The Influence of Structural Components of Diamond-Bearing Mineral Ceramic Abrasive Material on Its Cutting Ability and the Treated Surface Quality

Abstract

AbstractThe use of known mineral ceramic tool materials is limited by their weak resistance to cyclic temperature changes, low bending strength. The authors propose a new abrasive mineral ceramic material with dispersed diamonds enclosed in a corundum matrix frame. The research includes assessing the influence of the composite material structural components on its cutting ability, the tool relief roughness characteristics, and the treated surface quality. The volumetric cutting ability of diamond-bearing samples is consistently high, exceeds the comparable traditional materials by 1.3–3 times, and increases nonlinearly with an increase in diamond grit. An increase in the diamond concentration in the abrasive material slightly reduces the grinding rate. The working surface morphology of a diamond-bearing abrasive tool does not change during operation. The ceramic matrix does not have wear marks, diamonds protrude significantly above the matrix surface, and the tool cutting surface retains the correct geometric shape. Abrasive tools made of the proposed material have good diamond retention, heat resistance, and goes into a self-sharpening mode during operation. It is found that the treated surface roughness increases when using diamonds of larger fractions. With an increase in the diamond concentration in a mineral ceramic material tool, the surface profile parameter Ra of a workpiece does not decrease linearly. An empirical dependence of Ra parameter is proposed. Grinding modes have a lesser effect on the surface morphology of the part treated with the mineral ceramic tool compared to the tool characteristics. The research results will be used in the design of new abrasive materials.KeywordsDiamond-bearing ceramic materialAbrasive propertiesFrictionWearMineral ceramics