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采用磁控溅射法在316L不锈钢表面制备了具有不同调制结构的Ti/TiB_2多层膜,研究了调制结构对Ti/TiB_2多层膜在Hank’s模拟体液中与超高分子聚乙烯配副的摩擦学行为的影响。结果表明:多层膜的摩擦学行为与调制层数n间存在着一定的依赖关系。n=4的多层膜平均摩擦因数约为0.126,与316L不锈钢相比降低了34.3%;对磨副UHMWPE的磨损量明显降低,呈现出良好的减摩和耐磨效应。与316L不锈钢相比,多层膜在摩擦前后的自腐蚀电位提高,自腐蚀电流密度降低了2-3个数量级。n=4的多层膜开路电位为-0.237 V,也明显高于316L不锈钢。316L不锈钢磨损机理为磨粒磨损合并粘着磨损,多层膜的引入有效降低了316L不锈钢的磨粒磨损和粘着磨损程度。Ti/TiB_2多层膜在人工关节、人工椎间盘等医疗器械的表面改性有着广阔的应用前景。
Ti / TiB_2 multilayer films with different modulation structures were prepared by magnetron sputtering on the surface of 316L stainless steel. The effects of the modulation structure on the friction between Ti / TiB_2 multilayer films and UHMWPE in Hank’s simulated body fluid The impact of learning behavior. The results show that there is a certain relationship between the tribological behavior of multilayer films and the number of modulation layers. The average friction coefficient of multilayers with n = 4 is about 0.126, which is 34.3% lower than that of 316L stainless steel. The abrasion loss of UHMWPE on the grinding pair obviously decreases, showing a good anti-friction and wear-resistant effect. Compared with 316L stainless steel, the self-corrosion potential of multilayer films increases before and after rubbing, reducing the self-corrosion current density by 2-3 orders of magnitude. The open circuit potential of multilayer with n = 4 is -0.237 V, which is also significantly higher than that of 316L stainless steel. 316L stainless steel wear mechanism of abrasive wear combined with adhesive wear, the introduction of multi-layer film 316L stainless steel to reduce abrasive wear and adhesion wear degree. Ti / TiB_2 multilayers have broad application prospects in the surface modification of medical devices such as artificial joints and prosthetic disks.