Influence of grain size on high temperature oxidation behavior of Cr2AlC ceramics
Source abstract
Abstract
Abstract The influence of grain size on the oxidation behavior of Cr 2 AlC at 1100 °C and 1200 °C for different times was investigated using fine grained (2 μm) and coarse grained (60 μm) samples. The two materials show a good oxidation resistance owing to the formation of a dense and continuous Al 2 O 3 layer. The oxidation rate of the fine grained Cr 2 AlC is relatively faster than that of the coarse grained Cr 2 AlC. The microstructure and phase composition of scale was characterized. After oxidation at 1100 °C and 1200 °C for long times up to 100 h, only a dense and continuous α -Al 2 O 3 oxide layer formed on both the fine grained and coarse grained Cr 2 AlC. However, after oxidation at 1100 °C for a relatively short 2 h period, a Cr 7 C 3 compound was detected beneath the α -Al 2 O 3 oxide layer on the coarse grained Cr 2 AlC, yet no Cr 7 C 3 was found in the fine grained Cr 2 AlC. The oxidation mechanism of the fine and the coarse grained Cr 2 AlC was discussed.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: MXene and MAX Phase Materials · Advanced ceramic materials synthesis · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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