Comparison of apparent activation energies for densification of alumina powders by pulsed electric current sintering (spark plasma sintering) and conventional sintering—toward applications for transparent polycrystalline alumina

2017 ◽  
Vol 32 (17) ◽  
pp. 3309-3318 ◽  
Author(s):  
Michael Stuer ◽  
Claude Paul Carry ◽  
Paul Bowen ◽  
Zhe Zhao
Keyword(s):  
Electric Current ◽  
Spark Plasma Sintering ◽  
Activation Energies ◽  
Polycrystalline Alumina ◽  
Plasma Sintering ◽  
Pulsed Electric Current ◽  
Conventional Sintering ◽  
Spark Plasma ◽  
Apparent Activation Energies ◽  
Image Position

Abstract

On the Preparation of Advanced Materials via Pulsed Electric Current Sintering Procedures

2016 ◽  
Vol 258 ◽  
pp. 436-439 ◽  
Author(s):  
Sebastián Díaz de la Torre ◽  
Ladislav Čelko ◽  
Mariano Casas Luna ◽  
Edgar Benjamin Montúfar Jimenéz
Keyword(s):  
Electric Current ◽  
Spark Plasma Sintering ◽  
Research Group ◽  
Advanced Materials ◽  
General Overview ◽  
Plasma Sintering ◽  
Pulsed Electric Current ◽  
Spark Plasma ◽  
3D Printed ◽  
Porous Substrates

A general overview on the processing of a series of advanced engineering materials, synthesized via pulsed-electric-current-sintering related techniques, and the similarities in between those techniques are introduced in this work. This paper is focused on two major techniques; namely, the Spark Plasma Extrusion (SPE) and Current Assisted Infiltration Sintering (CAIS), which in turn are derived from the Spark Plasma Sintering (SPS) technique, all widely used by this research group. Not only the geometry but also the microstructure of thus prepared specimens might vary depending on the selected technique. The resulting specimens can be under the forms of discs (flat or thick coin-like), rivets (enlarged cylindrical bars)-like and/or disclosing interpenetrated periodic networks with regular or irregular (either coin or rivet/screw)-like specimens, respectively. As for the CAIS technique, either 3D printed ceramic frameworks or naturally synthesized porous substrates (such as bone-like structures), can be infiltrated with virtually any metal or alloy. Among the series of produced materials we can include, for example: biomaterials such as: Ti-and Mg-hydroxyapatite, pure hydroxyapatite HA, composites, e.g., Al5083-CNT ́s, just to name a few. The expanding possibilities of SPS, SPE and CAIS techniques are briefly indicated here.

scholarly journals Processing of MMC through conventional sintering and spark plasma sintering process: A review

2020 ◽  
Vol 988 ◽  
pp. 012092
Author(s):  
B Stalin ◽  
M Ravichandran ◽  
M Balasubramanian ◽  
C Anand Chairman ◽  
D Pritima ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Conventional Sintering ◽  
Spark Plasma

Preparation and Magnetic Properties of Dense NiCuZn Ferrite by Spark Plasma Sintering

2008 ◽  
Vol 368-372 ◽  
pp. 601-603
Author(s):  
Xi Wei Qi ◽  
Ji Zhou ◽  
Zhen Xing Yue ◽  
Ming Ya Li ◽  
Xiu Mei Han
Keyword(s):  
Spark Plasma Sintering ◽  
Annealing Temperature ◽  
Annealing Treatment ◽  
Impurity Phase ◽  
Uniaxial Pressure ◽  
Plasma Sintering ◽  
Average Grain Size ◽  
Conventional Sintering ◽  
Spark Plasma ◽  
Nicuzn Ferrite

Dense NiCuZn ferrites consisting of fine grains were prepared by spark plasma sintering (SPS) at 750°C for 3 min under a uniaxial pressure of 15 MPa. The powders were densified to >95% of theoretical density by the SPS process, and the average grain size of the prepared NiCuZn ferrite was < 1 /m. The saturation magnetization of prepared specimens (without further annealing treatment) was approximate 50.54 emu/g, which was slightly smaller than that of 52.21 emu/g for specimens prepared by conventional sintering at 980°C for 4 h. Phase identifications indicated that prepared NiCuZn ferrite existed impurity phase (Cu2O), and Cu2O would gradually transform to CuO when annealing temperature increased.

The influence of the local effect of electric current on densification of tungsten powder during spark plasma sintering

2019 ◽  
Vol 356 ◽  
pp. 769-777 ◽  
Author(s):  
Shenghua Deng ◽  
Hongjin Zhao ◽  
Ruidi Li ◽  
Tiechui Yuan ◽  
Lanbo Li ◽  
...  
Keyword(s):  
Electric Current ◽  
Spark Plasma Sintering ◽  
Tungsten Powder ◽  
Local Effect ◽  
Plasma Sintering ◽  
Spark Plasma
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