Synthesis of nanoscale titanium nitride–tungsten nitride alloy powders using a novel complexed precursor
| Autor: | Jin Yong Kim, K.S. Weil, Prashant N. Kumta |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry Alloy chemistry.chemical_element Nitride engineering.material Tungsten Condensed Matter Physics Titanium nitride Nanocrystalline material chemistry.chemical_compound chemistry Mechanics of Materials engineering General Materials Science Acetonitrile Tungsten nitride Titanium |
| Zdroj: | Materials Letters. 39:292-297 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/s0167-577x(99)00023-3 |
| Popis: | Nanocrystalline titanium–tungsten nitride alloy powders containing 50 at.% each of titanium and tungsten were synthesized by a novel mixed-metal chloride complexation technique. Chloride salts of the two metal species were simultaneously dissolved in a common solvent such as acetonitrile, then reacted with triethylamine to form a semi-viscous, air stable solution which separated out from the acetonitrile phase. Evaporation of the solvent yielded a solid waxy precursor. When the precursor was heat treated in ammonia, a single phase nitride alloy formed. The main advantage of the present technique is in obtaining a molecularly mixed polynuclear complex which can be quickly converted, due to small diffusion distances, to the corresponding homogeneous nitride alloy. By controlling the ammonolysis conditions during the heating of the precursor, fine-scale powders can be prepared. As measured by X-ray diffraction peak broadening calculations and observed by transmission electron microscopy, the powder particles of this particular alloy nitride system are nanocrystalline in size. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect