Platinum Group Metal Containing High Entropy Alloys for High Temperature Applications

铂族金属，如铂族金属，或称铂族金属，或称铂族金属，包括耐化学腐蚀和耐高温环境，具有许多特殊和吸引人的性能。然而，它们也相对稀缺且成本较高(铂金实际上是这些元素中最便宜的)。强生Matthee为汽车和航空航天行业提供专业的PGM合金点火，形成火花塞等常见部件的关键部件，以及更高级的应用。对于这一目的，合金工作得非常好；然而，客户不断寻求更具成本效益的解决方案。我们将研究PGMS的物理冶金学，并利用这一认识开发具有同等或更好性能、但PGM含量较低的替代合金。为了实现这一点，工作将集中在多主成分合金(也称为高熵合金)的一种新的合金化策略上，这种合金在其他系统中表现出意想不到的行为。尽管对耐火合金的研究更普遍地表明，复杂的体系可能会显示出有趣的性质，但这种合金还有待于在PGMS中进行探索。该项目将涉及预测方法和实验验证两方面的工作。

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.