Self-healing Mn+1AXn-phase ceramics

Doctoral thesis (2017)

Authors

A.M. Farle TU Delft (OLD) MSE-1

Contributors

S. van der Zwaag (promotor)
W.G. Sloof (copromotor)

Degree granting institution

Delft University of Technology

Research Group
(OLD) MSE-1
Copyright: © 2017 A.M. Farle
DOI
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https://doi.org/10.4233/uuid:ef2e1c2c-f88b-4cca-b52d-b06e06822a22
Oxidation Self-healing Ceramics
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Published Date

11-05-2017

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Research Group

(OLD) MSE-1

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.

Files

Dissertation.pdf
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