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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >Friction and wear behaviors of Sialon-Si_3N_4 graded nano-composite ceramic materials in sliding wear tests and in cutting processes
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Friction and wear behaviors of Sialon-Si_3N_4 graded nano-composite ceramic materials in sliding wear tests and in cutting processes

机译：Sialon-Si_3N_4梯度纳米复合陶瓷材料在滑动磨损试验和切削过程中的摩擦磨损性能

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摘要

Sialon-Si_3N_4 graded nano-composite ceramic materials were fabricated by hot-pressing. Sliding wear tests against Inconel 718 were conducted on these graded ceramic composites using the pin-on-disk method. The friction coefficient and the wear rate were measured. The tribological and wear behaviors were discussed in relation to its mechanical properties and microstructure. The results showed that the graded material exhibits good mechanical properties which were attributed to its synergistic strengthening and toughening mechanisms induced by the graded compositional structure and the addition of nano-sized particles. The friction coefficient and the wear rate of the reference material were higher than those of the graded material. Both the friction coefficient and the wear rate of the composites decreased with the increase of the sliding speed. The wear mechanisms of the composites were adhesion, chipping and abrasion in sliding wear tests. The cutting performance and wear mechanisms of the graded tools were also investigated via turning of Inconel 718. The graded tools showed better cutting performance compared to the homogeneous ones, as a result of their enhanced mechanical properties, higher abrasion and fracture resistance. The main wear mechanisms in the machining tests were adhesion, abrasion and flaking.
机译：通过热压制备了Sialon-Si_3N_4级纳米复合陶瓷材料。使用销盘法对这些渐变陶瓷复合材料进行了针对Inconel 718的滑动磨损测试。测量了摩擦系数和磨损率。讨论了其力学性能和微观结构的摩擦学和磨损行为。结果表明，该梯度材料表现出良好的机械性能，这归因于其由梯度组成结构和纳米级颗粒的添加引起的协同强化和增韧机理。参考材料的摩擦系数和磨损率高于渐变材料。复合材料的摩擦系数和磨损率均随着滑动速度的增加而降低。在滑动磨损试验中，复合材料的磨损机理为附着力，碎裂和磨损。还通过车削Inconel 718来研究分级刀具的切削性能和磨损机理。与均质刀具相比，由于其增强的机械性能，更高的耐磨性和抗断裂性，该分级刀具显示出更好的切削性能。机加工测试中的主要磨损机理是粘附，磨损和剥落。

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