of contact pressure, before conduct-ing expensive full-scale tests.