李玉琴,文建中,孙志平.TC4钛合金表面TiAlN/Ti涂层的抗冲蚀性能研究[J].表面技术,2021,50(7):276-282, 357.
LI Yu-qin,WEN Jian-zhong,SUN Zhi-ping.Study on Erosion Resistance of the TiAlN/Ti Coating for TC4 Titanium Alloy[J].Surface Technology,2021,50(7):276-282, 357 |
| TC4钛合金表面TiAlN/Ti涂层的抗冲蚀性能研究 |
| Study on Erosion Resistance of the TiAlN/Ti Coating for TC4 Titanium Alloy |
| 投稿时间：2021-01-19 修订日期：2021-03-24 |
| DOI：10.16490/j.cnki.issn.1001-3660.2021.07.029 |
| 中文关键词: 钛合金 TiAlN/Ti涂层 涂层结构 抗冲蚀性能 |
| 英文关键词:titanium alloy TiAlN/Ti coatings coating structure erosion resistance |
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| 中文摘要: |
| 目的 通过明晰TC4钛合金表面不同结构的TiAlN/Ti涂层的冲蚀机制，为提高TC4钛合金的抗冲蚀性能、制备具有良好冲蚀性能的涂层奠定基础。方法 采用磁过滤真空阴极弧(FCVA)与金属蒸汽真空弧(MEVVA)技术，按照一定方式在TC4钛合金表面制备相同厚度不同层数的TiAlN/Ti涂层，采用扫描电镜(SEM)、光学显微镜、纳米压痕仪，对TiAlN/Ti涂层的微观结构和力学性能进行表征和分析。采用冲蚀试验平台，通过参数的调整来模拟沙尘环境，开展TC4钛合金和TiAlN/Ti涂层的冲蚀试验，计算获得冲蚀率。采用Proto-LXRD应力仪测试分析冲蚀前后TiAlN/Ti涂层的残余应力，利用SEM对涂层的冲蚀形貌进行表征和分析，并探讨涂层冲蚀损伤机理。结果 相比于TC4基体试样，层数为4、8、12层的TiAlN/Ti涂层试件冲蚀后的质量损失分别降低了86.9%、91.3%和94.0%，残余压应力分别增加了34、135、203 MPa。对比冲蚀区表面形貌，当涂层的层数为4层时，冲蚀区涂层脱落明显;当涂层层数为8层时，冲蚀区涂层局部有脱落;当涂层层数为12层时，冲蚀区涂层脱落不明显，对基体的防护较好。结论 MEVVA离子源注入技术显著提高了涂层的致密度和涂层与基体间的结合力。TiAlN/Ti涂层能显著改善试样的表面性能。相同涂层厚度下TiAlN/Ti涂层的层数越多，H3/E2值越大，抗冲蚀性能越优异。 |
| 英文摘要: |
| To clarify the erosion mechanism of multilayer TiAlN/Ti coatings on TC4 substrate, the paper provides a basis to improve the erosion resistance of TC4 alloy and prepare the coatings with excellent erosion resistance. TiAlN/Ti coatings with the same thickness and different layers are prepared on the surface of TC4 titanium alloy by magnetic filtration vacuum cathode arc (FCVA) and metal steam vacuum arc (MEVVA). The microstructure and mechanical property of TiAlN/Ti coating are characterized and analyzed by SEM, optical microscope and nano-indentation instrument. The erosion tests of TC4 titanium alloy and TiAlN/Ti coatings are carried out on the erosion test platform through the adjustment of parameters to simulate the dust environment. The erosion rate is calculated. The residual stress are characterized by proto-LXRD, the reosion morphology is analyzed by SEM, and the erosion mechanism is investigated. The test results show that the mass loss of TiAlN/Ti coatings with 4, 8 and 12 layers decreased by 86.9%, 91.3% and 94.0% respectively and the residual stress increases by 34 MPa, 135 MPa and 203 MPa. Concerning about the surface morphology of the erosion area, the erosion area of 4 layers coating is obviously exfoliated, the erosion area of 8 layers coating is partially exfoliated, and the erosion area of 12 layers coating is slightly exfoliated, which provides excellent protection for the substrate against erosion. MEVVA can significantly improve the adhesion between the coating and the matrix, and TiAlN/Ti coating could significantly improve the surface properties of the substrate. The more TiAlN/Ti layer number, the larger H3/E2 value, the better erosion resistance could be achieved. |
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