Correlation between crystallite size and spectra using Ti-C system

Abstract

TiC crystallites less than 3 nm in size showed an absorption feature at 14.3 um. This 14.3 um absorption was hardly seen in specimens ranging from bulk material to grains 50 nm in size. The absorption feature at 14.3 um was weakened due to the growth of TiC crystallites by heat treatment. If the carbide grains were covered with a carbon layer, the absorption peaks were remarkably weakened, i.e., the absorption intensity depended on the grain surface.