Densieication of nonstoichiometric titanium carbide during sintering

Ordan’yan, S. S.; Tabatadze, G.; Kozlovskii, L. V.

doi:10.1007/bf00797248

Cited by 7 publications

(2 citation statements)

References 1 publication

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“…Consequently, for non-stoichiometric phases the contribution of cooperative dislocation mechanisms becomes significant only if D ef becomes much higher than that for stoichiometric carbides. Consequently, both at low and high sintering temperatures (D ef being the same) the processes associated with the motion of dislocations in MeC x phases are inhibited with increasing degree of defectiveness of the carbon sublattice [22].…”

Section: Isothermal Sintering Of Inorganicmentioning

confidence: 98%

Isothermal sintering of inorganic powders

Kravchik

Ordan’yan

2005

Refract Ind Ceram

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Results of a study of the isothermal sintering of specimens press-molded from powders of Ni, W, W + 0.5% Ni, zirconium, and niobium carbides of different dispersity and composition are reported. Rate parameters of the sintering process are calculated using the Ivensen phenomenological model. The activity of sintering is shown to be controlled not by the total amount of free energy stored in the powdered material, but rather dependent on the nanocrystalline structure of particles and processes that occur on the particle surface during sintering.

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Section: Isothermal Sintering Of Inorganicmentioning

confidence: 98%

Isothermal sintering of inorganic powders

Kravchik

Ordan’yan

2005

Refract Ind Ceram

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“…Lattice parameters of the titanium carbide phase as a function of its composition[8,[37][38][39][40].…”

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confidence: 99%

Additive manufacturing of complex-shaped graded TiC/steel composites

et al. 2017

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Complex-shaped TiC x ceramic preforms with a gradient of carbon content in the titanium carbide phase (x changes from 0.7 to 0.98) were fabricated for the first time by Binder jet 3D printing technology. The complex-shaped preforms were infiltrated with molten carbon steel (0.7 wt.%C). Thermodynamic considerations showed that carbon could be transferred from titanium carbide to steel and vice versa according to the initial concentration of carbon (activity) in both phases. After infiltration, solidification and slow cooling, a microstructural gradient was obtained throughout the steel matrix from ferrite, in the region where the steel was in contact with titanium carbide of low carbon content (x=0.7), to pearlite, in the region where the steel underwent interactions with stoichiometric titanium carbide (x=0.98). After annealing at 900°C and quenching in oil, a structural gradient in the steel matrix from ferrite to martensite was obtained, resulting in a hardness gradient of 700-1600 HV. The suggested processing approach allows for fabrication of complex-shaped graded composites with the desired property gradient suitable for a wide range of practical applications.

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