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

There is a constantly increasing need for metallic materials with melling points over 1700(degree)C for use at very high temperatures. In contrast to the refractory metalas: tantalum, niobium, tungsten, molybdenum and rhenium, which also have very high melting points, the metals of the platinum group, particularly platinum, rhodium and iridium, are characterised by outstanding chemical stability. oxidalion resistance and resistance to many molten oxides. The platinum group metals are therefore ideal materials for using at high temperatures while undergoing simultaneous chemical attack and mechanical loading. However, for optimum 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 ptatinum, platinum alloys, dispersion hardened platinum materials, rhodium and iridium, and the compilations are presented here.