Inhibition of grain growth during the final stage of multi-stage spark plasma sintering of oxide ceramics

2010 ◽  
Vol 63 (6) ◽  
pp. 585-588 ◽  
Author(s):  
K. Madhav Reddy ◽  
Nitish Kumar ◽  
Bikramjit Basu
Keyword(s):  
Grain Growth ◽  
Spark Plasma Sintering ◽  
Final Stage ◽  
Oxide Ceramics ◽  
Plasma Sintering ◽  
Multi Stage ◽  
Spark Plasma

Grain growth kinetics in CoCrFeNi and CoCrFeMnNi high entropy alloys processed by spark plasma sintering

2019 ◽  
Vol 791 ◽  
pp. 1114-1121 ◽  
Author(s):  
M. Vaidya ◽  
Ameey Anupam ◽  
J. Vijay Bharadwaj ◽  
Chandan Srivastava ◽  
B.S. Murty
Keyword(s):  
Grain Growth ◽  
Spark Plasma Sintering ◽  
Growth Kinetics ◽  
High Entropy Alloys ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Grain Growth Kinetics

The Effect of Sb Content on Spark Plasma Sintered High-Density Antimony-Doped Tin Oxide Ceramics

2011 ◽  
Vol 687 ◽  
pp. 204-208 ◽  
Author(s):  
Qi Zhong Li ◽  
Dong Ming Zhang ◽  
Guo Qiang Luo ◽  
Cheng Zhang Li ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Tin Oxide ◽  
Sintering Temperature ◽  
Glass Melting ◽  
High Density ◽  
Oxide Ceramics ◽  
Sintering Aids ◽  
Maximum Value ◽  
Plasma Sintering ◽  
Spark Plasma

Spark plasma sintering (SPS) is a newly developed technique that enables poorly sinterable tin oxide powder to be fully densified. Sintering without sintering aids is of great importance when SnO2ceramics are used as electrodes in the glass melting industry and aluminum electrometallurgy. Dense and good-conductive Antimony-doped SnO2 ceramics can be achieved by SPS at a lower sintering temperature and in a shorter time. When the Sb2O3concentration is 1.0 mol%, the densities of the samples reach their maximum value, which is 98.2% of the theoretical value. When the content of Sb2O3was 2.44mol%, SnO2ceramics with densities 97.6% can be obtained at 800°C-1000°C, and the resistivity was about 5.19×10-2Ω.cm at the sintering temperature of 1000°C. Defined amount of Sb3+used in our research are beneficial to low the sintering temperature and promote the densification of SnO2ceramics

NdFeB Type Magnets Produced by Spark Plasma Sintering

2014 ◽  
Vol 802 ◽  
pp. 585-589 ◽  
Author(s):  
M. Alberteris Campos ◽  
N. Vicente ◽  
I.F. Machado ◽  
K.S.T. de Souza ◽  
D. Rodrigues ◽  
...  
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Spark Plasma Sintering ◽  
Alloying Element ◽  
Consolidation Process ◽  
Ndfeb Magnets ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Typical Temperature

The shortage of dysprosium as an alloying element has directed the research on the grain size refining of NdFeB, since higher coercivities can be obtained by decreasing the grain size, without Dy addition. The Spark Plasma Sintering (SPS) is a consolidation process which allows densification at lower temperatures and shorter dwell times of sintering, thus avoiding the grain growth. Therefore, the typical temperature of sintering of NdFeB magnets can be decreased from 1050°C to around 800°C, as it was evidenced by means of SPS shrinkage curves and the high densified microestructure obtained in this work.

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