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Ivan I. Fedorayev, Leonid I. Bakhratov, Natalia
E. Dmitrieva
Reduction
of the oxidized surface of cobalt-rhenium alloys with chromium from the gas
phase
Abstract
Abstract. The
development of new cobalt-based heat-resistant alloys for aerospace industry
allows to go beyond the temperature capabilities of nickel superalloys,
however, cobalt alloys are less resistant to high-temperature oxidation, and
alloying cobalt alloys with aluminum or chromium can lead to the formation of
brittle topologically dense phases. As a solution to this problem, surface
alloying with chromium of cobalt alloys is proposed, carried out by interaction
of their pre-oxidized surface with chromium from gas phase.
Key words: cobalt-rhenium
alloys, high-temperature oxidation, scanning electron microscopy, local X-ray
spectral analysis, X-ray phase analysis
Copyright (C) Chemistry Dept., Moscow State University, 2002
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