Scientists from South Ural State University have created a new heat-resistant alloy for parts operating at ultra-high temperatures. In terms of operating time, it is approximately 2.6 times more effective than common aviation analogues.
The new development consists of aluminum, cobalt, chromium, nickel, and niobium. Aluminum and niobium are introduced in atomic fractions half as small as the other elements.
The heat-resistant alloy with a 'niobium armor' withstands 100 hours at a temperature of 1.1 thousand degrees. The qualities of its protective layer are 2.6 times more effective than similar materials widely used in aviation.
When heated to 1100 degrees, niobium forms double oxide compounds with aluminum and chromium, as well as special niobium-enriched crystals.
As a result, the specific mass gain over 100 hours is 1.363 mg/cm², whereas Inconel 617 would gain about 3.6 mg/cm² over an equivalent period. The structure of the new alloy remains dense, without cracks or delaminations.
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