| Abstract
| - To suppress the reactivity of nanoscaled non-oxidic powders of titanium nitride (TiN) and siliconcarbonitride (SiCN) against hydrolysis and oxidation, chemical surface modification with nitrogen-containingsurfactants was investigated. Among these surfactants, long-chain primary amines, ethylenediamines,guanidines, nitriles, isocyanates, and succinimides were examined. Thermogravimetry, elemental analysis,and behavior against the water-vapor adsorption of the modified particles were used as methods to estimatethe protective capacity of the organic coating material. The best results were obtained by using the long-chain amines and octadecylisocyanate, which were indicated by a significant shift of the powder oxidationtoward the higher temperatures and an increase of the particle hydrophobicity. A long-chain succinimidewas found to be the most effective in dispersing nanoscaled TiN in organic media. Preparation of a stableaqueous dispersion without significant changes in the elemental composition of the powder was achievedby the application of an ionic surfactant to the surface-modified particles.
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