Ultra-fast firing: Effect of heating rate on sintering of 3YSZ, with and without an electric field. Issue 6 (June 2017)

• Record Type: Journal Article
• Authors: Ji, W.; Parker, B.; Falco, S.; Zhang, J.Y.; Fu, Z.Y.; Todd, R.I.
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 6(2017)
• Page Start: 2547
• Page End: 2551
• Publication Date: 2017-06
• Subjects: Flash sintering -- Fast firing -- YSZ -- FAST -- Joule heating; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.01.033
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: It has recently been reported that ceramics can be sintered in a few seconds with the aid of an electric field ("flash sintering"). This investigation tests the possibility that the accelerated sintering is a consequence of the rapid heating rate involved rather than a direct effect of the electric field on mass transport. The sintering of 3YSZ powder compacts at a temperature of ∼1300 °C was compared (i) in flash sintering, (ii) with rapid heating rates produced without the application of an electric field, and (iii) with conventional heating rates. The results show that rapid heating can accelerate sintering by over 2 orders of magnitude compared with heating to the same temperature at conventional rates, even without the application of an electric field. It is concluded that the rapid densification in flash sintering of 3YSZ is at least partly a consequence of the rapid heating involved. Possible explanations are discussed.