Comparison of the grain growth behavior and defect structures of flash sintered ZnO with and without controlled current ramp

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

Research output: Contribution to journalArticle

1 Citations (Scopus)

Abstract

During the flash sintering of ceramics, rapid densification occurs during the non-linear increase in current. To investigate the effect of an abrupt increase in current, a detailed microstructure characterization of flash sintered ZnO samples has been conducted and compared to a sample with controlled current ramp (i.e., linear increase of current). It has been found that the rapid densification during flash sintering limits the grain growth leading to finer grain sizes compared to the sample with a controlled current ramp. Stacking faults have been observed in the microstructure of both samples due to the generation of point defects.

Original languageEnglish (US)
Pages (from-to)251-255
Number of pages5
JournalScripta Materialia
Volume162
DOIs
StatePublished - Mar 15 2019
Externally publishedYes

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Defect structures
ramps
Grain growth
Densification
flash
Sintering
Microstructure
defects
Stacking faults
Point defects
densification
sintering
microstructure
crystal defects
point defects
grain size
ceramics

Cite this

Phuah, Xin Li ; Wang, Han ; Charalambous, Harry ; Jha, Shikhar Krishn ; Tsakalakos, Thomas ; Zhang, Xinghang ; Wang, Haiyan. / Comparison of the grain growth behavior and defect structures of flash sintered ZnO with and without controlled current ramp. In: Scripta Materialia. 2019 ; Vol. 162. pp. 251-255.
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Comparison of the grain growth behavior and defect structures of flash sintered ZnO with and without controlled current ramp. / Phuah, Xin Li; Wang, Han; Charalambous, Harry; Jha, Shikhar Krishn; Tsakalakos, Thomas; Zhang, Xinghang; Wang, Haiyan.

In: Scripta Materialia, Vol. 162, 15.03.2019, p. 251-255.

Research output: Contribution to journalArticle

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