Plasma-induced repair of macro-indentation formed cracks on yttria-stabilised zirconia

Fangzhou Shi; Behnam Dashtbozorg; Wing Kwong Wong; Xiaoying Li; Hanshan Dong

doi:10.1016/j.scriptamat.2024.116278

Plasma-induced repair of macro-indentation formed cracks on yttria-stabilised zirconia

Fangzhou Shi, Behnam Dashtbozorg^*, Wing Kwong Wong, Xiaoying Li, Hanshan Dong

^*Corresponding author for this work

Metallurgy and Materials

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Abstract

Low-pressure (300 Pa) plasma treatments (N2 gas at 500 °C for 10 h) offer a novel approach to induce crack-healing phenomena, at both the surface and sub-surface, of yttria-stabilised zirconia (YSZ). The plasma-induced restoration process is visualised by surface and transverse imaging using a combination of optical and SEM imaging with in-situ laser milling. XRD and Raman mapping of restored cracks (created using 5 and 20 kgf Vickers indentations) reveal that plasma treatments lead to significantly greater tetragonal to monoclinic phase transition surrounding indents, which enable cracks to close beyond the inherent passive transformation toughening behaviour of YSZ. The findings of this study can help to pave the way towards future repair of damaged YSZ surfaces without the use of healing agents.

Original language	English
Article number	116278
Journal	Scripta Materialia
Volume	252
Early online date	25 Jul 2024
DOIs	https://doi.org/10.1016/j.scriptamat.2024.116278
Publication status	Published - 1 Nov 2024

Bibliographical note

Acknowledgements
The authors are grateful to the Centre for Electron Microscopy at the University of Birmingham for access to the Helios-5 Laser Hydra UX microscope that was made possible by the EPSRC grant (EP/T31379/1). One of the authors, F.S, would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1).

Keywords

Ceramics
Crack-healing
Surface structure
Phase transformations
Raman spectroscopy

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10.1016/j.scriptamat.2024.116278Licence: Creative Commons: Attribution (CC BY)

ShiF2024Plasma-inducedFinal published version, 3.69 MBLicence: Creative Commons: Attribution (CC BY)

https://linkinghub.elsevier.com/retrieve/pii/S1359646224003130

Towards Anti-Microbial Multifunctional Stainless Steel Surfaces: Active-Screen Plasma Surface Alloying with C, N, Ag and Cu
Dong, H. (Principal Investigator), Bell, T. (Co-Investigator) & Li, X. (Co-Investigator)
Engineering & Physical Science Research Council
1/01/08 → 30/06/11
Project: Research Councils

Cite this

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title = "Plasma-induced repair of macro-indentation formed cracks on yttria-stabilised zirconia",

abstract = "Low-pressure (300 Pa) plasma treatments (N2 gas at 500 °C for 10 h) offer a novel approach to induce crack-healing phenomena, at both the surface and sub-surface, of yttria-stabilised zirconia (YSZ). The plasma-induced restoration process is visualised by surface and transverse imaging using a combination of optical and SEM imaging with in-situ laser milling. XRD and Raman mapping of restored cracks (created using 5 and 20 kgf Vickers indentations) reveal that plasma treatments lead to significantly greater tetragonal to monoclinic phase transition surrounding indents, which enable cracks to close beyond the inherent passive transformation toughening behaviour of YSZ. The findings of this study can help to pave the way towards future repair of damaged YSZ surfaces without the use of healing agents.",

keywords = "Ceramics, Crack-healing, Surface structure, Phase transformations, Raman spectroscopy",

author = "Fangzhou Shi and Behnam Dashtbozorg and Wong, \{Wing Kwong\} and Xiaoying Li and Hanshan Dong",

note = "Acknowledgements The authors are grateful to the Centre for Electron Microscopy at the University of Birmingham for access to the Helios-5 Laser Hydra UX microscope that was made possible by the EPSRC grant (EP/T31379/1). One of the authors, F.S, would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1).",

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T1 - Plasma-induced repair of macro-indentation formed cracks on yttria-stabilised zirconia

AU - Shi, Fangzhou

AU - Dashtbozorg, Behnam

AU - Wong, Wing Kwong

AU - Li, Xiaoying

AU - Dong, Hanshan

N1 - Acknowledgements The authors are grateful to the Centre for Electron Microscopy at the University of Birmingham for access to the Helios-5 Laser Hydra UX microscope that was made possible by the EPSRC grant (EP/T31379/1). One of the authors, F.S, would also like to thank the studentship from the Centre for Doctoral Training in Innovative Metal Processing (IMPaCT) funded by EPSRC, UK (EP/F006926/1).

PY - 2024/11/1

Y1 - 2024/11/1

N2 - Low-pressure (300 Pa) plasma treatments (N2 gas at 500 °C for 10 h) offer a novel approach to induce crack-healing phenomena, at both the surface and sub-surface, of yttria-stabilised zirconia (YSZ). The plasma-induced restoration process is visualised by surface and transverse imaging using a combination of optical and SEM imaging with in-situ laser milling. XRD and Raman mapping of restored cracks (created using 5 and 20 kgf Vickers indentations) reveal that plasma treatments lead to significantly greater tetragonal to monoclinic phase transition surrounding indents, which enable cracks to close beyond the inherent passive transformation toughening behaviour of YSZ. The findings of this study can help to pave the way towards future repair of damaged YSZ surfaces without the use of healing agents.

AB - Low-pressure (300 Pa) plasma treatments (N2 gas at 500 °C for 10 h) offer a novel approach to induce crack-healing phenomena, at both the surface and sub-surface, of yttria-stabilised zirconia (YSZ). The plasma-induced restoration process is visualised by surface and transverse imaging using a combination of optical and SEM imaging with in-situ laser milling. XRD and Raman mapping of restored cracks (created using 5 and 20 kgf Vickers indentations) reveal that plasma treatments lead to significantly greater tetragonal to monoclinic phase transition surrounding indents, which enable cracks to close beyond the inherent passive transformation toughening behaviour of YSZ. The findings of this study can help to pave the way towards future repair of damaged YSZ surfaces without the use of healing agents.

KW - Ceramics

KW - Crack-healing

KW - Surface structure

KW - Phase transformations

KW - Raman spectroscopy

U2 - 10.1016/j.scriptamat.2024.116278

DO - 10.1016/j.scriptamat.2024.116278

M3 - Article

SN - 1359-6462

VL - 252

JO - Scripta Materialia

JF - Scripta Materialia

M1 - 116278

ER -

Plasma-induced repair of macro-indentation formed cracks on yttria-stabilised zirconia

Abstract

Bibliographical note

Keywords

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Projects

Towards Anti-Microbial Multifunctional Stainless Steel Surfaces: Active-Screen Plasma Surface Alloying with C, N, Ag and Cu

Cite this