Influence of pulsed DC current and electric field on growth of carbide ceramics during spark plasma sintering
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概要
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The influence of the pulsed DC current and the electric field on the growth of TiC and ZrC layers using Spark Plasma Sintering was investigated at temperature ranging from 1373 to 1823K. From the results of XRD and EDS analyses, the product layer formed between Ti and C was only TiC, and the layer between Zr and C was only ZrC. In all systems, the thickness and the growth rate constant of the product layers were enhanced in the system with the current compared to that in the system with the negligible current. The activation energy for the TiC layer growth was calculated to be 269±3kJ/mol in the system with the current, which is smaller than the activation energy of 273±2kJ/mol in the system with the negligible current. In the Zr-C system, these values were 205±7kJ/mol and 224±1kJ/mol, respectively. The increase in the growth of the TiC and ZrC layers was unaffected by the current direction and suggested that the increased point defect mobility by passing the current was a dominant cause of the enhanced growth.
- 社団法人日本セラミックス協会の論文
- 2008-11-01
著者
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KODERA Yasuhiro
Department of Surgery II, Nagoya University Graduate School of Medicine
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KONDO Takayuki
Department of Immunology, National Institute of Neuroscience
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Kodera Yasuhiro
Department Of Materials Chemistry Innovative Materials And Processing Research Center Ryukoku Univer
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Munir Zuhair
Department Of Chemical Engineering And Materials Science University Of California
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Kondo Takayuki
Department Of Materials Chemistry And Innovation Materials And Research Center Ryukoku University
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Ohyanagi Manshi
Department Of Materials Chemistry Innovative Materials And Processing Research Center Ryukoku Univer
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Ohyanagi Manshi
Department Of Materials Chemistry Faculty Of Science And Technology Ryukoku University
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KURAMOTO Taku
Department of Materials Chemistry, Innovation Materials and Research Center, Ryukoku University
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Kondo Takayuki
Department Of Demyelinating Disease And Aging National Institute Of Neuroscience Ncnp
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Kondo Takayuki
Department of Chemical and Biochemical Engineering, Faculty of Engineering, Toyama University
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