Abstract
Refractory heat-resistant ruthenium monoaluminide β-RuAl is a promising material for operation in high-velocity gas oxidizing flows at temperatures above work temperatures and melt temperatures of nickel superalloys and refractory nickel and titanium aluminides. The possibilities of preparing high-quality powder materials from RuAl for the manufacture of compact samples are considered. Compact materials with minimum porosity and practically equilibrium phase composition can be obtained under conditions of high-temperature reaction alloying during three-stage hot isostatic pressing with intermediate homogenizing annealing. Preliminary treatment of mixtures of Ru and Al powders in an attritor for 15 h reduces the exothermic effect of RuAl formation and lowers the temperature at which the contact interaction begins.
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