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含MgO-Lu2O3-Re2O3三元添加剂Si3N4陶瓷摩擦磨损性能的研究

Qiang-guo JIANG,Shang-xian GU,Wei LIU,Mao-peng ZHOU,Wei-ming GUO,Shang-hua WU

Journal of Synthetic Crystals（2015）

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Abstract
利用球盘式摩擦磨损试验机,研究了含MgO-Lu2O3-Re2O3(La2O3,Sm2O3,Gd2O3,Er2O3)三元添加剂Si3 N4陶瓷的摩擦磨损性能.结果表明:机械磨损和摩擦化学反应为主要磨损机理.在三元添加剂中,随着第二稀土离子Re3+半径的增加,粘附层增加,Si3N4摩擦系数降低.基于横向断裂理论模型,Si3N4陶瓷单位磨损率随着1/(KB1/2H5/8)的增加而增加,其中含有第二相Lu4Si2N2O7的样品SN-LuSm和SN-LuEr优于此线性关系,表现出更好的抗磨损性能.
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Key words
Si3N4,ternary additive,friction and wear,lateral-crack chipping model
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