title: Effect of heat wave at the initial stage in spark plasma sintering.
abstract: Thermal effects are important considerations at the initial stage in spark plasma sintering of non-conductive Al2O3 powders. The generalized thermo-elastic theory is introduced to describe the influence of the heat transport and thermal focusing caused by thermal wave propagation within a constrained space and transient time. Simulations show that low sintering temperature can realize high local temperature because of the superposition effect of heat waves. Thus, vacancy concentration differences between the sink and the cross section of the particles increase relative to that observed during pressure-less and hot-pressure sintering. Results show that vacancy concentration differences are significantly improved during spark plasma sintering, thereby decreasing the time required for sintering.
authors.affiliation: Department of Engineering Mechanics, Chongqing University, Chongqing, 400044 China ; Department of Theoretical and Applied Mechanics, Chongqing University of Science and Technology, Chongqing, 401331 China.
authors.forename: Long
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Engineering Mechanics, Chongqing University, Chongqing, 400044 China.
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Engineering Mechanics, Chongqing University, Chongqing, 400044 China.
authors.forename: Zhongxiang
authors.initials: Z
authors.lastname: Chu
authors.affiliation: Department of Engineering Mechanics, Chongqing University, Chongqing, 400044 China.
authors.forename: Song
authors.initials: S
authors.lastname: Peng
authors.affiliation: Department of Engineering Mechanics, Chongqing University, Chongqing, 400044 China.
authors.forename: Zimin
authors.initials: Z
authors.lastname: Yan
authors.affiliation: School of Foreign Language, Chongqing University of Science and Technology, Chongqing, 401331 China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liang
keywords: Field assisted sintering; Heat wave; Spark plasma sintering; Thermo-mechanical coupling; Vacancy concentration difference