TC4合金表面微弧氧化制备抗高温氧化涂层
发布时间：2019-05-24 04:59
【摘要】：目的寻求最佳的微弧氧化工艺参数,提高钛合金的高温抗氧化性能。方法进行3因素3水平正交试验(3因素包括电压、氧化反应时间和电解液浓度),通过XRD和SEM表征微弧氧化涂层的物相和显微结构,采用650℃×100 h循环氧化试验评价涂层的抗高温氧化性能,最终利用极差分析法分析各因素对涂层试样氧化增重的影响主次,并得到最优参数组合。利用回归分析建立氧化增重与试验各参数之间的数学模型,并分析模型的显著性。结果不同工艺参数下制得的微弧氧化涂层表面形貌特征不同,涂层物相以金红石相和锐钛矿相二氧化钛为主。3个因素对涂层抗高温氧化性的影响由大到小依次为:电压时间电解液浓度。建立的氧化增重W与各参数(电压V、反应时间t、电解液浓度E)间的二次函数方程模型为:W=0.008 39(V-396.6)+0.1698t-64.5E-0.000 108(V-396.6)2-0.0044t2+700E2+0.0017。结论最佳参数组合为:电压480 V,时间25 min,电解液浓度0.04 mol/L。通过回归分析得到的氧化增重与各参数间的数学模型显著。
[Abstract]:Objective to find the best micro-arc oxidation process parameters and improve the high temperature oxidation resistance of titanium alloy. Methods three factors and three levels orthogonal test (three factors including voltage, oxidation reaction time and electrolyte concentration) were carried out. The phase and microstructure of micro-arc oxidation coating were characterized by XRD and SEM. The oxidation resistance of the coating at 650 鈩，
本文编号：2484581
[Abstract]:Objective to find the best micro-arc oxidation process parameters and improve the high temperature oxidation resistance of titanium alloy. Methods three factors and three levels orthogonal test (three factors including voltage, oxidation reaction time and electrolyte concentration) were carried out. The phase and microstructure of micro-arc oxidation coating were characterized by XRD and SEM. The oxidation resistance of the coating at 650 鈩，
本文编号：2484581
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