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氮化硅(Si_3N_4)薄膜具有化学稳定性高、电阻率高、绝缘性好、光学性能良好(其折射率在2.0左右)等特性。同时氮化硅膜是一种很好的耐磨材料,其铅笔硬度理论上可以达到9H以上,通过在其它的镀膜产品上加镀一层氮化硅膜,可有效改善原有镀膜产品的耐磨性,避免膜层出现膜面划伤而造成的外观不良。本文主要研究采用中频磁控反应溅射制备氮化硅薄膜,氮化硅薄膜的耐磨性能取决于镀膜过程中的各种工艺参数,包括:N_2/Ar比、沉积温度、溅射功率、膜层厚度2等。通过对不同工艺条件下镀制的氮化硅薄膜的耐磨性及膜层结构进行对比,筛选出具有优良耐磨性能的氮化硅薄膜的工艺参数。 相似文献
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采用两种化学着色工艺,分别在黄铜表面得到了青绿色膜层和黑色膜层。采用电化学测试、点滴试验、耐磨性测试和扫描电镜对着色黄铜的耐蚀性、耐磨性和表面形貌进行了检测。黄铜表面着青绿色的最佳工艺条件为:硫代硫酸钠120g/L,硫酸镍40g/L,氯化铵60g/L,温度25℃,时间7min。黄铜表面着黑色的最佳工艺条件为:过硫酸钾12g/L,氢氧化钾50g/L,温度55℃,时间9min。黄铜着青绿色后,膜层暗淡,均匀性和耐磨性较差;而黄铜着黑色后,膜层致密,色泽光亮,并且其耐蚀性和耐磨性均比着青绿色膜层的强。黄铜着黑色工艺能同时起到装饰、防腐、耐磨的作用,具有较强的实用价值。 相似文献
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对比分析了脉冲阳极氧化和直流阳极氧化工艺对TC4钛合金表面形貌、拉伸性能、疲劳强度和耐磨性的影响。结果表明,脉冲阳极氧化和直流阳极氧化膜的粗糙度相较于TC4钛合金更大,而表面硬度从高至低为:脉冲阳极氧化膜>TC4钛合金>直流阳极氧化膜。虽然阳极氧化后试样的力学性能都相较于处理前有不同程度的减小,但是耐磨性有较大的提升。脉冲阳极氧化试样的疲劳强度接近TC4钛合金基材,且明显高于同样膜厚的直流阳极氧化试样,它的强度、断后伸长率和耐磨性也更优。 相似文献
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The tribological properties of poly(ether–ether–ketone) (PEEK)/aluminum nitride (AlN) composites reinforced with micro‐ and nano‐AlN particles were evaluated under dry sliding conditions. The wear resistance of pure PEEK is 10‐fold higher than mild steel. It was further improved by 2‐fold at 20 wt % micro‐AlN and by more than 4‐fold at 30 wt % nano‐AlN composite compared with pure PEEK. The improvement in wear resistance was attributed to a thin and coherent transfer film. However, it was deteriorated on further increasing micro‐AlN. The coefficient of friction of the composites was increased. Scanning electron microscopy and optical microscopy of worn surfaces and transfer films have been explained in detail. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 相似文献
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使用磁控溅射法在生物医用NiTi合金基体表面制备了Ti/TiN、Ti/DLC以及Ti/CNx梯度薄膜,利用扫描电镜研究了薄膜的截面形貌,并使用划痕仪及摩擦磨损仪研究比较了薄膜的力学性能。结果表明:薄膜均表面平整,与基底结合紧密。Ti/CNx薄膜与NiTi合金基底的结合力大于Ti/DLC薄膜,略低于Ti/TiN薄膜。3种梯度薄膜均能有效改善NiTi合金的耐磨损性能,其中,Ti/CNx薄膜拥有最低的摩擦系数和最完整的磨损表面,耐磨性最好。 相似文献
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Yuko Hibi Yuji Enomoto Harumichi Sato Shinya Sasaki 《Journal of the American Ceramic Society》2002,85(9):2373-2375
Titanium–silicon–nitrogen (Ti-Si-N) composites were produced from a mixture of Si3 N4 , titanium nitride (TiN), and titanium by spark plasma sintering to develop wear-resistant materials with good environmental and biological compatibilities in water and sea water. The Ti-Si-N composite consisted of Si3 N4 , TiN, and titanium metal-rich particles coated with TiSi x . Results of sliding tests in water and in artificial sea water showed that the wear resistance of the Ti-Si-N composite was much better than that of the titanium metal. 相似文献
