Unravelling the impact of CoNiCrAlY coating microstructure and composition on the formation of duplex oxide scales
Source abstract
Abstract
The formation process of Al2O3-based duplex oxide scales growing on high velocity oxygen fuel (HVOF) CoNiCrAlY alloy was investigated at 1135 oC. The dual-phase nature of the alloy originated a site-specific oxidation behaviour that facilitated the formation of an inhomogeneous duplex oxide scale with widespread embedded mixed oxides. The early-stage formation of these oxides was explained by a modified Gaussian diffusion model where grain boundary proximity is the main variable. The subsequent nucleation/growth of mixed oxides with oxidation time was attributed to continuous cationic diffusion of non-aluminium elements across the scale enabled by the presence of cationic impurities in the scale.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · High Temperature Alloys and Creep
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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