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采用电子束物理气相沉积(EB-PVD)技术在TiAl基体上制备NiAlHf涂层,结合氧化增重曲线的测试结果,研究了NiAlHf涂层对基体在900,950和1000℃空气中氧化行为的影响.采用X-射线衍射(XRD)研究表面的物相结构,XRD结果表明,沉积后表面形成β-NiAl相,说明Hf固溶于其中.结果表明,在950 ℃氧化后涂层表面形成致密的氧化铝保护膜.扫描电子显微镜(SEM)和能谱(EDS)被用来测试其表面的形貌和元素分布.结果表明,在氧化过程中,基体和涂层之间的元素发生互扩散.随着氧化时间的增加,涂层厚度减小,扩散区发生显著变化.采用显微硬度表征涂层的韧性,涂层的显微硬度(HV)为7050MPa左右.NiAlHf涂层能提高基体高温抗氧化性能.

参考文献

[1] Jung HG.;Jung DJ.;Kim KY. .Effect of Cr addition on the properties of aluminide coating layers formed on TiAl alloys[J].Surface & Coatings Technology,2002(1):75-81.
[2] Sarkar, S;Datta, S;Das, S;Basu, D .Oxidation protection of gamma-titanium aluminide using glass-ceramic coatings[J].Surface & Coatings Technology,2009(13):1797-1805.
[3] Gao, J.;He, Y.;Gao, W. .Oxidation behavior of γ-TiAl based alloy with Al_2O_3-Y_2O_3 composite coatings prepared by electrophoretic deposition[J].Surface & Coatings Technology,2011(19):4453-4458.
[4] Rabiei A.;Evans A.G. .FAILURE MECHANISMS ASSOCIATED WITH THE THERMALLY GROWN OXIDE IN PLASMA-SPRAYED THERMAL BARRIER COATINGS[J].Acta materialia,2000(15):3963-3976.
[5] WU Xiang-qing,XIE Fa-qin,HU Zong-chun,WANG Li.Effects of additives on corrosion and wear resistance of micro-arc oxidation coatings on TiAl alloy[J].中国有色金属学报(英文版),2010(06):1032-1036.
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