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Platinum Metals Rev., 1993, 37, (2), 75

Aluminium-Ruthenium High-Temperature Alloys

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In a continuing search for materials that combine strength, toughness and oxidation resistance at high temperatures, a variety of inter-metallic compounds have been considered. A simple screening test identified aluminium-ruthenium, iridium-niobium, ruthenium-scandium and ruthenium-tantalum as worthy of investigation and some of the properties of these tough binary alloys were presented here in July 1992.

A further communication on the properties of aluminium-ruthenium alloys has now been published (R. L. Fleischer and D. W. McKee, “Mechanical and Oxidation Properties of AlRu-Based High-Temperature Alloys”, Metall. Trans. A, 1993, 24, (3), 759–763).

The authors confirm the interesting properties of Al47Ru53 and Al48Ru51, which combine low oxidation rates at 1100°C with good mechanical properties at room temperature. Al43Ru52Sc5 has good high-temperature mechanical properties, and at 1350°C the oxidation rate is only marginally unacceptable, indicating that the alloy may be useful at lower temperatures.

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