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以TiCl4和NH3为原料,用常压化学气相沉积法在玻璃基板表面沉积得到了TiN薄膜.采用X射线衍射、场发射扫描电子显微镜、电阻仪、紫外-可见光谱仪等研究了喷涂距离(输入TiCl4管道末端到基板之间的距离)对沉积的TiN薄膜的结晶性能和表面形貌,以及薄膜的电学性能和光学性能的影响.结果表明:当喷涂距离为5cm和10cm时,玻璃基板表面形成电阻较高、反射率较低的较疏松薄膜.当喷涂距离增加到13cm和15cm时,可以得到结晶良好、低电阻、高反射、致密的TiN薄膜.当喷涂距离进一步增加到20cm以上,得到的薄膜的电阻率随之升高而反射率下降.对喷涂距离对薄膜性能的影响机理进行了分析,认为喷涂距离的变化会影响扩散到达并吸附在基板表面的反应物分子数量比例,进而影响沉积薄膜的性能. 相似文献
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《Ceramics International》2022,48(15):21305-21316
Sintered carbides are promising materials for surfaces that are exposed to extreme wear. Owing to their high service load, ceramic-based thin films are coated on carbides using different techniques. In this study, non-toxic and cobalt-free powder metallurgy-sintered carbide samples were coated with TiN, TiAlN, CrAlN, and TiSiN ceramic-based thin film coatings by cathodic arc physical vapor deposition. The microstructure (phase formation, coating thickness, surface roughness, and topography), mechanical properties (hardness, modulus of elasticity, and plasticity indices), and tribological properties (nanoscratch and wear behavior) of the thin film coatings were investigated. No cracks or defects were detected in these layers. The ceramic-based ternary nitride thin film coatings exhibited better mechanical performance than the TiN coating. The TiN thin film coating had the highest average surface roughness, which deteriorated its tribological performance. The ternary nitride thin film coatings exhibited high toughness, while the TiN thin film coating exhibited brittle behavior under applied loads when subjected to nanoscratch tests. The wear resistance of the ternary nitride coatings increased by nearly 9–17 times as compared to that of the TiN coating and substrate. Among all the samples investigated, the substrate showed the highest coefficient of friction (COF), while the TiSiN coating exhibited the lowest COF. The TiSiN thin film coating showed improved mechanical and tribological properties as compared to other binary and ternary nitride thin film coatings. 相似文献
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电流密度对Ti 6Al 4V微弧氧化膜形貌和性能的影响 总被引:1,自引:0,他引:1
采用NaAlO2-Na3PO4-NaF溶液体系,研究了电流密度对Ti 6Al 4V合金微弧氧化膜厚度、生长速率、表面形貌、粗糙度、组成相以及氧化膜耐蚀性、耐磨性等影响.结果表明,(1)在试验的电流密度范围内,氧化膜的厚度随电流密度的增大呈线性增大,但氧化膜的粗糙度却几乎呈指数增大,表面质量变差;(2)在质量分数为3.5%的NaCl溶液中显示了比Ti 6Al 4V钛合金更好的耐蚀性;(3)在干摩擦条件下,氧化膜的摩擦系数高于基体的,氧化膜的磨损机制为脆性断裂. 相似文献