Carbide and carbonitride surface treatment method for refractory metals
Abstract
A carbide and carbonitride surface treatment method for refractory metals is provided, in steps including, heating a part formed of boron, chromium, hafnium, molybdenum, niobium, tantalum, titanium, tungsten or zirconium, or alloys thereof, in an evacuated chamber and then introducing reaction gases including nitrogen and hydrogen, either in elemental or water vapor form, which react with a source of elemental carbon to form carbon-containing gaseous reactants which then react with the metal part to form the desired surface layer. Apparatus for practicing the method is also provided, in the form of a carbide and carbonitride surface treatment system (10) including a reaction chamber (14), a source of elemental carbon (17), a heating subassembly (20) and a source of reaction gases (23). Alternative methods of providing the elemental carbon (17) and the reaction gases (23) are provided, as well as methods of supporting the metal part (12), evacuating the chamber (14) with a vacuum subassembly (18) and heating all of the components to the desired temperature.
- Inventors:
-
- Danville, CA
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 870710
- Patent Number(s):
- 5580397
- Assignee:
- United States of America as represented by Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C23 - COATING METALLIC MATERIAL C23C - COATING METALLIC MATERIAL
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- carbide; carbonitride; surface; treatment; method; refractory; metals; provided; steps; including; heating; formed; boron; chromium; hafnium; molybdenum; niobium; tantalum; titanium; tungsten; zirconium; alloys; evacuated; chamber; introducing; reaction; gases; nitrogen; hydrogen; elemental; water; vapor; form; react; source; carbon; carbon-containing; gaseous; reactants; metal; desired; layer; apparatus; practicing; 10; 14; 17; subassembly; 20; 23; alternative; methods; providing; supporting; 12; evacuating; vacuum; 18; components; temperature; treatment method; reaction gases; reaction gas; gaseous reactants; gaseous reactant; refractory metal; water vapor; reaction chamber; surface layer; containing gas; form carbon; evacuated chamber; surface treatment; desired temperature; carbonitride surface; alternative methods; alternative method; refractory metals; desired surface; vapor form; containing gaseous; /148/
Citation Formats
Meyer, Glenn A, and Schildbach, Marcus A. Carbide and carbonitride surface treatment method for refractory metals. United States: N. p., 1996.
Web.
Meyer, Glenn A, & Schildbach, Marcus A. Carbide and carbonitride surface treatment method for refractory metals. United States.
Meyer, Glenn A, and Schildbach, Marcus A. Mon .
"Carbide and carbonitride surface treatment method for refractory metals". United States. https://www.osti.gov/servlets/purl/870710.
@article{osti_870710,
title = {Carbide and carbonitride surface treatment method for refractory metals},
author = {Meyer, Glenn A and Schildbach, Marcus A},
abstractNote = {A carbide and carbonitride surface treatment method for refractory metals is provided, in steps including, heating a part formed of boron, chromium, hafnium, molybdenum, niobium, tantalum, titanium, tungsten or zirconium, or alloys thereof, in an evacuated chamber and then introducing reaction gases including nitrogen and hydrogen, either in elemental or water vapor form, which react with a source of elemental carbon to form carbon-containing gaseous reactants which then react with the metal part to form the desired surface layer. Apparatus for practicing the method is also provided, in the form of a carbide and carbonitride surface treatment system (10) including a reaction chamber (14), a source of elemental carbon (17), a heating subassembly (20) and a source of reaction gases (23). Alternative methods of providing the elemental carbon (17) and the reaction gases (23) are provided, as well as methods of supporting the metal part (12), evacuating the chamber (14) with a vacuum subassembly (18) and heating all of the components to the desired temperature.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}
Works referenced in this record:
The kinetics and mechanisms of the absorption of carbon by niobium and tantalum in a methane or acetylene stream
journal, March 1974
- Hörz, G.; Lindenmaier, K.
- Journal of the Less Common Metals, Vol. 35, Issue 1