Effect of Ti Transition Layer Thickness on the Structure, Mechanical and Adhesion Properties of Ti-DLC Coatings on Aluminum Alloys.
Effect of Ti Transition Layer Thickness on the Structure, Mechanical and Adhesion Properties of Ti-DLC Coatings on Aluminum Alloys.
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Ti过渡层厚度对铝合金Ti-DLC涂层结构、力学和附着力的影响
DOI：
10.3390/ma11091742
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发表时间：
2018-09-16
期刊：
影响因子：
--
通讯作者：
Luo J
中科院分区：
文献类型：
--
作者：
Cao H;Qi F;Ouyang X;Zhao N;Zhou Y;Li B;Luo W;Liao B;Luo J
采用过滤阴极真空电弧（FCVA）技术，以乙炔为反应气体，在铝合金表面制备了Ti掺杂类金刚石（Ti-DLC）多层涂层。采用扫描电子显微镜（SEM）、拉曼光谱、X射线光电子能谱（XPS）、纳米压痕仪和划痕仪研究了不同Ti过渡层厚度对涂层结构、力学性能和附着力的影响。结果表明，Ti过渡层能改善涂层与基体的界面过渡，有利于获得良好的涂层结合力。Ti过渡层的厚度对涂层的组成和结构没有显著影响，但它影响了sp2-C键角和键长的畸变。纳米压痕和划痕试验结果表明，钛-类金刚石涂层的机械性能和附着力取决于钛过渡层的厚度。Ti过渡层有利于降低涂层的残余压应力。随着Ti过渡层厚度的增加，涂层的硬度值逐渐降低。然而，其弹性模量和附着力表现出一个初始的下降，然后增加波动。其中，Ti过渡层厚度为1.1 μm的Ti-DLC涂层具有较好的上级力学性能。
Multilayers of Ti doped diamond-like carbon (Ti-DLC) coatings were deposited on aluminum alloys by filtered cathodic vacuum arc (FCVA) technology using C2H2 as a reactive gas. The effect of different Ti transition layer thicknesses on the structure, mechanical and adhesion properties of the coatings, was investigated by scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), nanoindentation and a scratch tester. The results showed that the Ti transition layer could improve interfacial transition between the coating and the substrate, which was beneficial in obtaining excellent adhesion of the coatings. The Ti transition layer thickness had no significant influence on the composition and structure of the coatings, whereas it affected the distortion of the sp2-C bond angle and length. Nanoindentation and scratch test results indicated that the mechanical and adhesion properties of the Ti-DLC coatings depended on the Ti transition layer thickness. The Ti transition layer proved favorable in decreasing the residual compressive stress of the coating. As the Ti transition layer thickness increased, the hardness value of the coating gradually decreased. However, its elastic modulus and adhesion exhibited an initial decrease followed by an increasing fluctuation. Among them, the Ti-DLC coating with a Ti transition layer thickness of 1.1 μm exhibited superior mechanical properties.
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影响因子：
4.1
作者：
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