Towards developing Ti2AlC coatings with improved oxidation resistance via Nb solid solution
Source abstract
Abstract
Solid solution MAX phase coatings of (Ti 1-x, Nb x) 2 AlC, fabricated using a hybrid technique combining high-power impulse magnetron sputtering (HiPIMS) and DC magnetron sputtering (DCMS), were extensively evaluated for their oxidation resistance at 750 ℃. Compared to Ti 2 AlC, the oxidation rate of (Ti 1-x, Nb x) 2AlC significantly decreased, primarily due to the inhibition of non-protective TiO 2 oxide growth. A thin, single-layer oxide scale consisting of TiO 2 and Al 2O 3 formed on the (Ti 1-x, Nb x) 2AlC coatings, while the Ti 2AlC coatings were nearly completely consumed after 24 h oxidation. The substitution of Ti 4+ with Nb 5+ played a crucial role in reducing the number of oxygen vacancies and enhancing the oxidation resistance of Ti 2AlC.
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Research context
OpenAlex topics: MXene and MAX Phase Materials · Intermetallics and Advanced Alloy Properties · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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