Abstract Silicon nitride based ceramic tools have been successfully applied in high speed machining of nickel-based alloys. In this study, three silicon nitride material systems with different intergranular glassy phase contents were used to study the tribological behavior of silicon nitride in dry sliding against Inconel 718 in order to evaluate their potential suitability as cutting tool materials. The tribological properties at sliding velocities ranging from 1 m/s to 20 m/s were investigated. The mechanical and microstructural properties of the ceramics were considered, and the wear mechanisms were analyzed. The results showed that the wear of the ceramics has a positive correlation with hardness for sliding velocities below 5 m/s. With increasing sliding velocity, a tribochemical layer consisting of an oxide layer and a diffusion layer forms at the interface, resulting in increasingly higher wear of the ceramic. The formation of a tribochemical layer showed a correlation with the amount of the intergranular glassy phase in the material; the higher its amount the more prone the silicon nitride ceramic was found to form a tribochemical layer.

中文翻译：

---

三种氮化硅陶瓷在较宽的速度范围内与 Inconel 718 干滑动接触的摩擦学行为

摘要 氮化硅基陶瓷刀具已成功应用于镍基合金的高速加工。在这项研究中，使用具有不同晶间玻璃相含量的三种氮化硅材料系统来研究氮化硅在干式滑动中对 Inconel 718 的摩擦学行为，以评估它们作为切削刀具材料的潜在适用性。研究了滑动速度范围从 1 m/s 到 20 m/s 时的摩擦学特性。考虑了陶瓷的力学性能和显微组织性能，分析了磨损机理。结果表明，当滑动速度低于 5 m/s 时，陶瓷的磨损与硬度呈正相关。随着滑动速度的增加，由氧化层和扩散层组成的摩擦化学层在界面处形成，导致陶瓷越来越高的磨损。摩擦化学层的形成与材料中晶间玻璃相的数量有关；其含量越高，发现氮化硅陶瓷越容易形成摩擦化学层。