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Title: 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:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
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)

Influence of a CVD carbon coating on the mechanical property stability of Nicalon SiC fiber journal January 1990
Unusual properties of microwave-sintered yttria-2wt% zirconia journal August 1988
Enhanced Thermal Shock Properties of Y 2 O 3 -2 WT.% ZrO 2 Heated Using 2.45 Ghz Radiation journal January 1988
Fibre-reinforced ceramics journal April 1987
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
Silicon Nitridation book January 1983
Gelcasting of Alumina journal March 1991
Strength of Nicalon Silicon Carbide Fibers Exposed to High-Temperature Gaseous Environments journal March 1991

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refractory
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metalloid
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consolidated
article
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nitrogen
containing
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temperature
sufficient
react
applying
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convert
nitride
addition
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oxide
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metal articles
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refractory metal
time sufficient
microwave energy
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refractory nitride
consolidated metal
/148/219/427/