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Anisotropic corrosion of Ti2AlC and Ti3AlC2in supercritical water at 500 ºC
Du, Yina1,3; Liu, Ji-Xuan2; Gu, Yifeng1,3; Wang, Xin-Gang1; Xu, Fangfang1; Zhang, Guo-Jun2
2017
Source PublicationCeramics International
ISSN02728842
Volume43Issue:9Pages:7166-7171
AbstractTextured and untextured Mn+1AXncompounds, Ti2AlC and Ti3AlC2, namely MAX phases have been synthesized and examined with respect to their corrosion resistance in static supercritical water at 500 °C. The textured ceramics were obtained by hot forging process at high temperatures. Both X-ray diffraction and SEM analysis revealed well alignment of c-plane of MAX phases parallel to the hot-forging surface. Better corrosion resistance on the surface perpendicular to the hot-forged direction was verified by SEM. On the other hand, the side surfaces of the samples showed thick oxidation layers and abundant cracks. The (00l) faces consist of strongly bonded Ti3C2and Ti2C layers in Ti3AlC2and Ti2AlC, respectively, hence exhibit higher resistance to water corrosion. On the contrary, the side surfaces where most of weakly bonded interlayers of these hexagonal phases were exposed tend to be easily corroded especially through Al-layers. The corrosion process involved a phase transition of oxidized product, i.e. TiO2from anatase to rutile phase, which gave rise to the formation of cracks due to accompanied volume changes. © 2017 Elsevier Ltd and Techna Group S.r.l.
DOI10.1016/j.ceramint.2017.02.153
EI Accession Number20171003425896
EI KeywordsAluminum compounds
EI Classification Number445.1 Water Treatment Techniques - 482.2 Minerals - 535.2.2 Metal Forming Practice - 539.1 Metals Corrosion - 804.2 Inorganic Compounds - 812.1 Ceramics - 931.2 Physical Properties of Gases, Liquids and Solids - 951 Materials Science
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25496
Collection中国科学院上海硅酸盐研究所
Affiliation1.State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
2.State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, Donghua University, Shanghai; 201620, China;
3.University of Chinese Academy of Sciences, Beijing; 100049, China
Recommended Citation
GB/T 7714
Du, Yina,Liu, Ji-Xuan,Gu, Yifeng,et al. Anisotropic corrosion of Ti2AlC and Ti3AlC2in supercritical water at 500 ºC[J]. Ceramics International,2017,43(9):7166-7171.
APA Du, Yina,Liu, Ji-Xuan,Gu, Yifeng,Wang, Xin-Gang,Xu, Fangfang,&Zhang, Guo-Jun.(2017).Anisotropic corrosion of Ti2AlC and Ti3AlC2in supercritical water at 500 ºC.Ceramics International,43(9),7166-7171.
MLA Du, Yina,et al."Anisotropic corrosion of Ti2AlC and Ti3AlC2in supercritical water at 500 ºC".Ceramics International 43.9(2017):7166-7171.
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