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为了改善人工关节的生物摩擦学性能,采用磁过滤直流阴极真空弧源沉积技术在Co-Cr-Mo合金基体表面制备了多层C/C膜。采用拉曼光谱对薄膜的结构进行了表征;利用原子力显微镜观察了多层C/C膜的表面形貌;采用CSEM纳米硬度计测试了多层膜的纳米硬度;在销盘式摩擦磨损试验机上考察了多层膜的生物摩擦学性能。结果表明:多层C/C膜为典型的类金刚石结构,其表面光滑致密,硬度高达52 GPa,它与SiC球在磷酸盐缓冲溶液中的稳定摩擦系数仅为0.012,明显提高了人工关节用材料钴合金的生物摩擦学性能。 相似文献
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透明塑料用耐磨薄膜材料的研究进展 总被引:3,自引:0,他引:3
透明又耐磨的薄膜涂层是改善透明塑料表面抗划伤性耐磨性有效方法。本文综述了透明耐磨薄膜的种类和制备方法,从成膜材料、溶剂、增强材料、固化及测试方法总结了有机-无机杂化材料用作耐磨薄膜涂层的研究进展。 相似文献
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用木材制备生物结构陶瓷 总被引:14,自引:7,他引:7
木材经千百万年自然界的演化,形成了独特的生物学结构,多层次、纤维状胞管结构和各向异性是其主要特点。木材这种高气孔率材料有良好的刚性、强度和韧性,与其结构是密切相关的。以木材为模板,通过有机-无机转化,获得具有生物结构的陶瓷材料,为材料的结构设计提供了新思路。通过木材的陶瓷化可以制备出炭素材料、碳化物陶瓷、氧化物陶瓷、无机/有机复合材料和薄膜等。木材是可再生性资源,这种技术对结构的可调控性很好,材料性能独特,发展前景广阔。评述了该领域近年来的研究进展。 相似文献
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美国Sermatech国际公司报道,Sermc Tel系无机涂层覆盖于金属表面可制造出陶瓷/金属复合薄膜,该薄膜具有优异的防腐蚀、侵蚀、热剥落和磨损性能。对铁金属来说,SermcTel涂层含有铝成分可提供牺牲保护,涂层受到腐蚀、浸蚀,而衬底材料可保持原封不动,从而延长设备寿命。 相似文献
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高温氧化对钛合金微弧氧化陶瓷膜组成与结构的影响 总被引:1,自引:0,他引:1
针对钛合金不耐高温氧化的问题,在铝酸钠电解液体系中,利用双相脉冲直流微弧氧化技术,在TC4钛合金表面原位生长以Al2TiO5为主晶相的复合氧化物陶瓷膜,研究了1000℃高温氧化对陶瓷膜试样的相组成、结构的影响及膜层增重特点.研究表明,陶瓷膜层试样的高温氧化过程包括Al2TiO5分解、基体氧化和膜层表面形貌变化3个方面.高温氧化后,膜层的主晶相由Al2TiO5变为α-Al2O3和金红石型TiO2,同时,膜层的表面形貌发生显著的变化;由于膜层和基体的热膨胀系数不同和基体钛的氧化,使得高温氧化后膜层在冷却过程中表面出现裂纹和脱壳.陶瓷膜层极大地减少了TC4钛合金在1000℃高温氧化时的增重,因此,陶瓷膜层可用于TC4钛合金的恒温氧化防护. 相似文献
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Minh-Quy LE Seock-Sam KIM 《材料科学技术学报》2006,22(4):500-510
Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. Various combinations of indenter radius-coating thickness ratios and interlayer thickness-coating thickness ratios were used in the modeling. The effects of the interlayer, the coating and the substrate on the indentation behavior, such as the radial stress distribution along the coating surface as well as the coating interface, and the plastic deformation zone evolution in the substrate were investigated in connection with the above mentioned ratios. The coating cracking dominant modes were also discussed within the context of the peak tensile stresses on the coating surface and on the coating interface. 相似文献
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Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. Various combinations of indenter radius-coating thickness ratios and interlayer thickness-coating thickness ratios were used in the modeling. The effects of the interlayer, the coating and the substrate on the indentation behavior, such as the radial stress distribution along the coating surface as well as the coating interface, and the plastic deformation zone evolution in the substrate were investigated in connection with the above mentioned ratios. The coating cracking dominant modes were also discussed within the context of the peak tensile stresses on the coating surface and on the coating interface. 相似文献
