Synthesis of transition metal carbonitrides

Patent · Sat Jan 01 00:00:00 EST 1994

OSTI ID:869315

Munir, Zuhair A. R. ^[1]; Eslamloo-Grami, Maryam ^[1]

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1. Davis, CA

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: Univ. of California (United States)
• 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

Related Subjects

synthesis
transition
metal
carbonitrides
particular
titanium
carbonitride
tic
synthesized
self-propagating
reaction
carbon
nitrogen
atmosphere
complete
conversion
phase
achieved
addition
diluent
pressure
gtoreq
mpa
thermodynamic
phase-stability
calculations
experimental
characterizations
quenched
samples
provided
revealed
mechanism
formation
two-step
process
step
involves
nonstoichiometric
carbide
followed
product
incorporation
defect-structure
transition metal
nitrogen atmosphere
two-step process
samples provided
step process
complete conversion
propagating reaction
metal carbonitrides
metal carbon
titanium carbonitride
metal carbonitride
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