scholarly journals Flash Spark Plasma Sintering of 3YSZ: Modified Sintering Pathway and Impact on Grain Boundary Formation

2021 ◽  
Author(s):  
Thomas Hérisson de Beauvoir ◽  
Zakaria Ghomari ◽  
Geoffroy Chevallier ◽  
Andréas Flaureau ◽  
Alicia Weibel ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Formation ◽  
Plasma Sintering ◽  
Spark Plasma

High Hardness BaCb-(BxOy/BN) Composites with 3D Mesh-Like Fine Grain-Boundary Structure by Reactive Spark Plasma Sintering

2012 ◽  
Vol 12 (2) ◽  
pp. 959-965 ◽  
Author(s):  
Oleg Vasylkiv ◽  
Hanna Borodianska ◽  
Petre Badica ◽  
Salvatore Grasso ◽  
Yoshio Sakka ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
High Hardness ◽  
Boundary Structure ◽  
3D Mesh ◽  
Fine Grain ◽  
Grain Boundary Structure ◽  
Plasma Sintering ◽  
Spark Plasma

Grain boundary diffusion driven spark plasma sintering of nanocrystalline zirconia

2012 ◽  
Vol 38 (5) ◽  
pp. 4385-4389 ◽  
Author(s):  
Hanna Borodianska ◽  
Dmytro Demirskyi ◽  
Yoshio Sakka ◽  
Petre Badica ◽  
Oleg Vasylkiv
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Nanocrystalline Zirconia

scholarly journals Thermo-electro-mechanical modeling of spark plasma sintering processes accounting for grain boundary diffusion and surface diffusion

2021 ◽  
Vol 67 (5) ◽  
pp. 1395-1407
Author(s):  
A. S. Semenov ◽  
J. Trapp ◽  
M. Nöthe ◽  
O. Eberhardt ◽  
B. Kieback ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Surface Diffusion ◽  
Spark Plasma Sintering ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Experimental Results ◽  
Interparticle Contact ◽  
Mechanical Problem ◽  
Plasma Sintering ◽  
Spark Plasma

AbstractIn the present research, a numerical modeling approach of the initial stage of consolidation during spark plasma sintering on the microscopic scale is presented. The solution of a fully coupled thermo-electro-mechanical problem also accounting for grain boundary and surface diffusion is found by using a staggered way. The finite-element method is applied for solving the thermo-electro-mechanical problem while the finite-difference method is applied for the diffusion problem. A Lagrange-based non-linear formulation is used to deal with the detailed description of plastic and creep strain accumulation. The numerical model is developed for simulating the structural evolution of the involved particles during sintering of powder compacts taking into account both the free surface diffusion of the particles and the grain boundary diffusion at interparticle contact areas. The numerical results obtained by using the two-particle model—as a representative volume element of the powder—are compared with experimental results for the densification of a copper powder compact. The numerical and experimental results are in excellent agreement.

Densification mechanism involved during spark plasma sintering of a codoped α-alumina material: Part I. Formal sintering analysis

2009 ◽  
Vol 24 (1) ◽  
pp. 179-186 ◽  
Author(s):  
G. Bernard-Granger ◽  
C. Guizard
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Diffusion ◽  
Grain Boundary Sliding ◽  
Alumina Powder ◽  
Densification Mechanism ◽  
Material Part ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Boundary Sliding

Spark plasma sintering (SPS) of a codoped α-alumina powder has been investigated at temperatures between 850 and 1200 °C. The “grain size versus relative density” trajectory showed a significant grain growth as soon as the residual porosity closed. The densification mechanism was determined by anisothermal (investigation of the heating part of a SPS run) and isothermal methods. It was proposed that grain-boundary sliding, accommodated by oxygen grain-boundary diffusion, governed densification.

Grain Size Effect in the Electrical Properties of Nanostructured Functional Oxides through Pressure Modification of the Spark Plasma Sintering Method

2011 ◽  
Vol 484 ◽  
pp. 107-116 ◽  
Author(s):  
D.V. Quach ◽  
S. Kim ◽  
R.A. De Souza ◽  
Manfred Martin ◽  
Z.A. Munir
Keyword(s):  
Grain Size ◽  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Functional Oxides ◽  
Boundary Area ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
20 Nm ◽  
Sintering Method

Through the use of a high-pressure modification of the spark plasma sintering method, it was possible to consolidate functional oxides (yttria- stabilized zirconia and doped ceria) to high densities and retain a grain size of < 20 nm. The role of the pressure on densification and on the grain size of the sintered samples was demonstrated. The pressure had a marked effect on density at relatively low temperature but an insignificant effect at relatively high temperature. It was found that when prepared with such small grain sizes, these oxides conduct protonically even at temperatures as low as room temperature. The dependence of the protonic conductivity is stronger dependence on grain size than what can be anticipated from a geometric consideration based on an increase in grain boundary area. This observation strongly suggests that factors other than an increase in grain boundary area play a role, a consideration that is being further investigated.

Grain-boundary diffusion coefficient in α-Al2O3 from spark plasma sintering tests: Evidence of collective motion of charge disconnections

2018 ◽  
Vol 44 (15) ◽  
pp. 19044-19048 ◽  
Author(s):  
Yoshihiro Tamura ◽  
Eugenio Zapata-Solvas ◽  
Bibi Malmal Moshtaghioun ◽  
Diego Gómez-García ◽  
Arturo Domínguez-Rodríguez
Keyword(s):  
Diffusion Coefficient ◽  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Diffusion ◽  
Collective Motion ◽  
Grain Boundary Diffusion ◽  
Plasma Sintering ◽  
Boundary Diffusion Coefficient ◽  
Spark Plasma ◽  
Α Al2o3

Fabrication and Mechanical Properties of ultra fine WC-6wt.%Co by Spark Plasma Sintering Process

2011 ◽  
Vol 49 (01) ◽  
pp. 40-45 ◽  
Author(s):  
Hyun-Kuk Park ◽  
Seung-Min Lee ◽  
Hee-Jun Youn ◽  
Ki-Sang Bang ◽  
Ik-Hyun Oh
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Spark Plasma
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