Self-healing Mn+1AXn-phase ceramics

Ann-Sophie Farle

doi:10.4233/uuid:ef2e1c2c-f88b-4cca-b52d-b06e06822a22

Self-healing M_n+1AX_n-phase ceramics

Ann-Sophie Farle

Research output: Thesis › Dissertation (TU Delft)

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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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	Delft University of Technology
Supervisors/Advisors	van der Zwaag, S., Supervisor Sloof, W.G., Advisor
Award date	11 May 2017
Print ISBNs	978-94-028-0626-7
DOIs	https://doi.org/10.4233/uuid:ef2e1c2c-f88b-4cca-b52d-b06e06822a22
Publication status	Published - 2017

Keywords

Ceramics
Self-healing
Oxidation

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10.4233/uuid:ef2e1c2c-f88b-4cca-b52d-b06e06822a22

Self-Healing Mn+1AXn-Phase CeramicsFinal published version, 61 MB

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title = "Self-healing Mn+1AXn-phase ceramics",

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.",

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isbn = "978-94-028-0626-7",

type = "Dissertation (TU Delft)",

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AU - Farle, Ann-Sophie

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N2 - 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.

AB - 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.

KW - Ceramics

KW - Self-healing

KW - Oxidation

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DO - 10.4233/uuid:ef2e1c2c-f88b-4cca-b52d-b06e06822a22

M3 - Dissertation (TU Delft)

SN - 978-94-028-0626-7

ER -

Self-healing M_n+1AX_n-phase ceramics

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Keywords

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