| 氮化硅在水和乙醇中的摩擦化学机理研究 |
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| 引用本文： | 魏建军,薛群基. 氮化硅在水和乙醇中的摩擦化学机理研究[J]. 硅酸盐学报, 1993, 0(2) |
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| 作者姓名： | 魏建军 薛群基 |
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| 作者单位： | 兰州化学物理研究所，中国科学院兰州化学物理研究所固体润滑开放研究实验室 兰州 730000 |
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| 摘 要： | 在往复试验机上考察了Si_3N_4在干摩,水和乙醇润滑条件下的摩擦磨损性能,用SEM,XRD和XPS研究了Si_3N_4在水和醇中的摩擦化学反应机理。结果表明,Si_3N_4的摩擦系数和磨损体积随润滑环境的不同有如下顺序:干摩擦>水润滑>乙醇润滑。Si_3N_4在水中的摩擦化学机理涉及两个方面,一是Si_3N_4与水直接反应生成SiO_2;二是Si_3N_4与溶于水中的氧反应生成无定形Si-O化合物。Si_3N_4在醇中的摩擦化学机理为:Si_3N_4先与乙醇反应生成SiO_2,部分SiO_2与乙醇进一步反应生成硅酯。
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| 关 键 词： | 氮化硅 水和乙醇 摩擦磨损性能 摩擦化学机理 |
fRIBOCHEMICAL MECHANISM OF SILICON NITRIDE WITH WATER AND ETHANOL LUBRICANTS |
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| Wei Jianjun Xue Qunji. fRIBOCHEMICAL MECHANISM OF SILICON NITRIDE WITH WATER AND ETHANOL LUBRICANTS[J]. Journal of The Chinese Ceramic Society, 1993, 0(2) |
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| Authors: | Wei Jianjun Xue Qunji |
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| Abstract: | The friction and wear properties of silicon nitride (Si_3N_4) under dry sliding, water and ethanol lubricating conditions were investigated using a reciprocating pin-on-block tester. The tribochemical mechanism of Si_3N_4 with water and ethanol lubricants was studied by means of SEM, XRD, XPS. From the results, the decreasing order of the friction coefficients and the worn volume ot Si_3N_4 in various lubricating conditions are summarized as follows: dry sliding; water lubrication; ethanol lubrication. The proposed tribochemical mechanism of Si_3N_4 in water involves two aspects: Si_3N_4 reacts with water and forms crystal SiO_2; also Si_3N_4 reacts with oxygen dissolved in water, forming the amorphous Si-O compounds. The proposed tribochemical mechanism of Si_3N_4 in ethanol includes that Si_3N_4 reacts with ethanol and produces crystal SiO_2, which esterificates to form soluble silicon esters. |
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| Keywords: | silicon nitride water and ethanol tribological property tribochemical mechanism |
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