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Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis(FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. The fracture mechanics of the ceramic coatings mechanisms due to occurrence of surface ring cracks extending traverse the coating thickness under spherical indentation are investigated within the framework of linear fracture mechanics. The J-integral associated to such cracks was computed. The evolution of J-integral vs the crack length and the indentation depth was studied. The effects of the interlayer, the coating and the substrate on the J-integral evolution were discussed. The results show that a suitable metallic interlayer can improve the fracture resistance of the coating systems under the same indentation conditions through reducing the J-integral. 相似文献
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Minh-Quy LE Seock-Sam KIM 《材料科学技术学报》2006,22(5):594-598
Spherical indentation of ceramic coatings with metallic interlayer was performed by means of axisymmetric finite element analysis (FEA). Two typical ceramic coatings with relatively high and low elastic modulus deposited on aluminum alloy and carbon steel were considered. The fracture mechanics of the ceramic coatings mechanisms due to occurrence of surface ring cracks extending traverse the coating thickness under spherical indentation are investigated within the framework of linear fracture mechanics. The J-integral associated to such cracks was computed. The evolution of J-integral vs the crack length and the indentation depth was studied. The effects of the interlayer, the coating and the substrate on the J-integral evolution were discussed. The results show that a suitable metallic interlayer can improve the fracture resistance of the coating systems under the same indentation conditions through reducing the J-integral. 相似文献
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激光裂解聚合物先驱体在金属表面制备性能优异的陶瓷涂层,解决了金属本身存在的耐磨防腐蚀性能不足的问题,已成为一种行之有效的方法。采用激光裂解含二茂铁的聚硅氧烷制备了SiOC(Fe)陶瓷涂层,采用电子显微镜(SEM)、X射线衍射仪(XRD)和X射线光电子能谱(XPS),分析了激光裂解含二茂铁的聚硅氧烷生成物的组成与结构,并初步研究了其裂解机理。结果表明:在激光作用下,含二茂铁的聚硅氧烷在激光裂解过程中会发生非平衡态的自由基化学反应,生成的陶瓷涂层主要由晶态的SiC、Fe_3C,非晶态的SiO_2、Fe_2O_3、Fe_3O_4以及C单质、C_6H_(18)OSi_2等物质组成,由二茂铁激光裂解生成的Fe_2O_3、Fe_3O_4、Fe_3C相对制备的陶瓷涂层孔隙具有填补作用。二茂铁质量分数越大,陶瓷涂层表面越平整致密,孔隙越少。 相似文献
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喷溅和粘枪是炼钢过程中的常见现象,在攀钢炼钢厂的半钢冶炼过程中表现尤为突出。利用热喷涂技术,研究了氧枪枪身表面上喷涂高温防粘梯度陶瓷涂层的组织,性能及结果,并探讨了涂层的梯度匹配及防粘机理。 相似文献
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金属表面Sol-gel法制备耐腐蚀陶瓷涂层的研究进展 总被引:1,自引:0,他引:1
综述了溶胶-凝胶涂层的成膜原理,制备工艺,比较了溶胶-凝胶法与其它金属陶瓷涂层的制备工艺,讨论了溶胶-凝胶涂层对金属耐磨腐蚀性能,耐磨性能的改进及在腐蚀防护领域中的应用,还对溶胶-凝胶涂层技术的发展的提出了看法。 相似文献