On the synchronicity of flash sintering and phase transformation

Yoon, Bola; Yadav, Devinder; Ghose, Sanjit; Sarin, Pankaj; Raj, Rishi

doi:10.1111/jace.16335

On the synchronicity of flash sintering and phase transformation

Journal Article · Tue Jan 29 23:00:00 EST 2019 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/jace.16335· OSTI ID:1498863

^[1]; Yadav, Devinder ^[2]; ^[3]; ^[4]; ^[1]

Univ. of Colorado, Boulder, CO (United States). Dept. of Mechanical Engineering. Materials Science and Engineering Program
Univ. of Colorado, Boulder, CO (United States). Dept. of Mechanical Engineering. Materials Science and Engineering Program; Indian Inst. of Technology Patna (India). Dept. of Metallurgical and Materials Engineering
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II
Oklahoma State Univ., Tulsa, OK (United States). School of Materials Science and Engineering

There is growing evidence that oxides of complex chemistries can be formed in one step by reactive flash sintering of their elemental constituents. We explore the temporal relationship between phase transformation and sintering by combining measurements of sintering with in situ measurements of phase transformation. The experiments are carried out under current rate, where flash is induced by injecting current and increasing it at a constant rate. We show that phase transformation of powders of magnesia and α-alumina into single-phase magnesium aluminate spinel was completed in 45 seconds, whereas sintering to full density required 60 seconds.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Army Research Office (ARO) (United States)

Grant/Contract Number:: SC0012704

OSTI ID:: 1498863

Alternate ID(s):: OSTI ID: 1494859

Report Number(s):: BNL--211353-2019-JAAM

Journal Information:: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 6 Vol. 102; ISSN 0002-7820

Publisher:: American Ceramic SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Liquid-Film Assisted Mechanism of Reactive Flash Sintering in Oxide Systems Chaim, Rachman; Amouyal, Yaron Materials, Vol. 12, Issue 9 https://doi.org/10.3390/ma12091494	journal	May 2019

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