Synthesis of Hf-modified aluminide coatings on Ni-base superalloys
Synthesis of Hf-modified aluminide coatings on Ni-base superalloys
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DOI：
10.1016/j.surfcoat.2011.08.031
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发表时间：
2011-12-15
影响因子：
5.4
通讯作者：
Sayre, Guy
中科院分区：
文献类型：
--
作者：
Wang, YongQing;Suneson, Marc;Sayre, Guy
通过向施加在飞行器涡轮机发动机部件上的铝化物涂层中少量添加反应性元素（RE）（例如铪（Hf）），可以显著改善保护性氧化皮对涂层的粘附性和涂层在高温下的抗氧化性。SIFCO成功开发了Hf改性铝化物涂层、镍基高温合金上的Hf-Pt改性铝化物涂层以及不同飞机涡轮机发动机部件上的Hf改性铝化物涂层的工业规模生产。利用扫描电子显微镜（SEM）、能谱仪（EDS）和辉光放电质谱仪（GDMS）对涂层的表面形貌和横截面微观结构进行了分析和比较。实验结果表明，Hf被成功地纳入和富Hf颗粒的沉淀观察到的涂层表面上，沿着晶界内的添加剂层，和添加剂层和互扩散层之间的界面。终于来了富铪颗粒以及铪的溶解度进行了讨论。(C)2011 Elsevier B. V.保留所有权利。
With small additions of Reactive Elements (RE), such as hafnium (Hf), to aluminide coatings applied on aircraft turbine engine components, the adherence of the protective oxide scale to the coatings and the oxidation resistance of the coatings at high temperatures can be significantly improved. At SIFCO, Hf-modified aluminide coatings, Hf-Pt-modified aluminide coatings on Ni-base superalloys and the industrial-scale production of Hf-modified aluminide coatings on different aircraft turbine engine components were successfully developed. Surface morphology and cross-section microstructure of the developed coatings were inspected and compared by using a Scanning Electron Microscope (SEM) equipped with energy dispersive spectroscopy (EDS), and Glow-Discharge Mass Spectrometry (GDMS). Experimental results showed that Hf was successfully incorporated and precipitated Hf-rich particles were observed on the coating surface, along grain boundaries within the additive layer, and at the interface between the additive layer and the interdiffusion layer. Finally. Hf-rich particles as well as Hf solubility are discussed. (C) 2011 Elsevier B.V. All rights reserved.