Lubrication of Si3N4 and Al2O3 in water with and without addition of silane coupling agents in the range of 0.05–0.10 mol/l |
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Authors: | Yuko Hibi Yuji Enomoto |
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Abstract: | To improve water lubrication of ceramics at a lower sliding velocity, the effect of the addition of silane coupling agents was investigated. Si3N4 and Al2O3 were slid against themselves in water with and without the addition of silane coupling agents in amounts ranging from 0.05 to 0.10 mol/l. Silane coupling agents containing one or more amino groups were effective in reducing the friction of Si3N4 and Al2O3 in water. Si3N4 also showed significant wear reduction but not Al2O3. However, the addition of a silane coupling agent containing an epoxy group increased both friction and wear of Si3N4. Improved lubricative characteristics of Si3N4 in water and in silane coupling agent solutions were obtained when Si3N4 contained smaller amounts of sintering additives. The adsorption behaviour of a silane coupling agent on ceramics was examined using both Fourier transform infrared spectroscopy and thin layer chromatography to clarify the interaction between the silane coupling agent and the ceramics. The role of polysiloxane film formation on ceramics is discussed to demonstrate the lubrication properties of ceramics. |
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Keywords: | Author Keywords: lubrication friction wear ceramics silicon nitride alumina water silane coupling agent |
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