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Method of nitriding refractory metal articles

Patent ·
OSTI ID:869189
 [1];  [2];  [3];  [4];  [5]
  1. Lenoir City, TN
  2. Knoxville, TN
  3. Oak Ridge, TN
  4. Lagos, NG
  5. Flushing, NY
+ Show Author Affiliations

A method of nitriding a refractory-nitride forming metal or metalloid articles and composite articles. A consolidated metal or metalloid article or composite is placed inside a microwave oven and nitrogen containing gas is introduced into the microwave oven. The metal or metalloid article or composite is heated to a temperature sufficient to react the metal or metalloid with the nitrogen by applying a microwave energy within the microwave oven. The metal or metalloid article or composite is maintained at that temperature for a period of time sufficient to convert the article of metal or metalloid or composite to an article or composite of refractory nitride. In addition, a method of applying a coating, such as a coating of an oxide, a carbide, or a carbo-nitride, to an article of metal or metalloid by microwave heating.

Research Organization:
LOCKHEED MARTIN ENRGY SYST INC
DOE Contract Number:
AC05-84OR21400
Assignee:
Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
Patent Number(s):
US 5294264
OSTI ID:
869189
Country of Publication:
United States
Language:
English

References (8)

Fibre-reinforced ceramics journal April 1987
Unusual properties of microwave-sintered yttria-2wt% zirconia journal August 1988
Silicon Nitridation book January 1983
Gelcasting of Alumina journal March 1991
Enhanced Thermal Shock Properties of Y 2 O 3 -2 WT.% ZrO 2 Heated Using 2.45 Ghz Radiation journal January 1988
Influence of a CVD carbon coating on the mechanical property stability of Nicalon SiC fiber journal January 1990
Strength of Nicalon Silicon Carbide Fibers Exposed to High-Temperature Gaseous Environments journal March 1991
Thermal Degradation of Nicalon™ SiC Fibers
  • Clark, Terence J.; Arons, Richard M.; Stamatoff, James B.
  • Proceedings of the 9th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 6, Issue 7/8 https://doi.org/10.1002/9780470320280.ch10
book January 1985

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Related Subjects

/148/219/427/
addition
applying
article
articles
carbide
carbo-nitride
coating
composite
composite article
composite articles
consolidated
consolidated metal
containing
containing gas
convert
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forming
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gas
heated
heating
inside
introduced
maintained
metal
metal article
metal articles
metalloid
metalloid article
method
microwave
microwave energy
microwave heating
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nitride
nitriding
nitrogen
nitrogen containing
oven
oxide
period
placed
placed inside
react
refractory
refractory metal
refractory nitride
refractory-nitride
sufficient
temperature
temperature sufficient
time
time sufficient
wave energy