ISSN:
1551-2916
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
A novel reaction of TiCl4 and NaNH2 at 450°–500°C for 12–24 h was performed for the preparation of TiN nanocrystalline powders. Powder XRD patterns indicated that the as-synthesized powder was cubic-phase TiN with a lattice constant a=4.225 Å. Transmission electron microscopy images showed that the TiN powders consisted of uniform particles with an average diameter of 10–20 nm. The binding energies of Ti2p3/2 and N1s core levels at the position of 455.50 and 396.96 eV, respectively, were detected by X-ray photoelectron spectra. Four peaks, related to transverse acoustic, longitudinal acoustic, second-order acoustic, and transverse optical (TO) modes of TiN, respectively, were observed in the Raman spectra of TiN particles. A very reasonable formation mechanism of TiN nanocrystalline powders was proposed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1551-2916.2004.00050.x
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