Open Access Conference Proceedings

<div>This work deals with the increase in mechanical and utility properties of diamond grinding wheel with controlled porosity prepared by the sintering along the diamond grain boundary using binder material based on Cu-Sn-Ti alloy with subsequent hot isostatic pressing (HIP). The structure of diamond grinding wheel contained after sintering a large proportion of open porosity (35 to 39 %), which ensures a very good supply of coolant to the grinding point and at the same time removes the ground material from the grinding point. The effect of HIP on the structural characteristics, phase and chemical composition by SEM/EDX and XRD were studied in detail. The samples before and after HIP were subjected to the three-point bending test and the Vickers hardness test, which are the most important from the point of view of potential applications. The process of hot isostatic pressing led to the densification of necks formed between diamonds grains and to significant increase in the bending strength. The titanium-rich phases formed a shell around the diamond grains, improving their anchoring in the metal matrix. The grinding wheel showed very good utility properties that allow it to be used for long-term grinding with low resistance while maintaining shape stability during grinding.</div>

Keywords: Hot isostatic pressing, mechanical properties, Cu-Sn-Ti alloy, diamond tools

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