In Situ Formation of Nanoparticle Titanium Carbide/Nitride Shaped Ceramics from Meltable Precursor Composition

A new synthetic method has been developed for the in situ formation of TiC and TiN nanoparticles in a shaped solid from a meltable precursor composition. The reactants are titanium hydride (TiH2) and 1,2,4,5-tetrakis(phenylethynyl)benzene (TPEB), which interact above 600 °C to form TiC and TiN nanop...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2014-12, Vol.118 (51), p.30153-30161
Main Authors: Keller, Teddy M, Laskoski, Matthew, Saab, Andrew P, Qadri, Syed B, Kolel-Veetil, Manoj
Format: Article
Language:English
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Summary:A new synthetic method has been developed for the in situ formation of TiC and TiN nanoparticles in a shaped solid from a meltable precursor composition. The reactants are titanium hydride (TiH2) and 1,2,4,5-tetrakis(phenylethynyl)benzene (TPEB), which interact above 600 °C to form TiC and TiN nanoparticles in the presence of argon and nitrogen, respectively. When the compacted powdered precursor composition is heated above 200 °C, the acetylenic units of TPEB react forming a networked polymer with the TiH2 homogeneously dispersed in the confines of the thermoset. During the carbonization process of 1,2,4,5-tetrakis(phenylethynyl)benzene, the carbon atom migrate into the interstitial space of the Ti lattice, resulting in stoichiometric TiC being formed. The novel reaction yields shaped solids of nanoparticle ceramics.
ISSN:1932-7447
1932-7455
DOI:10.1021/jp5082388