Self-healing Mn+1AXn-phase ceramics

Ann-Sophie Farle

Research output: ThesisDissertation (TU Delft)

869 Downloads (Pure)

Abstract

Damage management and the development of new materials come together in selfhealing Mn+1AXn phase ceramics. These ternary layered carbides and nitrides exhibit a multitude of properties, such as high temperature strength, fracture toughness, thermal and electrical conductivity and machinability, which have been discovered over the past 20 years. In addition, intrinsic crack-gap filling and strength recovery by high temperature oxidation have been demonstrated for Ti2AlC, Cr2AlC and Ti3AlC2. The selective oxidation of the A-element, Aluminium in all known cases, leads to almost full crack gap closure by Al2O3 filling. The dense, strong and well adhering oxide is formed at temperatures above 1000 ±C in atmospheric air and can restore the integrity of a sample even formultiple successive crack-healing cycles.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Delft University of Technology
Supervisors/Advisors
  • van der Zwaag, S., Supervisor
  • Sloof, W.G., Advisor
Award date11 May 2017
Print ISBNs978-94-028-0626-7
DOIs
Publication statusPublished - 2017

Keywords

  • Ceramics
  • Self-healing
  • Oxidation

Fingerprint Dive into the research topics of 'Self-healing M<sub>n+1</sub>AX<sub>n</sub>-phase ceramics'. Together they form a unique fingerprint.

Cite this