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Enhanced efficiency of self-healing of Cr2AlC

Yang, H. J., Shao, X. H., Pei, Y. T., Zhang, Z. F. & De Hosson, J. T. M., 15-Sep-2018, In : Materials Letters. 227, p. 51-54 4 p.

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  • Enhanced efficiency of self-healing of Cr 2 AlC

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DOI

A method for a significant improvement of the self-healing efficiency of Cr2AlC ceramic via pre-oxidation is presented. Micro-notches were made with the focused ion beam technique on specimens with a preexisting oxides scale followed by an oxidation healing treatment. An interesting finding is that in the former case the notches are more effectively healed by producing a dense Al2O3 layer than the counterpart specimens without a pre-existing scale. An explanation for this phenomenon is provided based transmission electron microscopy revealing a transition layer between Cr2AlC and Al2O3 with a gradient distribution of chemical composition. (C) 2018 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalMaterials Letters
Volume227
Publication statusPublished - 15-Sep-2018

    Keywords

  • Electron microscopy, Diffusion, Defects, Alumina scale, Self-healing, Oxidation, TEMPERATURE OXIDATION BEHAVIOR, OXIDE-SCALE, TI2ALC, CERAMICS, AIR, TI3ALC2

ID: 71285007