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

被引：12

作者：

Keller, Teddy M. ^{[1
]}

Laskoski, Matthew ^{[1
]}

Saab, Andrew P. ^{[1
]}

Qadri, Syed B. ^{[2
]}

Kolel-Veetil, Manoj ^{[1
]}

机构：

[1] Naval Res Lab, Div Chem, Washington, DC 20375 USA

[2] Naval Res Lab, Div Mat Sci & Technol, Washington, DC 20375 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 51期

关键词：

CARBOTHERMAL REDUCTION; TIC POWDERS; CARBON; CARBIDE; GEL;

D O I：

10.1021/jp5082388

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 degrees 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 degrees 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.

引用

页码：30153 / 30161

页数：9

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