Electrochemical synthesis of ceramic materials. 4. Electrophoretic deposition of metal-nitride ceramic precursors. Technical report, 1 June 1995-31 May 1996
Technical Report
·
OSTI ID:381611
We have prepared metal-nitride, ceramic precursors by anodic dissolution of the corresponding metal in liquid NH3 electrolyte solutions, and then deposited coatings of these precursors onto n-Si substrates by electrophoresis. X-ray diffraction and electron microscopy indicate that calcination of the precursor-coated substrates yields coatings of AlN, delta-NbN, and Ni3N. Precursor coatings are formed by applying fields greater than 10 V/cm between electrodes in a CH3CN suspension of the precursor. The positively charged precursor particles deposit selectively on the cathode. Subsequent calcination in flowing NH3 or Ar yields the metal-nitride coating. The Ni3N coating was prepared by calcining the precursor at 375 C in NH3, while the AlN and NbN precursor coatings were prepared by calcination at 1100 C in NH3 and 800 C in Ar, respectively.
- Research Organization:
- Texas A and M Univ., College Station, TX (United States). Dept. of Chemistry
- OSTI ID:
- 381611
- Report Number(s):
- AD-A--310641/6/XAB; CNN: Contract N00014-93-1-1338
- Country of Publication:
- United States
- Language:
- English
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