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RESEARCH PRODUCT
Microstructural study of titanium carbonitride elaborated by combustion synthesis
Dominique VrelNicole FrétyS. ParisR.m. Marin-ayralD. CaroleFrédéric Bernardsubject
Reaction mechanismMaterials scienceSelf-propagating high-temperature synthesischemistry.chemical_elementMineralogy02 engineering and technologyCombustion01 natural sciences7. Clean energychemistry.chemical_compoundPhase (matter)0103 physical sciencesMaterials ChemistryComputingMilieux_MISCELLANEOUS010302 applied physicsProcess Chemistry and Technology[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyMicrostructureTitanium nitrideSurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialschemistryChemical engineering[ CHIM.MATE ] Chemical Sciences/Material chemistryX-ray crystallographyCeramics and Composites0210 nano-technologyCarbondescription
Abstract The self-propagating high-temperature synthesis (S.H.S.) process, which is promising for the fabrication of ceramic materials, was chosen to elaborate titanium carbonitride materials. The influence of parameters such as nitrogen gas pressure and carbon ratio on the microstructure was studied. A single phase product of Ti(C,N) is obtained for a carbon ratio under 15 at.% and a nitrogen pressure of 36 MPa. The increase of the carbon ratio corresponds to a decrease of the maximum temperature reached during the synthesis. Time resolved X-ray diffraction measurements (TRXRD) with the synchrotron radiation were used to determine the reaction mechanisms. We could observe that the synthesis of Ti(C,N) is preceded by the formation of titanium nitride. This reaction is initiated by the allotropic transition of α-Ti phase into β-Ti. In the final material the presence of sub-stoichiometric phases such as Ti 2 N and α-Ti was observed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-12-01 |