The effects of pyrolytic carbon interphase thickness on the properties of hot-pressed SiCf/SiC composites

Title
The effects of pyrolytic carbon interphase thickness on the properties of hot-pressed SiCf/SiC composites
Author(s)
윤당혁노비얀토알피안
Keywords
SIC/SIC COMPOSITES; CARBIDE COMPOSITES; THERMAL-PROPERTIES; MICROSTRUCTURE; Y2O3-AL2O3; STABILITY; SILICON
Issue Date
201208
Publisher
KOREAN ASSOC CRYSTAL GROWTH, INC
Citation
JOURNAL OF CERAMIC PROCESSING RESEARCH, v.13, no.4, pp.392 - 397
Abstract
The effects of pyrolytic carbon interphase (PyC) thickness on the density, microstructure, and mechanical properties of continuous SiC fiber-reinforced SiC composites (SiCf/SiC) have been examined. Electrophoretic deposition combined with ultrasonication was performed to infiltrate a SiC-based matrix phase effectively into the fine voids of a Tyranno-SA SiC fabric preform, which was coated with PyC at thicknesses of 0, 200, 400, 600, and 800 nm. The density of the hot-pressed SiCf/SiC composites decreased with increasing PyC thickness because of the difficulty of matrix-phase infiltration into the fine voids of the preform. SiCf/SiC composites with PyC <= 400 nm showed a brittle fracture mode due to the strong fiber-matrix interface, in spite of their relatively high flexural strength. On the other hand, toughened SiCf/SiC composites could be achieved with PyC >= 600 nm because of the formation of a weak interface, in spite of their decreased flexural strength.
URI
http://hdl.handle.net/YU.REPOSITORY/27553
ISSN
1229-9162
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공과대학 > 신소재공학부 > Articles
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