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钛合金表面织构陶瓷固体润滑复合涂层的制备与摩擦学性能

时间:2019-01-19 20:48来源:毕业论文
对钛合金先进行激光表面织构化处理,然后进行等离子电解氧化,再沉积银和二硫化钼膜,测试钛合金表面的室温和高温摩擦学性能,利用多种分析测试手段,分析摩擦表面的成分和形

摘要钛合金的耐磨损性能差,这限制了其在摩擦相关领域的应用。在钛合金表面进行等离子电解氧化,形成高硬度的氧化物陶瓷涂层,改善其耐磨性。另外,采用等离子电解氧化技术和激光表面织构化技术对钛合金进行复合处理,可以在其表面形成多尺度微孔结构,可以提高表面润滑涂层的结合强度,增强钛合金表面对润滑剂的储存效果。本文通过对钛合金先进行激光表面织构化处理,然后进行等离子电解氧化,再沉积银和二硫化钼膜,测试钛合金表面的室温和高温摩擦学性能,利用多种分析测试手段,分析摩擦表面的成分和形貌,总结磨损机制。32978
结果表明,经等离子电解氧化和激光表面织构化处理复合处理的钛合金储存润滑剂银和二硫化钼的能力得到了大幅度提高。室温下,涂覆有二硫化钼的试样的摩擦系数在较长时间内保持在较低水平;高温下,二硫化钼被氧化,润滑效果降低,贵金属银则在对摩材料上形成了转移膜,使得摩擦系数由最初的较高逐渐的降低至较低水平,有效的保护了试样表面。
关键词  等离子电解氧化;激光表面织构化;镀银;二硫化钼;耐磨性
毕业论文设计说明书外文摘要
Title  Tribological properties of laser surface textured and plasma  
      electrolytic oxidation duplex-treated Ti6Al4V alloy deposited  
      with Ag/MoS2 film
Abstract
The wear resistance of titanium alloy is poor, which limits its application in friction related field. The oxide ceramic coating with high hardness was formed by plasma electrolytic oxidation process on the surface of titanium alloy , which improves its wear resistance. In addition, the combination of plasma electrolytic oxidation (PEO) technology and laser surface texturing (LST) technology could form multi-scale microporous structure on the titanium alloy surface, and can improve the bonding strength of surface lubricating coating and reinforce the lubricant storage of solid lubricants. Soft silver and MoS2 films were formed on LST/PEO duplex-treated surface as solid lubricants. The tribological properties of titanium alloy surface from room to high temperature were tested. The surface composition and morphology were analyzed by a variety of test means and the friction and wear mechanisms were summarized.

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 The results showed that the titanium alloy which treated by the plasma electrolytic oxidation and laser surface texture process is helpful for preserving   more silver and molybdenum disulfide lubricants. At room temperature, the friction coefficient of samples burnished with MoS2 films maintains at a relatively low level in a long time. At high temperature, MoS2 is oxidized and its lubricating effect is reduced. While the precious metals silver can form soft transfer film on the friction counterface material, which makes the friction coefficient maintain a lower level.
Keywords  Plasma electrolytic oxidation; Laser surface texturing;                   Silver; Molybdenum disulfide; Wear resistance
 目   次
1   绪论 1
1.1  引言 1
1.2  钛及钛合金   1
1.3  等离子电解氧化  2
1.4  激光表面织构化  3
1.5  润滑  4
2    实验部分 5
2.1  基体材料及预处理 5
2.2  激光表面织构化处理 5
2.3  钛合金表面涂层制备 5
2.5  MoS2的涂抹 6
2.6  摩擦磨损实验 6
3    结果分析 8
  3.1  LST/PEO 8
  3.2  LST/PEO/MoS2 12
  3.3  LST/PEO/MoS2/Ag 17
结论  22
致谢  23 钛合金表面织构陶瓷固体润滑复合涂层的制备与摩擦学性能:http://www.lwfree.cn/cailiao/20190119/29796.html
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