IRIDIUM-BASE ALLOYS AND THEIR BEHAVIOR IN THE PRESENCE OF CARBON
AEROJET-GENERAL CORP SACRAMENTO CA MATERIALS RESEARCH LAB
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Experimental results pertaining to the melting temperatures of selected iridium-osmium-rhodium, iridium-osmium-platinum, and iridium-rhenium- rhodium alloys are described. The eutectic temperatures of these alloys with carbon were measured, and in addition, the compositions of the respective eutectics were determined by metallographic examination of chemically analyzed alloys. A brief theoretical analysis of the data was also performed with the specific objective of establishing numerical relations between the melting point depression and properties of the melt as well as the component metals. The thermal expansion characteristics of several of the iridium-base alloys were measured up to 1800 C by high temperature, X-ray diffraction as well as by dilatometric techniques.
- Properties of Metals and Alloys