Abstract

Ceramic matrix composites based on cubic boron nitride with a TaC binder phase are sintered under conditions of high pressure and high temperature. The sintering is carried out in a high-pressure apparatus of the toroid type in the temperature range of 1450–2450°C. It is shown that a chemical reaction between components of the mixture with the formation of TaB₂ takes place at a sintering temperature above 2150°C. The microhardness of the composites increases with an increase in the sintering temperature and reaches a maximum value (34 GPa) at 2150°C. The composites show high resistance to mechanochemical wear when used for high-speed machining of nickel-based alloy Inconel 718.

中文翻译：

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用TaC粘结剂烧结cBN基材料，用于切削工具应用

摘要

在高压和高温条件下烧结基于立方氮化硼和TaC粘结相的陶瓷基复合材料。烧结是在1450–2450°C的温度范围内的环形高压设备中进行的。结果表明，在高于2150℃的烧结温度下，混合物的组分之间发生了化学反应，形成了TaB ₂。复合材料的显微硬度随烧结温度的升高而增加，并在2150°C达到最大值（34 GPa）。当用于镍基合金Inconel 718的高速加工时，该复合材料对机械化学磨损具有很高的抵抗力。