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Title: Synthesis of transition metal carbonitrides

Abstract

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.

Inventors:
 [1];  [1]
  1. Davis, CA
Issue Date:
Research Org.:
Univ. of California (United States)
OSTI Identifier:
869315
Patent Number(s):
5314656
Assignee:
Regents of University of California (Oakland, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
DOE Contract Number:  
FG03-86ER45249
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
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; /419/75/

Citation Formats

Munir, Zuhair A. R., and Eslamloo-Grami, Maryam. Synthesis of transition metal carbonitrides. United States: N. p., 1994. Web.
Munir, Zuhair A. R., & Eslamloo-Grami, Maryam. Synthesis of transition metal carbonitrides. United States.
Munir, Zuhair A. R., and Eslamloo-Grami, Maryam. Sat . "Synthesis of transition metal carbonitrides". United States. https://www.osti.gov/servlets/purl/869315.
@article{osti_869315,
title = {Synthesis of transition metal carbonitrides},
author = {Munir, Zuhair A. R. and Eslamloo-Grami, Maryam},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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