原位成型微织构自润滑陶瓷材料的制备及其性能研究

发布时间：2018-05-25 19:28

本文选题：表面织构 + 原位成型　；参考：《工具技术》2017年05期

【摘要】：表面织构具有改善表面润滑状态和减摩抗磨的作用,在工程领域的应用也越来越广。现有的微织构加工方法很多,但成本较高,且加工周期长。本试验提出了原位成型的加工方法,以石墨为微织构凸模,设计、加工了沟槽型微织构,经热压烧结工艺将微织构置入到陶瓷粉体中,原位成型表面微织构陶瓷材料。对所得材料进行力学性能测试和摩擦磨损试验,用扫描电镜(SEM)观察裂纹、断面形貌以及磨损表面。结果表明:沟槽型织构材料的断裂韧性和抗弯强度分别为7.4MPa·m~(1/2)和504.8MPa,比无织构材料分别提高了约0.4%和12.3%;沟槽型织构试样摩擦系数较为平稳,且与无织构试样相比,最大摩擦系数和最小摩擦系数分别减少了约33.3%和18.2%;沟槽型织构试样的磨损形式主要是磨粒磨损,无织构试样的磨损形式主要是粘结磨损。
[Abstract]:The surface texture has the function of improving the surface lubrication state and friction reducing and anti-wear, and is becoming more and more widely used in the field of engineering. There are many methods of micro texture processing, but the cost is high, and the processing cycle is long. The micro texture was placed into the ceramic powder by the sintering process, and the surface microtexture ceramic materials were in situ formed. The mechanical properties and friction and wear tests of the obtained materials were carried out. The cracks, cross section morphology and wear surface were observed by scanning electron microscopy (SEM). The results showed that the fracture toughness and bending strength of the groove texture materials were 7.4MPa m~ (1) respectively. /2 and 504.8MPa are about 0.4% and 12.3% higher than those without texture, and the friction coefficient of the grooved texture specimen is more stable, and the maximum friction coefficient and the minimum friction coefficient are reduced by about 33.3% and 18.2%, respectively. The wear form of the grooved texture specimen is mainly abrasive wear and the wear form of the non woven specimen. It is mainly bonded wear.
【作者单位】：齐鲁工业大学;
【基金】：山东省科技攻关计划项目(2013GGX10322)
【分类号】：TQ174.6

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