A conceptual study into the potential of Mn+1AXn-phase ceramics for self-healing of crack damage. Issue 1 (January 2015)

• Record Type: Journal Article
• Authors: Farle, Ann-Sophie; Kwakernaak, Cees; van der Zwaag, Sybrand; Sloof, Willem G.
• Is Part Of: Journal of the European Ceramic Society. Volume 35:Issue 1(2015:Jan.)
• Page Start: 37
• Page End: 45
• Publication Date: 2015-01
• Subjects: Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2014.08.046
• Languages: English
• ISSNs: 0955-2219

Abstract

<abstract abstract-type="author" id="abs0005"> <title id="sect0005">Abstract</title> <sec> <p id="spar0005">Recently, autonomous crack healing has been reported for Ti₂AlC and Ti₃AlC₂ of the M_{<italic>n</italic>+1}AX_{<italic>n</italic>} (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.</p> </sec> </abstract>