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Volume 6 Research & Reviews: Journal of Material Sciences MatSciEngg 2018
October 15-17, 2018
October 15-17, 2018 Helsinki, Finland
31st Materials Science and Engineering
Conference: Advancement & Innovations
Development of high strength- high porosity Si3N4 bodies via a modified gel-casting process
Amir Parsi, Farhad Golestanifard*, Seyyed Mohammed Mirkazemi
Iran University of Science and Technology, Iran
Porous Si3N4 bodies are of interest in various applications including bio and aerospace.
Silicon nitride bodies were prepared with porosity and flexural strength of about 38%
and near 180 MPa, respectively. The processing was via gel-casting method employing
acrylamide (AM) and N,N'−methylene bisacrylamide (MBAM) for primary slurry,
followed by coke bed sintering. The concentrations of APS and TEMED as initiator and
catalyst, the sintering time and temperature were studied and optimized. Phase evolution
and microstructure observation, as well as flexural strength and porosity of porous Si3N4
bodies, were investigated. It was found above, sintering process at 1650 °C with prolonged
time had a significant effect on strength in a way that bodies with 33% porosity could
experience of 250 MPa. Development of interlocking microstructure of fine β-Si3N4
grains was found to be the key factor for increase of strength. Controlling the primary slurry components was also vital for
maintaining the high strength. The results were explained with emphasis on potential applications.
Biography
Amir Parsi received the degree in Materials Science and Engineering from Sharif University of Technology (SUT), Tehran, Iran, in 2012, and the .
degree in Ceramic Engineering from Iran University of Science and Technology (IUST), Tehran, Iran, in 2015. Since then, he has been working under supervision
of Prof. Golestanifard in the Refractory and Ceramic Synthesis Lab in the IUST. He is not carrying on research on synthesis ceramic powders but also being the lab
manager. He has won the Best Poster Award from 10th Congress of the Iranian Ceramic Society (ICerS) & First International Conference on Advanced Ceramics
for a paper entitled "Rheological Properties of Silicon Nitride Slurries for Gelcasting". In recent years, he has focused on preparing porous Silicon Nitride ceramic
bodies with high strength with the intention of utilizing in bio applications.
Amir Parsi et al., Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C5-026