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The influence of deposition process on structure of platinum-modifed aluminide coatings o Ni-base superalloy

机译：沉积工艺对铂改组铝涂层结构的影响O Ni基超合金

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The modern jet engines used in commercial and military aircrafts are characterized by operating temperature in turbine section above 1000°C. The Ni-base superalloy turbine blades and vanes working in high temperature in very aggressive environment require using of protective coatings. The aluminide coatings are widely used to protect this engine parts. The pack cementation, out of pack and chemical vapour deposition (CVD) technologies are usually used to produce this type of coating. The aluminide coatings can be modified by platinum or other elements. The Pt-modified aluminide coatings are characterized by better oxidation and corrosion resistance in comparison with conventional aluminide coatings and can be used as a bond coat for Thermal Barrier Coatings deposited by EB-PVD technology. In present study the influence of deposition technology and their's parameters on structure and chemical composition of Pt-aluminide coatings are presented. The base material for coatings was a Inconel 738 Ni-base superalloy. The first step of coatings production were Pt electroplating with different thickness of platinum layer. The second step of coating production was aluminising process. The aluminide coatings were produced by pack cementation and out of pack technologies. Additional the influence of heat treatment of base alloy with coatings was investigated. The structure of all deposited coatings was observed by scanning electron microscopy and the chemical and phase composition of coatings were investigated by EDS and XRD methods. The observed coatings were characterized by two types of structure: first based on NiAlPt phase obtained on thin Pt layer and the second with additional presence of PtAl_2 phase on the thick Pt layer.
机译：商业和军用飞机中使用的现代喷气发动机的特点是在1000°C以上的涡轮部分工作温度。在非常激进的环境中，在高温下工作的Ni基超合金涡轮叶片和叶片需要使用保护涂层。铝化涂层广泛用于保护该发动机部件。除了包装和化学气相沉积（CVD）技术通常用于生产这种类型的涂层。铝化涂层可以通过铂或其他元素改性。 PT改性的铝化铝化合物的特征在于与常规铝化涂层相比，通过更好的氧化和耐腐蚀性，并且可以用作EB-PVD技术沉积的热阻挡涂层的粘合涂层。目前研究了沉积技术及其参数对Pt-铝化涂层结构和化学成分的影响。涂层的基材是Inconel 738 Ni碱基超合金。涂层生产的第一步是具有不同厚度的铂层的PT电镀。涂层生产的第二步是铝化工程。铝化涂料通过包装胶粘和脱水技术。研究了基础合金与涂料的热处理的额外影响。通过扫描电子显微镜观察所有沉积涂层的结构，并通过EDS和XRD方法研究了涂料的化学和相组成。观察到的涂层的特征在于两种类型的结构：首先基于在薄Pt层上获得的NiAlpt阶段，第二种结构基于厚PT层上的Ptal_2相的另外存在。

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