Finite element modeling of spark plasma sintering: Application to the reduction of temperature inhomogeneities, case of alumina

Achenani, Youssef; Saâdaoui, Malika; Cheddadi, Abdesselam; Bonnefont, Guillaume; Fantozzi, Gilbert

doi:10.1016/j.matdes.2016.12.054

Cited by 53 publications

(40 citation statements)

References 35 publications

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“…In solving of the thermoelectric problem, the basic equations were the heat conduction equation with the heat release function and the electric field equations describing the electric current passage through the material. The problem was considered in an axisymmetric formulation, where the temperature T (r, z, t) is a function of the time t and of the cylindrical coordinates z and r [17]:…”

Section: Methodsmentioning

confidence: 99%

Heating Kinetics Simulation During Spark-Plasma Sintering of Non-Conductive Materials

Rubinkovskiy

Zholnin

2018

Kms

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The simulation of aluminum oxide spark-plasma sintering has been carried out during this research, namely the temperature field distribution in the sample volume and mold at different heating phases. The research work was based on experimental data on the measurement of temperature on the matrix surface, in its hole and various internal parts, including the punches, in the absence of thermal insulating felt. It was experimentally discovered that the key source of heat release up to temperatures 1300-1400 ∘ C is the contact resistance at the matrix punch boundaries.Then the heat dissipation zone moves towards the punches. The collected data helped to figure out thermal and electrical parameters for the materials used in the die mold. They provided a good coincidence of the observed and calculated figures of heat distribution at different temperatures. The parameters helped to calculate the temperature fields in the die molds with heat-insulating felts.

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Section: Methodsmentioning

confidence: 99%

Heating Kinetics Simulation During Spark-Plasma Sintering of Non-Conductive Materials

Rubinkovskiy

Zholnin

2018

Kms

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“…Stresses distribution was studied by Wang et al [2] in the case of SPS process with classical die, as it was used in previous work [3]. The use of a high pressure die in the SPS configuration allows applying very high pressures compared to conventional hot pressure.…”

Section: Introductionmentioning

confidence: 99%

Thermal-Electrical-Mechanical Simulation of High Pressure Spark Plasma Sintering (HP-SPS) Process

et al. 2019

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In the present work, we investigate the stresses distribution using a high pressure die during SPS (spark plasma sintering) experiments. In this context, we used a finite element modeling (FEM) in the case of the sintering of an alumina sample, chosen as an electrically insulator ceramic material. A thermal sintering cycle is imposed using a control pyrometer of temperature at the SiC inner die surface.

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“…This temperature gradient was confirmed by various studies on FEM modeling of the PECS process. 8,9,11) According to FEM modelling, Wang et al reported that the temperature at the center of Al 2 O 3 samples was 3040°C higher than at the edge of the samples. 9) The difference in temperature distribution in samples during the sintering process strongly depended on the sintering size.…”

Section: Introductionmentioning

confidence: 99%

Densification and Grain Growth of Large-Sized Polycrystalline Al<sub>2</sub>O<sub>3</sub> during a Two-Step Pulsed Electric Current Sintering Process

Nguyen¹,

Nanko²

2018

Mater. Trans.

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In this study, transparent polycrystalline Al 2 O 3 with a diameter of 30 mm was fabricated by two-step pulsed electric current sintering (TS-PECS) at two different heating rates, 100 and 10°C/min. The overall TS-PECS process was divided into parts and was stopped at various positions along the timeline. The relative density and grain size of the Al 2 O 3 samples obtained from each stop were evaluated. In general, the results show that the heating rate changed the densification rate in each sintering stage but did not strongly affect the final density. However, it dramatically influenced the grain growth of Al 2 O 3 . With the higher heating rate, the dynamic grain growth was assumed to enhance the grain growth rate because of the high concentration of defects, especially in the last stage of sintering. Especially, a grain size refinement phenomena was observed during the sintering process of polycrystalline Al 2 O 3 for the first time. [

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Finite element modeling of spark plasma sintering: Application to the reduction of temperature inhomogeneities, case of alumina

Cited by 53 publications

References 35 publications

Heating Kinetics Simulation During Spark-Plasma Sintering of Non-Conductive Materials

Heating Kinetics Simulation During Spark-Plasma Sintering of Non-Conductive Materials

Thermal-Electrical-Mechanical Simulation of High Pressure Spark Plasma Sintering (HP-SPS) Process

Densification and Grain Growth of Large-Sized Polycrystalline Al<sub>2</sub>O<sub>3</sub> during a Two-Step Pulsed Electric Current Sintering Process

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