Characteristics of SiCf/SiC hybrid composites fabricated by hot pressing and spark plasma sintering

Title
Characteristics of SiCf/SiC hybrid composites fabricated by hot pressing and spark plasma sintering
Author(s)
노비얀토 알피안[노비얀토 알피안]한영환윤당혁
Keywords
SIC/SIC COMPOSITES; MECHANICAL-PROPERTIES; CARBIDE COMPOSITES; THERMAL-PROPERTIES; MATRIX COMPOSITES; SILICON-CARBIDE; FIBER; DENSIFICATION; CERAMICS; MICROSTRUCTURE
Issue Date
201110
Publisher
MANEY PUBLISHING
Citation
ADVANCES IN APPLIED CERAMICS, v.110, no.7, pp.375 - 381
Abstract
SiC fibre reinforced SiC-matrix ceramic composites were fabricated by electrophoretic deposition (EPD) combined with ultrasonication. Fine beta-SiC powder and Tyranno-SA fabrics were used as the matrix and fibre for reinforcement, respectively. Different amounts of fine Al2O3-Y2O3 were added for liquid phase assisted sintering. For EPD, highly dispersed slurry was prepared by adjusting the zeta potentials of the constituent particles to >=+40 mV for homogeneous deposition. The composite properties were compared after using two different consolidation methods: hot pressing for 2 h at 20 MPa and spark plasma sintering (SPS) for 3 min at 45 MPa at 1750 degrees C to minimise the damage to the SiC fibre. The maximum flexural strength and density for the 45 vol.-% fibre content composites were 482 MPa and 98% after hot pressing, respectively, whereas those for SPS were 561 MPa and 99.5%, indicating the effectiveness of SPS.
URI
http://hdl.handle.net/YU.REPOSITORY/24444http://dx.doi.org/10.1179/1743676111Y.0000000025
ISSN
1743-6753
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공과대학 > 신소재공학부 > Articles
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