Abstract Alumina-based ceramic tools have been successfully applied in high-speed turning of superalloys. In this study, the tribological characteristics of a novel Al2O3-SiCw-TiCn ceramic composite were investigated in unlubricated sliding contact against laser-heated (600 °C) and unheated Inconel 718 between 2.5 m/s and 10 m/s. The tribological behavior of the Al2O3-SiCw-TiCn ceramic was compared to a commercial Al2O3-SiCw ceramic. The results indicated similar coefficients of friction (COF) in laser-heated and unheated tests. Below 7.5 m/s, the wear mechanisms in laser-heated tests were brittle fracture, plastic flow and adhesive wear and predominantly brittle fracture in unheated tests. A tribochemical layer mainly containing chromium and oxygen has formed on the contact surface at 10 m/s resulting in lowering the COF and reducing wear.

中文翻译：

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氧化铝基复合材料与激光加热和未加热 Inconel 718 干滑动接触的摩擦学特性

摘要 氧化铝基陶瓷刀具已成功应用于高温合金的高速车削。在这项研究中，研究了新型 Al2O3-SiCw-TiCn 陶瓷复合材料在无润滑滑动接触中对激光加热 (600 °C) 和未加热 Inconel 718 2.5 m/s 和 10 m/s 之间的摩擦学特性。将 Al2O3-SiCw-TiCn 陶瓷的摩擦学行为与商业化的 Al2O3-SiCw 陶瓷进行了比较。结果表明在激光加热和未加热测试中摩擦系数 (COF) 相似。低于 7.5 m/s，激光加热试验中的磨损机制是脆性断裂、塑性流动和粘附磨损，未加热试验中主要是脆性断裂。以 10 m/s 的速度在接触面上形成主要含有铬和氧的摩擦化学层，从而降低了 COF 并减少了磨损。