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Synthesis of transition metal carbonitrides

Patent ·
OSTI ID:869315
 [1];  [1]
  1. Davis, CA
+ Show Author Affiliations
Transition metal carbonitrides (in particular, titanium carbonitride, TiC.sub.0.5 N.sub.0.5) are synthesized by a self-propagating reaction between the metal (e.g., titanium) and carbon in a nitrogen atmosphere. Complete conversion to the carbonitride phase is achieved with the addition of TiN as diluent and with a nitrogen pressure .gtoreq.0.6 MPa. Thermodynamic phase-stability calculations and experimental characterizations of quenched samples provided revealed that the mechanism of formation of the carbonitride is a two-step process. The first step involves the formation of the nonstoichiometric carbide, TiC.sub.0.5, and is followed by the formation of the product by the incorporation of nitrogen in the defect-structure carbide.
Research Organization:
University of California
DOE Contract Number:
FG03-86ER45249
Assignee:
Regents of University of California (Oakland, CA)
Patent Number(s):
US 5314656
OSTI ID:
869315
Country of Publication:
United States
Language:
English

References (7)

The mechanism of synthesis of titanium nitride by self-sustaining reactions journal October 1990
Effect of Porosity on the Combustion Synthesis of Titanium Nitride journal May 1990
Ignition of titanium in nitrogen journal January 1976
Titanium-carbon interaction mechanism in a combustion wave journal January 1982
Combustion synthesis of titanium carbide: Theory and experiment journal January 1986
Effect of Nitrogen Pressure and Diluent Content on the Combustion Synthesis of Titanium Nitride journal August 1990
High-Pressure Self-Combustion Sintering of Titanium Carbide journal September 1987

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