Investigation of structure and properties of composite material Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;-SiC obtained by electroconsolidation process

Вовк, Р. В.; Prokopiv, N.M.; Chishkala, V. A.; Kislitsa, M. V.

doi:10.15407/fm25.01.043

Cited by 6 publications

(3 citation statements)

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“…Increase the heating rate from 150 to 600 °C/min increases the hardness and crack resistance by, respectively, 1.0 GPa and 1.5 MPa•m 1/2 . In this case, the maximum values for hardness and crack resistance of the examined material are by 0.3 and 0.4 units larger than those for its analog Bichromit-R [5].…”

Section: Results Of Studying the Process Of Hot Pressingmentioning

confidence: 69%

“…4 shows that this value for crack resistance in diagram 3 is matched with a value for a heating rate of 400 °C/min. That was probably the rate at which they heated the mixture at HP of the material Bichromit-R, which was not registered in [5].…”

Section: Results Of Studying the Process Of Hot Pressingmentioning

confidence: 99%

“…High (>1,600 °C) temperature and pressure (30-40 MPa) greatly increase energy intensity and reduce the environmental friendliness of a given technology. Attempts to use much more expensive and non-technological nano-powders from refractory compounds [1][2][3] based on the conventional production technology of cutting plates failed to enhance their quality though increased the cost [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing

Prokopiv

Kharchenko

Gevorkyan

et al. 2019

EEJET

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Section: Results Of Studying the Process Of Hot Pressingmentioning

confidence: 69%

Section: Results Of Studying the Process Of Hot Pressingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing

Prokopiv

Kharchenko

Gevorkyan

et al. 2019

EEJET

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Electrical and thermal conductivity of FeNi at low temperatures

Khadzhay

Vovk

Вовк

et al. 2020

Low Temperature Physics

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The electrical resistivity and thermal conductivity as functions of temperature, for an equiatomic Fe–Ni system are studied. The samples were obtained from nickel and iron powders by a 10 min electroconsolidation at a temperature of 1100 °C, pressure 35 MPa, and current ∼5 kA, and studied in the range of 4.2–300 K. It was found that the electrical and thermal conductivity of the electroconsolidated sample is significantly higher than that of samples with the same composition, obtained by melting. It was revealed that in the investigated range of 4.2–300 K, an electroconsolidated sample’s resistivity as a function of temperature is determined by electrons scattering by defects and phonons, and the scattering of electrons by phonons can be approximated with high accuracy by the Bloch–Grüneisen–Wilson formula.

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Electroosmotic pressure in the process of a biocompatible coating applying on the inner surfaces of nanostructured ceramics

2019

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

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The role of the effect of electroosmosis in the process of electrochemical deposition of a biocompatible coating on the inner surfaces of porous nanostructured ceramics, a material used to make endoprostheses and implants in medicine, is discussed. The biocompatibility of endoprostheses and implants with the human body is ensured by applying a special coating on the internal and external surfaces of the base material. The commonly acepted chemical compound used to form this coating is hydroxyapatite Ca10(PO4)6(OH)2. Multicomponent ceramic materials, from which the basis of endoprostheses and implants are made, are usually obtained by the traditional method of powder metallurgy - sintering, i.e., exposure of a mixture of powders at an elevated temperature under pressure. The material obtained in this way is a polycrystal. In addition, the structure of such a material contains a certain amount of voids in the form of individual pores or their associations (capillaries). The paper shows that the use of nano-structured ceramic materials with a characteristic average size of structural elements (grains, pores and their aggregations) of the order ≈(10–9–10–7)м as a material for the manufacture of implants may determine the greater efficiency of the process of electrochemical application of a biocompatible coating on them, since the resulting large electroosmotic pressure in the capillaries leads to a greater degree of filling of the porous system with electrolyte. The magnitude of the electroosmotic pressure can be increased by increasing the strength of the acting electric field or by decreasing the dielectric constant of the electrolyte ε when additional chemical additives are introduced into the electrolyte. The maximum degree of hollow channels (capillaries) filling with electrolyte, and, consequently, the efficiency of applying a biocompatible coating to the internal surfaces of ceramics using the electrochemical method, is achieved with the capillary system of the material being completely open.

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Investigation of structure and properties of composite material Al<sub>2</sub>O<sub>3</sub>-SiC obtained by electroconsolidation process

Cited by 6 publications

References 0 publications

Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing

Exploring the process to obtain a composite based on Cr2O3–AlN using a method of hot pressing

Electrical and thermal conductivity of FeNi at low temperatures

Electroosmotic pressure in the process of a biocompatible coating applying on the inner surfaces of nanostructured ceramics

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