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.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Fabrication and ion-irradiation response of SiC
f
/SiC with different sintering additives for nuclear
reactor applications
Pipit Fitriani, Amit Siddharth Sharma, Dong Hyuk Jeong and Dang-Hyok Yoon
Yeungnam University, Republic of Korea
S
iC
f
/SiC for the structural components of Gen-IV fission and future fusion reactors has attracted considerable interest due
to their excellent mechanical and thermal properties along with impressive post-irradiation response. Various fabrication
routes (CVI, PIP, RS etc.) have already been reported with simultaneous ongoing efforts to develop newer routes that can yield
improved properties. We report here a hybrid processing technique based on Electrophoretic Deposition (EPD) or vacuum
infiltration as matrix infiltration route and subsequent hot pressing to fabricate dense and tough SiC
f
/SiC. The adaptability of
EPD process to fabricate tubular and planar SiC
f
/SiC of varying sizes with tailorable properties has been demonstrated. Careful
optimization of material-attributes, such as slurry composition, type and amount of sintering additives, pre-coated SiC fabric
with PyC or dual PyC-SiC interphase and processing-attributes for e.g., AC-/DC-EPD, temperature and pressure variations
etc., were performed. Addition of Al
2
O
3
-Y
2
O
3
, Al
2
O
3
-Sc
2
O
3
, and Sc-nitrate additives to facilitate liquid phase sintering in a
processing window of 1650/1750 °C and 10/20 MPa were attempted to obtain high densities (> 95%
ρtheo
) and flexural strengths
(450-500 MPa) with non-brittle and predictable flexural behavior. Subsequently, room temperature irradiation of SiC
f
/SiC
under 0.2 MeV H
+
ions at a fluence level of 3×10
20
ions/m
2
was conducted. Comparative microstructural assessment of matrix,
fabric and interfacial regions were undertaken to explain the observed flexural behavior of SiC
f
/SiC with different additives.
Subsequently, post-irradiation evolution of microstructural features, such as matrix grain size, pores, cracks, surface roughness
and corresponding flexural responses were recorded and contrasted.
Biography
Pipit Fitriani is currently a PhD student at School of Materials Science and Engineering, Yeungnam University, Republic of Korea. she is currently working on
fabrication of SiC
f
/SiC composites for structural nuclear reactor applications and has published 6 papers related to SiC.
pipit@ynu.ac.krPipit Fitriani et al., J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008