Title of article
Manufacturing and Structural Evaluation of Polymer Derived SiOC/TiC and SiOC/TiC/Mullite Nanocomposites
Author/Authors
Paryab, Amirhosein Department of Materials Science and Engineering - Sharif University of Technology - Tehran, Iran , Godary, Toktam Department of Materials Science and Engineering - Sharif University of Technology - Tehran, Iran , Abdollahi, Sorosh School of Metallurgy and Materials Engineering - Iran University of Science and Technology - Tehran, Iran , Anousheh, Mohsen Department of Materials Science and Engineering - Islamic Azad University Science and Research branch - Tehran, Iran , Khachatourian, Adrine Malek Department of Materials Science and Engineering - Sharif University of Technology - Tehran, Iran
Pages
8
From page
1
To page
8
Abstract
Silicon oxycarbide (SiOC) materials derived from silicone attracted great attention for their superior
high-temperature behavior. In the present study, Si (Ti)OC and Si (Ti,Al)OC nanocomposites, in which alkoxide
precursors were used with the main silicone precursor, have been compared with SiOC material. Although in SiOC,
C was bonded with Si in a carbon-rich SiOC phase, X-ray diffraction (XRD) and Fourier transform infrared
spectroscopy (FTIR) showed that TiC was the preferred state for C atoms upon adding Ti into the system. This claim
was also substantiated by Raman spectroscopy, where adding Ti into the system lowered the intensity of the D band,
indicating the high affinity of C to form crystalline TiC. In the Si(Ti,Al)OC nanocomposites synthesized by adding
AlCl3 into the Si(Ti)OC system, mullite nanocrystals formed a superlattice structure with TiC. UV-vis spectra of the
nanocomposites showed Si (Ti,Al)OC with mullite-TiC superlattice had a larger bandgap compared with Si(Ti)OC
with only TiC nanocrystals.
Keywords
polymer-derived ceramics , TiC , mullite , SiOC nanocomposite
Journal title
Iranian Journal of Materials Science and Engineering
Serial Year
2021
Record number
2685712
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