期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 35, 期 1, 页码 37-45出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2014.08.046
关键词
Self-healing; MAX-phase ceramics; Crack filling; Adhesion; Selective oxidation
资金
- People Programe (Marie Curie ITN) of European Union [290308]
Recently, autonomous crack healing has been reported for Ti2AlC and Ti3AlC2 of the M(n+1)AX(n) (MAX) phase ceramics. The desirable healing behaviour is due to the formation of a stable, well-adhering oxide with a high relative volume expansion and having mechanical properties close to those of the matrix. The present analysis aims to predict the occurrence of similar autonomous high-temperature crack-healing behaviour in other MAX phase materials on the basis of postulated primary and secondary criteria analysing their reported thermodynamic, thermo-kinetic and mechanical properties. The analysis correctly identified Ti2AlC and Ti3AlC2 as suitable MAX phase variants for autonomous high-temperature crack healing. Also other Al-containing MAX phases seem promising, of which Ta2AlC and V2AlC were identified as worth a detailed investigation of their crack-healing behaviour. Of the Si-containing MAX phase compounds Ti3SiC2 met the criteria for autonomous high-temperature crack healing. (C) 2014 Elsevier Ltd. All rights reserved.
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