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Materials-Metals 2017
Notes:
Page 45
November 16-17, 2017 Paris, France
13
th
Annual Conference on
Materials Science, Metal and Manufacturing
Journal of Materials Science and Nanotechnology
Volume 1 Issue 2
The effect of powder characteristic on the spark
plasma sintering of tungsten
Sung-Tag Oh
1
, Hyunji Kang
1
and
Young-Keun Jeong
2
1
Seoul National University of Science and Technology, Republic of Korea
2
Pusan National University, Republic of Korea
T
ungsten (W) is an excellent material for many engineering
applications such as heating source, aerospace and
military uses owing to its attractive properties such as
high melting point, high density, low coefficient of thermal
expansion and superior mechanical properties at elevated
temperatures. However, the densification of micro W
powders is very difficult and generally requires a temperature
over 2000
o
C because of its high melting point. To enhance
the densification of W powders, there are typically three
approaches such as activated sintering by the addition of
transition metals, nanosinteing by particle size refinement
and pressure sintering by assisted mechanical pressure.
Among the above approaches spark plasma sintering is the
promising method for fabrication of dense material. However,
there are few detailed studies on the effect of particle size and
processing parameters available in literature. The aim of this
work is, therefore, to investigate the densification behavior
and microstructure of W which have a variation in powder
characteristic such as particle size and size distribution and
sintering condition. To evaluate the effect of processing
condition on the densification behavior, different W powder
size, sintering temperatures and atmosphere were subject to
spark plasma sintering. This will help to optimize the sintering
process that should achieve the high density W bulk, and to
examine the properties related to their microstructure.
Biography
Sung-Tag Oh got his Dr. rer. nat. degree in the Faculty of Chemistry, University
of Stuttgart, Germany. He worked at Fine Ceramics Research Association in
Japan as a NEDO Researcher before he moved to Seoul National University
of Science and Technology, Korea. His expertise lies in the area of Porous
Materials, Nanocomposite Processing, and High Temperature Materials.
stoh@seoultech.ac.krSung-Tag Oh et al., Mater Sci Nanotechnol 2017, 1:2