• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2014.11a
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• pp.298-298
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• 2014

표면 텍스처링 기술은 서로 접촉되는 표면 형태에 발생하는 마찰을 줄이는 기술이다. 이 기술은 자동차와 같은 기계장치에서 마찰을 줄여 보다 좋은 에너지 효율을 얻을 수 있어 효과가 기대되는 기술이다. 본 연구는 고체윤활제($CaF_2$ or $BaF_2$)와 alumina, zriconia를 이용하여 자기 윤활 세라믹 복합체를 만들고 그 위에 표면 텍스처링 후, 윤활 상태에서의 마찰특성을 알아보았다.

• Journal of the Korean Applied Science and Technology
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• v.34 no.2
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• pp.260-270
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• 2017

Zirconia has white color and physical, chemical stability, also using in high temperature materials and various industrial structural ceramics such as heat insulating materials and refractories due to their low thermal conductivity, excellent strength, toughness, and corrosion resistance. If hydrophobically modified zirconia is introduced into a hydrophobic acrylate coating solution, the hardness, chemical, electrical, and optical properties will be improved due to the better dispersibility of inorganic particle in organic coating media. Thus, we introduced $-CH_3$ group through silylation reaction using either trimethylchlorosilane(TMCS) or hexamethyldisilazane(HMDZ) on zirconia surface. The $Si-CH_3$ peaks derived from TMCS and HMDZ on hydrophobically modified zirconia surface was confirmed by FT-IR ATR spectroscopy, and introduction of silicon was confirmed by FE-SEM/EDS and ICP-AES. In addition, the sedimentation rate result in acrylate monomer of the modified zirconia showed the improved dispersibility. Comparison of the sizes of a pristine and the modified zirconia particles, which were clearly measured not by the normal microscope but by particle size analysis, provided a pulverizing was occurred by physical force during the silylation process. From the BET analysis data, the specific surface area of zirconia was approximately $18m^2/g$ and did not significantly change during modification process.