A novel method to promote selective oxidation of Ni-Cr alloys: Surface spreading α-Al2O3 nanoparticles
Source abstract
Abstract
Abstract Following Wagner’s classical oxidation theory, we suppose that a Ni-Cr alloy with the Cr concentration below the critical N Cr 1 (0.24) required for external Cr2O3 scale formation but above the critical N Cr ( 2 ) (0.1) required for its steady-state growth, would be converted from a NiO former to a Cr2O3 former, if the selective Cr oxidation of the binary alloy can be catalyzed at the beginning of oxidation. As is expected, spreading α-Al2O3 nanoparticles on the surface of Ni-10Cr (NCr = 0.11) does cause it to become a Cr2O3 former during oxidation at 800 °C. The α-Al2O3 effect on oxidation is interpreted.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Catalytic Processes in Materials Science · Advanced materials and composites
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References (18)
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