首页|Oxidation Resistance of In Situ Reaction/Hot Pressing Synthesized Ti2AlC-20％TiB2 Composite at 600-900 ℃ in Air
Oxidation Resistance of In Situ Reaction/Hot Pressing Synthesized Ti2AlC-20％TiB2 Composite at 600-900 ℃ in Air
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The oxidation behavior and kinetics of Ti2AlC-20vol.％TiB2 composite at 600-900 ℃ in air were investigated.The results showed that the oxidation kinetics of the composite followed a logarithmic law within the given temperature range,which indicated that the composites had excellent oxidation resistance.The selective oxidation of Al in Ti2AlC was greatly enhanced,which facilitated the formation of a continuous and dense protective layer of Al2O3.Meanwhile,the existence of molten B2O3 inhibited the outward diffusion of Ti and inward diffusion of oxygen,which prevented the growth of anatase TiO2 at 600 ℃ and rutile TiO2 at 700-900 ℃.Therefore,the incorporation of TiB2 completely inhibited the abnormally rapid oxidation of bulk Ti2AlC at 600 ℃ and improved its oxidation resistance at 700-900 ℃.
MAX phaseTi2AlC-TiB2 compositeIntermediate temperature oxidationOxidation kinetics
Wenting Wang、Jingjun Xu、Jun Zuo、Ke Ma、Yang Li、Guangqi He、Meishuan Li
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Shengyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China
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