High Temperature Mechanical Properties of the Platinum Group Metals STRESS-RUPTURE STRENGTH AND CREEP BEHAVIOUR AT EXTREMELY HIGH TEMPERATURES

There is a constantly increasing need for metallic materials with melting points over 1700°C for use at very high temperatures. In contrast to the refractory metals: tantalum, niobium, tungsten, molybdenum and rhenium, which also have very high melting points, the metals of the platinum group, particularl-y platinum, rhodium and iridium, are characterised by outstanding chemical stability, oxidation resistance and resistance to many molten oxides. The p latinum group metals are therefore ideal materials for using at high temperatures while undergoing simultaneous chemical attack and mwhanical loading. However, for o ptimum effective employment of these metals, it is necessary to know their strength and deformation behaviour at extremely high temperatures. Data have therefore been collected from comparative investigations of platinum, platinum alloys, dispersion hardenedplatinum materials, rhodium and iridium. and the compilations are presented here.