| 摘要: |
| 复合陶瓷涂层具有良好的抗腐蚀和耐磨性能,因其性能优异、成本较低而在汽车、轮船、电子、建筑等方面得到广泛应用。 为得到具有良好减摩耐磨性能的陶瓷涂层,试验采用钛酸四丁脂和硅烷偶联剂(KH560)制备 Ti-Si 有机膜先驱体,以激光为热源,采用先驱体转换法(PDC 法)制备了复合陶瓷涂层。 研究发现,陶瓷涂层中有机官能团随着激光功率增大不断减少,200 W 与 400 W 激光条件下制备的 Ti-Si 陶瓷涂层化学键类型主要为 Si-O-Si、Ti-O、Si-C 等,先驱体无机化程度显著提高,而在 600 W 和 800 W 激光条件下制备的陶瓷涂层无机化程度更高,无机化程度较低时涂层摩擦因数较小,无机化程度较高时涂层耐磨性较好。 试验表明,按 KH560 和钛酸四丁酯质量比为 1 ∶1. 8,固化温度 80 ℃固化时间 30 min,采用氩气作为保护气体,激光功率为 600 W,激光波长为 980 nm,扫描速率为 14 mm/ s,搭接率为 3%,“1”字形连续激光扫描一次,所制备的陶瓷涂层耐磨性较好,3 N 压力时其磨损主要为磨粒磨损,相对于 45 钢基体减摩 80%以上。 |
| 关键词: 激光裂解 Ti-Si 陶瓷涂层 微区分析 耐磨性 |
| DOI：10.11933/j.issn.1007-9289.20190308005 |
| 分类号:TG174 |
| 文章编号:1007-9289(2020)05-0083-07 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51805541, 51575526) |
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| Microstructure and Wear Resistance of Ceramic Coatings Prepared by Laser Pyrolysis of Ti-Si Organic Films |
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Wang Sijie1, Liu Zhaowei2, Wang Xiao3
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1.National Engineering Research Center for Mechanical Product Remanufacturing, Army Academy of Armored Forces, Beijing 100072 , China;2.Armored Investigation of Combat Support, Army Academy of Armored Forces Bengbu Campus, Bengbu 233000 , China;3.Department of Weapons and Control, Army Academy of Armored Forces, Beijing 100072 , China
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| Abstract: |
| Composite Ceramic Coatings have good corrosion resistance and wear-resistance property. They are widely used in automobiles, ships, electronics, and buildings because of their excellent performance and low costs. In order to obtain ceramic coatings with good wear-resistance property, the experiment used tetrabutyl titanate and silane coupling agent(KH60) to make Ti-Si organic film precursor, used laser as the heat source and created composite ceramic coating with the use of precursor con- version method (PDC method). The study shows that the organic functional groups of ceramic coatings decrease with the in- crease in laser power. Under the conditions of 200 W and 400 W lasers, the types of Ti-Si ceramic coating chemical bond are mainly Si-O-Si, Ti-O, and Si-C and the inorganic degree of the precursors is increased significantly. Furthermore, under the conditions of 600 W and 800 W lasers, the ceramic coatings are higher in their inorganic degree. The friction coefficient of the coatings is smaller when the inorganic degree is lower, and the abrasive wear resistance of coatings increases when the inorganic degree is higher. The experiment shows that if the mass ratio between KH560 and tetrabutyl titanate is 1 ∶1. 8, the curing temper- ature 80 degrees, the curing time 30 minutes, argon the protective gas, the laser power 600 W, the laser wavelength 980 nm, the scan rate 14 mm/ s, the lapping rate three percent, and the continuous laser of the figure“1” method scans it, the wear-re-sistance property of ceramic coatings will become better, and under the pressure of 3N, its wear is mainly abrasive wear. Com-pared with the 45 steel, the friction achieved a relative decrease of 80%. |
| Key words: laser pyrolysis Ti-Si ceramic coating microanalysis wear-resistance |
