Comparison of the grain growth behavior and defect structures of flash sintered ZnO with and without controlled current ramp. (15th March 2019)

• Record Type: Journal Article
• Authors: Phuah, Xin Li; Wang, Han; Charalambous, Harry; Jha, Shikhar Krishn; Tsakalakos, Thomas; Zhang, Xinghang; Wang, Haiyan
• Is Part Of: Scripta materialia. Number 162(2019)
• Page Start: 251
• Page End: 255
• Publication Date: 2019-03-15
• Subjects: Flash sintering -- Controlled current ramp -- ZnO -- Microstructure -- TEM; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.11.009
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: Unlabelled Image