지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.1
- 수록면
- 1,023 - 1,027 (5page)
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초록· 키워드
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Recently, laser texturing has received lots of attention for improving the tribological performance of various surfaces, and this laser texturing of surfaces could be applied to improve the tribological performance of PVD coated surfaces. In this work two different patterns of laser surface texturing were performed on H13 substrate, and PVD AlCrSiN coatings with various N2 contents were made by unbalanced magnetron sputtering on the textured H13 specimens. The coating characteristics such as crystalline structure, surface morphology, hardness, and friction coefficient of the coatings as a function of the N2 partial pressure were investigated by X-ray diffraction (XRD), atomic force microscopy (AFM), microhardness tester, and wear test. Synthesis of the AlCrSiN thin films containing various N2 contents was successful using the unbalanced magnetron sputtering process. A dense and compact microstructure, as well as a very smooth surface,were observed from the synthesized thin films, which could be attributed to the addition of Si into the AlCrN films, producing an amorphous phase in the films. Also the hardness of the AlCrSiN films increased with increasing N2 partial pressures and the maximum hardness of approximately 33 GPa was measured from the AlCrSiN film synthesized with N2 partial pressures of 0.16 Pa. From the wear tests against an Al2O3 counterpart ball at room temperature without lubrication, the average friction coefficient of the non-textured AlCrSiN films of 0.42 was decreased to 0.38 and 0.36 for dimple-textured and honeycomb-textured AlCrSiN films, respectively. Laser surface texturing on the AlCrSiN films reduced the friction coefficients by approximately more than 15%, and further improvement on the tribological performance of the textured surfaces could be possible by optimizing the honeycomb-textured surfaces.
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