Synthesis of transition metal carbonitrides

Title: Synthesis of transition metal carbonitrides

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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:

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

Davis, CA

Publication Date:: 1994-01-01

Research Org.:: Univ. of California (United States)

OSTI Identifier:: 869315

Patent Number(s):: US 5314656

Assignee:: Regents of University of California (Oakland, CA)

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. 
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                    Munir, Zuhair A. R., & Eslamloo-Grami, Maryam. Synthesis of transition metal carbonitrides.  United States.

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                    Munir, Zuhair A. R., and Eslamloo-Grami, Maryam. Sat .  
        "Synthesis of transition metal carbonitrides".  United States.  https://www.osti.gov/servlets/purl/869315.

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@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          = {},

  url          = {https://www.osti.gov/biblio/869315},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1994},

  month        = {1}

}

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