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1. Thermal nitridation synthesis of MN (<F>M=Ti</F>, V and Cr) nanocrystals from metals and NH4Cl

Author

Yang, Xiaogang, Li, Cun, Yang, Baojun, Wang, Wei, and Qian, Yitai

Subjects
*METAL powders, *NANOSTRUCTURES, *LATTICE dynamics, *X-ray diffraction, *TRANSMISSION electron microscopy
Abstract

Nanocrystalline TiN, VN and CrN have been synthesized by a thermal nitridation reaction between the corresponding metal powder and NH4Cl at 600 °C in an autoclave. X-ray powders diffraction (XRD) indicated that these nanocystallites had a NaCl-type structure with lattice parameters: a=4.236 Å for TiN, 4.133 Å for VN, 4.145 Å for CrN. Transmission electron microscopy (TEM) showed these products consisted of cubic nanocrystals. X-ray photoelectron spectroscopy (XPS) and thermogravimetric analysis (TGA) techniques revealed that all the products were almost pure nitrides. [Copyright &y& Elsevier]

Published
2004
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