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Platinum Group Metal Containing High Entropy Alloys for High Temperature Applications

用于高温应用的含铂族金属高熵合金

基本信息

批准号：
1915311
负责人：
金额：
--
依托单位：
University of Sheffield
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1915311
关键词：
Platinum Group Metal Containing Entropy

项目摘要

Metals such as platinum, palladium, iridium, osmium, rhodium and ruthenium (collectively known as the platinum group metals, or PGMs) have a number of unusual and attractive properties, including resistance to chemical attack and high temperature environments. They are however also relatively scarce and high cost (platinum is actually among the least expensive of these elements). Johnson Matthey supplies specialised PGM alloys to the automotive and aerospace sectors for ignition, forming key parts of common components such as spark plugs, as well as in more advanced applications. The alloys work extremely well for this purpose; however, customers are continually seeking more cost effective solutions.We will look at the physical metallurgy of PGMs and use this understanding to develop alternative alloys with equivalent or better performance, but lower PGM content. To achieve this the work will focus on a novel alloying strategy of multi principal component alloys (also called High Entropy Alloys), which are known to show unexpected behaviours in other systems. Such alloys have yet to be explored in the PGMs, although research on refractory alloys more generally indicates that complex systems may exhibit interesting properties. The project will involve work on both predictive methods and experimental validation.

铂、钯、铱、锇、铑和钌等金属（统称为铂族金属或铂族金属）具有许多不同寻常和吸引人的特性，包括耐化学侵蚀和耐高温环境。然而，它们也是相对稀缺和昂贵的（铂实际上是这些元素中最便宜的）。庄信万丰为汽车和航空航天领域提供专业的PGM合金，用于点火，形成常见部件（如火花塞）的关键部件，以及更先进的应用。合金在这方面工作得非常好；然而，客户不断寻求更具成本效益的解决方案。我们将着眼于PGM的物理冶金，并利用这种理解来开发具有同等或更好性能，但PGM含量较低的替代合金。为了实现这一目标，工作将集中在多主成分合金（也称为高熵合金）的新型合金化策略上，这些合金已知在其他系统中表现出意想不到的行为。这种合金尚未在PGMs中进行探索，尽管对耐火合金的研究更普遍地表明，复杂的体系可能表现出有趣的性质。该项目将涉及预测方法和实验验证两方面的工作。