Tribological properties of CrSiN-coated 301 stainless steel under wet and dry conditions
Tribological properties of CrSiN-coated 301 stainless steel under wet and dry conditions
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DOI：
10.1016/j.wear.2009.01.027
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发表时间：
2009-06
期刊：
影响因子：
5
通讯作者：
M. Azzi;M. Benkahoul;J. Szpunar;J. Klemberg-Sapieha;L. Martinu
中科院分区：
文献类型：
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作者：
M. Azzi;M. Benkahoul;J. Szpunar;J. Klemberg-Sapieha;L. Martinu
研究了CrSiN涂层在干湿条件下的摩擦学性能。采用双磁控溅射技术在301不锈钢衬底上沉积了厚度为2μm的CrSiN薄膜，在等离子体氮化表面顶部镀有厚度为500nm的铬界面层。采用扫描电镜（SEM）、能谱仪（EDS）和x射线衍射仪（xrd）对CrSiN薄膜的形貌和微观结构进行了表征。干、湿磨损试验使用线性往复球-平摩擦计进行。在湿态条件下，用1wt NaCl浸泡触点。%，并在开路电位（OCP）、阴极和阳极条件下进行滑动磨损试验。CrSiN薄膜在干燥条件下表现出优异的耐磨性：在1.6GPa赫兹应力下，经过1800次滑动磨损后，薄膜没有分层的趋势。然而，在潮湿条件下，薄膜的耐磨性很差，在较小的接触压力（1.2GPa）下，薄膜从衬底上脱落。结果表明，电极/电解质界面处的腐蚀反应是导致膜摩擦学性能下降的原因；在没有腐蚀反应的情况下（阴极极化下），CrSiN涂层可以更好地抵抗滑动磨损。
The tribological properties of CrSiN coatings were investigated under dry and wet conditions. CrSiN films (2μm thick) were deposited on 301 stainless steel substrates by dual magnetron sputtering, using a chromium interface layer (500nm thick) on the top of plasma nitrided surface. The morphology and microstructure of the CrSiN films were examined by SEM, EDS and X-ray diffractometry. Dry and wet wear tests were performed using a linear reciprocating ball-on-flat tribometer. In wet condition, the contact was immersed in NaCl 1wt.%, and the sliding wear tests were performed at open circuit potential (OCP), and under cathodic and anodic conditions. CrSiN films were found to exhibit excellent wear resistance under dry condition: the films had no tendency to delaminate after 1800 cycles of sliding wear under 1.6GPa Hertzian stress. However, under wet condition, the wear resistance was rather poor: the films detached from the substrate at smaller contact pressures (1.2GPa). It was demonstrated that the corrosion reactions at the electrode/electrolyte interface were the reason for the degradation of the tribological properties of these films; in the absence of corrosion reactions (under cathodic polarization), CrSiN coatings were found to resist much better sliding wear.