The Platinum Development Initiative: platinum-based alloys for high temperature and special applications: part IV
The Platinum Development Initiative: platinum-based alloys for high temperature and special applications: part IV
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DOI：
10.1595/147106710x492378
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发表时间：
2009
影响因子：
--
通讯作者：
J. H. Potgieter;N. Maledi;M. Sephton;L. Cornish
中科院分区：
文献类型：
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作者：
J. H. Potgieter;N. Maledi;M. Sephton;L. Cornish
根据铂开发倡议，正在开发用于高温和特殊用途的铂基合金，以实现良好的耐腐蚀和抗氧化性。本系列论文的第I-III部分涉及三元和四元Pt合金的开发（1-3）。在这篇最后的论文（第四部分）中，将硫酸钠盐处理的选定铂合金的腐蚀行为与涂层和未涂层CMSX-4®镍基高温合金（NBSA）的腐蚀行为进行了比较。扫描电子显微镜（SEM）的结果表明，保护氧化铝规模的不同integrities形成的Pt合金，而NBSA迅速失败，即使与额外的Pt-铝化物保护涂层。虽然铂合金上有凹坑，但它们很小，肉眼看不到。根据这些铂合金的热腐蚀性能，评估了它们在航空航天燃气涡轮机工业中的应用潜力。
Under the Platinum Development Initiative, platinum-based alloys were being developed for high-temperature and special applications for good corrosion and oxidation resistance. Parts I–III of the present series of papers dealt with the development of the ternary and quaternary Pt alloys (1–3). In this final paper (Part IV), the corrosion behaviour of selected Pt alloys treated with sodium sulfate salt was compared with that of coated and uncoated CMSX-4® nickel-based superalloy (NBSA). Scanning electron microscopy (SEM) results showed that protective alumina scales of different integrities formed on the Pt alloys, whereas the NBSAs failed rapidly even with an additional Pt-aluminide protective coating. Although there were pits on the Pt alloys, they were minor and not visible to the unaided eye. The potential for application of these Pt alloys in the aerospace gas turbine industry was assessed based on their hot corrosion performance.