Effects of the fundamental oxide properties on the electric field-flash temperature during flash sintering

SCRIPTA MATERIALIA

卷:163

Article

Chaim, Rachman¹  Estournes, Claude² 

[1] Technion Israel Inst Technol, Dept Mat Sci & Engn, IL-32000 Haifa, Israel

[2] Univ Paul Sabatier, Univ Toulouse, CIRIMAT, CNRS,INPT, 118 Route Narbonne, F-31062 Toulouse 9, France

关键词: Flash sintering;    Joule heating;    Oxides;    Crystal-type;    Ionic potential;   

DOI  :  10.1016/j.scriptamat.2019.01.018

来源: Elsevier

【 摘 要 】

Flash sintering of oxide powders is associated with dissipated power in the narrow range 10-50 W.cm(-3) irrespective of their composition. By analysis and normalization of the experimental results from literature to constant particle size (100 nm) and applied electric field (500 V cm(-1)), we show that the relative flash sintering temperature is dictated by the oxide crystal-type and its cation ionic potential resulting from its chemical composition. The expected flash onset temperature increases with the increase in fusion enthalpy and confirm the formation of liquid at the particle contacts as a mechanism for the powder densification. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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