Synthesis of advanced aluminide intermetallic coatings by low-energy Al-ion radiation.
Synthesis of advanced aluminide intermetallic coatings by low-energy Al-ion radiation.
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低能铝离子辐射合成先进铝化物金属间化合物涂层
DOI：
10.1038/srep26535
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发表时间：
2016-05-19
影响因子：
4.6
通讯作者：
Wang F
中科院分区：
文献类型：
--
作者：
Shen M;Gu Y;Zhao P;Zhu S;Wang F
在高温下工作的金属（例如燃气轮机中的超级合金）依赖于热生长氧化物（TGO，通常是氧化铝）来抵抗腐蚀。镍基铝化物（NiAl）作为一种性能优良的上级氧化铝TGO形成剂，在航空发动机涡轮机的涡轮机叶片防护涂层中起着重要作用。降低TGO增长率对于提供可持续保护至关重要，特别是在热障涂层（TBC）中。然而，目前只能通过在传统的基于扩散或沉积的涂层合成期间将第三元素（Pt或反应性元素）添加到NiAl中的策略来实现。在这里，我们提出了一个高度灵活的铝离子辐射为基础的合成先进的NiAl涂层，实现低TGO生长速率，而不依赖于第三元素的添加。我们的研究结果扩展了降低TGO生长速率的策略，并展示了离子辐射在推进材料合成中的潜力。
Metals that work at high temperatures (for instance, superalloys in gas-turbines) depend on thermally grown oxide (TGO, commonly alumina) to withstand corrosion attack. Nickel Aluminide (NiAl) as one superior alumina TGO former plays an important role in protective coatings for turbine blades in gas-turbine engines used for aircraft propulsion and power generation. Lowering TGO growth rate is essentially favored for offering sustainable protection, especially in thermal barrier coatings (TBC). However, it can only be achieved currently by a strategy of adding the third element (Pt or reactive elements) into NiAl during traditional diffusion- or deposition-based synthesis of the coating. Here we present a highly flexible Al-ion radiation-based synthesis of advanced NiAl coatings, achieving low TGO growth rate without relying on the third element addition. Our results expand the strategy for lowering TGO growth rate and demonstrate potentials for ion radiation in advancing materials synthesis.