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DLC、TiN涂层对TC4钛合金抗砂尘冲蚀性能的影响
引用本文:曹鑫,何卫锋,何光宇,廖斌,张虹虹,李应红.DLC、TiN涂层对TC4钛合金抗砂尘冲蚀性能的影响[J].中国表面工程,2016,29(4):60-67.
作者姓名:曹鑫  何卫锋  何光宇  廖斌  张虹虹  李应红
作者单位:空军工程大学等离子体动力学重点实验室, 西安 710038,空军工程大学等离子体动力学重点实验室, 西安 710038,空军工程大学等离子体动力学重点实验室, 西安 710038,北京师范大学核科学与技术学院, 北京 100875,西安交通大学机械工程学院, 西安 710049,空军工程大学等离子体动力学重点实验室, 西安 710038
基金项目:国家重点基础研究发展规划(973计划)(2015CB057400);国家自然科学基金(51405506);陕西省科技统筹创新工程计划(2015KTCQ01-72);中国博士后科学基金(2013M532223)
摘    要:为提高TC4钛合金的抗砂尘冲蚀性能,采用金属蒸汽真空弧(MEVVA)离子源注入与磁过滤真空阴极弧(FCVA)沉积复合技术、磁控溅射技术在TC4钛合金表面制备DLC、TiN涂层。采用SEM、Raman、XRD、纳米压痕仪和划痕仪等方法对涂层的物相结构、硬度、弹性模量以及与基体的结合力进行表征。在冲蚀试验平台上考核试样在不同入射角度条件下的抗砂尘冲蚀性能。结果表明:DLC涂层表面结构致密,含有大量sp3键,硬度为62.1 GPa,弹性模量为391.64 GPa,结合力达80.4 N;TiN涂层表面存在许多熔滴颗粒及空穴,硬度为22.72 GPa,弹性模量为383.18 GPa,结合力达34.7 N。30°冲蚀条件下,涂层主要是通过提高基体表面硬度来抵抗砂尘粒子的微切削作用,从而提高TC4钛合金的抗砂尘冲蚀性能。90°冲蚀条件下,涂层通过延缓基体的塑性变形来实现TC4钛合金抗砂尘冲蚀性能的提高。

关 键 词:TC4钛合金  抗砂尘冲蚀  DLC涂层  TiN涂层  质量损失
收稿时间:4/7/2016 12:00:00 AM
修稿时间:2016/5/26 0:00:00

Effects of DLC and TiN Coatings on Sand Erosion Resistance of TC4 Titanium Alloy
CAO Xin,HE Wei-feng,HE Guang-yu,LIAO Bin,ZHANG Hong-hong and LI Ying-hong.Effects of DLC and TiN Coatings on Sand Erosion Resistance of TC4 Titanium Alloy[J].China Surface Engineering,2016,29(4):60-67.
Authors:CAO Xin  HE Wei-feng  HE Guang-yu  LIAO Bin  ZHANG Hong-hong and LI Ying-hong
Affiliation:Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi''an 710038,Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi''an 710038,Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi''an 710038,College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875,School of Mechanical Engineering, Xi''an Jiaotong University, Xi''an 710049 and Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi''an 710038
Abstract:DLC and TiN coating were prepared on the substrate of TC4 titanium alloy respectively by combining metal vapor vacuum arc (MEVVA) technology and filtered cathodic vacuum arc (FCVA) deposition method and megnetron sputtering method to improve the erosion resistance of TC4 titanium alloy. SEM, Raman, XRD, nano indentation and scratch tester were used to analyze the phase structure, hardness, elastic modulus and bonding strength of DLC and TiN coating. The performance of erosion resistance of different samples were evaluated on the erosion test platform under different erosion degrees. The results show that the DLC coating has compact surface structure with plenty of sp3 bond. The hardness, elastic modulus and adhesion force of DLC coating are 62.1 GPa, 391.64 GPa and 80.4 N, respectively. The TiN coating, however, has large number of has droplet particles and holes on its surface. The hardness, elastic modulus and adhesion force of TiN coating are 22.72 GPa, 383.18 GPa and 34.7 N, respectively. At the erosion angle of 30°, coating mainly depends on improving the surface hardness to resist the micro-cutting action of particles, which thereby can improve the TC4 titanium alloy''s performance of sand erosion resistance. At the erosion angle of 90°, the delay of the substrate''s plastic deformation lead to the improvement sand erosion resistance of TC4 titanium alloy.
Keywords:TC4 titanium alloy  sand erosion resistance  DLC coating  TiN coating  mass loss
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