Staged microstructural study of flash sintered titania

Han Wang; Xin Li Phuah; Harry Charalambous; Shikhar Krishn Jha; Jin Li; Thomas Tsakalakos; Xinghang Zhang; Haiyan Wang

doi:10.1016/j.mtla.2019.100451

Staged microstructural study of flash sintered titania

Han Wang, Xin Li Phuah, Harry Charalambous, Shikhar Krishn Jha, Jin Li, Thomas Tsakalakos, Xinghang Zhang, Haiyan Wang

School of Engineering, Materials Science & Engineering

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

Flash sintering offers more control of microstructure owing to its additional sintering conditions compared to conventional sintering, including electric field, current density limit and holding time. A systematic study of flash sintered TiO₂ is presented to investigate the effects of flash sintering conditions on the asymmetrical microstructure and defect structure across the two electrodes of the samples. Grain growth has been found to be more prominent near the positive electrode and significantly influenced by the current density limit. Extended defects, including dislocations and stacking faults, have been observed near the positive electrode and the defect density is highly dependent on the strength of electric field. Lowering the current density and holding time could maximize the defect density in TiO₂ for improved properties.

Original language	English (US)
Article number	100451
Journal	Materialia
Volume	8
DOIs	https://doi.org/10.1016/j.mtla.2019.100451
State	Published - Dec 2019

All Science Journal Classification (ASJC) codes

General Materials Science

Keywords

Defects
Flash sintering
Microstructure
TEM
Titania

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10.1016/j.mtla.2019.100451

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title = "Staged microstructural study of flash sintered titania",

abstract = "Flash sintering offers more control of microstructure owing to its additional sintering conditions compared to conventional sintering, including electric field, current density limit and holding time. A systematic study of flash sintered TiO2 is presented to investigate the effects of flash sintering conditions on the asymmetrical microstructure and defect structure across the two electrodes of the samples. Grain growth has been found to be more prominent near the positive electrode and significantly influenced by the current density limit. Extended defects, including dislocations and stacking faults, have been observed near the positive electrode and the defect density is highly dependent on the strength of electric field. Lowering the current density and holding time could maximize the defect density in TiO2 for improved properties.",

keywords = "Defects, Flash sintering, Microstructure, TEM, Titania",

author = "Han Wang and Phuah, {Xin Li} and Harry Charalambous and Jha, {Shikhar Krishn} and Jin Li and Thomas Tsakalakos and Xinghang Zhang and Haiyan Wang",

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doi = "10.1016/j.mtla.2019.100451",

language = "English (US)",

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AU - Wang, Han

AU - Phuah, Xin Li

AU - Charalambous, Harry

AU - Jha, Shikhar Krishn

AU - Li, Jin

AU - Tsakalakos, Thomas

AU - Zhang, Xinghang

AU - Wang, Haiyan

PY - 2019/12

Y1 - 2019/12

N2 - Flash sintering offers more control of microstructure owing to its additional sintering conditions compared to conventional sintering, including electric field, current density limit and holding time. A systematic study of flash sintered TiO2 is presented to investigate the effects of flash sintering conditions on the asymmetrical microstructure and defect structure across the two electrodes of the samples. Grain growth has been found to be more prominent near the positive electrode and significantly influenced by the current density limit. Extended defects, including dislocations and stacking faults, have been observed near the positive electrode and the defect density is highly dependent on the strength of electric field. Lowering the current density and holding time could maximize the defect density in TiO2 for improved properties.

AB - Flash sintering offers more control of microstructure owing to its additional sintering conditions compared to conventional sintering, including electric field, current density limit and holding time. A systematic study of flash sintered TiO2 is presented to investigate the effects of flash sintering conditions on the asymmetrical microstructure and defect structure across the two electrodes of the samples. Grain growth has been found to be more prominent near the positive electrode and significantly influenced by the current density limit. Extended defects, including dislocations and stacking faults, have been observed near the positive electrode and the defect density is highly dependent on the strength of electric field. Lowering the current density and holding time could maximize the defect density in TiO2 for improved properties.

KW - Defects

KW - Flash sintering

KW - Microstructure

KW - TEM

KW - Titania

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Staged microstructural study of flash sintered titania

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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