Carbothermal synthesis of titanium nitride

White, G. V.; MacKenzie, Kenneth J.D.; Brown, I. W. M.; Bowden, M. E.; Johnston, James H.

doi:10.1007/bf00541555

Cited by 61 publications

(41 citation statements)

References 10 publications

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“…[34b) , 36,38,39] However, in the case of silicon, Si 3 N 4 formation can result from the reaction of N 2 with low oxides (compounds with low oxide content) formed as intermediates during the carbothermal reduction, since it is well established that Si 3 N 4 cannot be obtained by reaction of nitrogen with the polymer or with SiC in this temperature domain. The identification was carried out by XRD; Figure 5 shows an example for the b-SiC and hexogonal HfN ceramic.…”

Section: Preparation Of Mixed Sic ± Metal Nitridesmentioning

confidence: 99%

“…[36,38] When the transformation is performed under argon, the excess of carbon reacts with these intermediates, leading to metal carbide. In contrast, under a nitrogen atmosphere the reaction with the metal (or in some cases with low oxides) is faster since 1) the gas/solid contact is more efficient than the solid/ solid contact and 2) the products are thermodynamically more stable.…”

Section: Preparation Of Mixed Sic ± Metal Nitridesmentioning

confidence: 99%

“…(4)]. [38] We performed the ceramization under a flow of nitrogen and observed the formation of residues corresponding to mixed ceramics of SiC and metal nitrides [34±39] (Table 2). Interestingly, materials are obtained with ceramic yields quite close to the expected values.…”

Section: Preparation Of Mixed Sic ± Metal Nitridesmentioning

confidence: 99%

See 2 more Smart Citations

Ceramics and Nanostructures from Molecular Precursors

Corriu

2000

Angew. Chem. Int. Ed.

334

198

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The elaboration of solids from the molecular scale by a kinetically controlled methodology is one of the main challenges of molecular chemistry. In the long term, this should permit the design of solids with desired properties. Here, some examples are given which show a few methods that have been used for the preparation of solids from molecular precursors. The one-pot synthesis of rheologically controlled SiC is described. Access to a new kind of ceramic is obtained by the same methodology using molecular precursors. Mixed ceramics with interpenetrating networks are not accessible by the chemical thermodynamic route. The chemistry of hybrid materials obtained from molecular precursors through inorganic polymerization is presented. This class of materials offers wide perspectives because of 1) the large possibilities opened by the organic unit, 2) the kinetic control, which permits any kind of texture for the solid, and 3) the aptitude of these solids to become nanostructured.

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Section: Preparation Of Mixed Sic ± Metal Nitridesmentioning

confidence: 99%

Section: Preparation Of Mixed Sic ± Metal Nitridesmentioning

confidence: 99%

See 1 more Smart Citation

Ceramics and Nanostructures from Molecular Precursors

Corriu

2000

Angew. Chem. Int. Ed.

334

198

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“…Details of the model are reported elsewhere. 1 Diverse opinions can be found in the literature about the final stages of the reactions 1,2,5,7,8,18 because of the lack of standardized experimental conditions. The stream of nitrogen gas and the constant removal of CO, for example, prevent a real achievement of thermodynamic equilibrium and create an 'open system'.…”

Section: Ctc Of Tiomentioning

confidence: 99%

“…2,3,5,[7][8][9][10]12,13 Starting from blends of nanosize commercial TiN or TiO 2 powders mixed with different carbon powders (two carbon blacks, one active carbon), this study aimed to set up a low-cost route to synthesize pure and as fine as possible TiC 1 ÀX N X powders with an X value close to 0.5. The relationships among raw powders, processing conditions and characteristics of the products are reported and discussed.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ultrafine titanium carbonitride powders

Monteverde

Medri

Bellosi

2001

Applied Organom Chemis

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Titanium-carbonitride-based materials are very hard materials with increasing technical importance. They are mainly used in composites with various metal carbides and/or metallic binders (cermets) for metal cutting operations. These applications call for the synthesis of titanium carbonitride powders with homogeneous chemical composition, as small as possible grain size and narrower grain size distribution. Nowadays on the market, only commercial submicrometric (0.5-2 mm) powders are available. Starting from blends of nanosize commercial TiN or TiO 2 powders mixed with different carbon powders (carbon black, active carbon), this study aimed to set up a low-cost process to synthesize fine and pure TiC 1ÀX N X powders with an X value close to 0.5. The morphology of the as-obtained powders and the progress of the reaction were investigated by scanning electron microscopy and X-ray diffraction. The stoichiometric parameter X was estimated on the basis of a TiC 1ÀX N X Raoultian solid solution together with Vegard's rule. The results are presented and discussed to assess relations between powder characteristics and processing conditions. The most encouraging results were obtained using a mixture TiN 10 wt%C (carbon black) processed at 1430°C for 3 h under flowing argon. Regularly shaped particles with limited agglomeration ranged from 100 to 300 nm and an X value close to 0.5

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Keramiken und nanostrukturierte Materialien aus molekularen Vorstufen

Corriu

2000

Angewandte Chemie

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Carbothermal synthesis of titanium nitride

Cited by 61 publications

References 10 publications

Ceramics and Nanostructures from Molecular Precursors

Ceramics and Nanostructures from Molecular Precursors

Synthesis of ultrafine titanium carbonitride powders

Keramiken und nanostrukturierte Materialien aus molekularen Vorstufen

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