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Effect of Various Additives and Method of Sintering on the Silicon Nitride Phase Transformation
O.A. Lukianova;V.V. Krasil'nikov;R.E. Bogachev;A.A. Parkhomenko;A.I. Kartamyshev
2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
The main tendencies of the influence of the most popular oxide additives on β-silicon nitride content of such methods as sintering without pressure and spark plasma sintering were considered. The maximum amount of β- silicon nitride was found in the short time pressureless sintered material with magnesium and aluminum oxide. With an increase in the spark plasma sintering temperature from 1550° C t...Show More
Influence of Al2O3-MgO on the Young's Modulus and Microhardness of SPSed Silicon Nitride
O.A. Lukianova;V.V. Krasil'nikov;A.N. Khmara;A.I. Kartamyshev;A.A. Parkhomenko
2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2018 | Conference Paper |
It was shown that described spark plasma sintered Al2O3-MgO doped silicon nitride has high mechanical properties in particular the microhardness and the Young's modulus. An increase in the temperature of SPS from 1550 °C up to 1650 °C led to an insignificant densification of the reported silicon nitride and decrease in microhardness. Proposed combination appears promising in terms of allowing sint...Show More
Electrical Resistivity of Pressureless Sintered Silicon Nitride with A12O3-Y2O3
V.V. Krasil'nikov;O.A. Lukianova;A.N. Khmara;A.A. Parkhomenko
2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2018 | Conference Paper |
Cited by: Papers (1)
In this article we have shown that the material obtained by sintering without pressure with addition of oxides of yttrium and aluminum has excellent electrophysical properties. In particular, the electrical resistivity of pressureless sintered at 1650° C silicon nitride with Al2O3-Y2O3was equal to 3.6-109. The mechanisms of conductivity of the described material were discussed and described. The h...Show More
Thermophysical properties of pressureless sintered silicon nitride
O.A. Lukianova;A.N. Khmara;V.V. Krasil'nikov;A.A. Parkhomenko;S.E. Savotchenko
2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2017 | Conference Paper |
This paper describes an analytical investigation of radio engineering characteristics of the silicon nitride ceramics. The temperature dependences of the dielectric permittivity and the dielectric loss tangent are determined in an explicit analytical form. It is shown that the obtained dependences adequately describe the experimental data. High-temperature dependences of the thermal conductivity a...Show More
Finite element model of mechanical tests of pressureless sintered silicon nitride
O.A. Lukianova;V.V. Krasil'nikov;A.N. Khmara;A.A. Parkhomenko
2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2017 | Conference Paper |
Investigation of the stress distribution in the disk sample by finite element method was carried out. A close coincidence of the experimental data with the presented model was found. Pleminary results are reported in this paper. Such physical properties as surface porosity and density are also discussed. It is shown that produced ceramics destroyed uniformly after uniaxial compression tests.Show More
Effect of the various oxide additives on the microhardness of silicon nitride ceramics
A.A. Parkhomenko;O.A. Lukianova;A.N. Khmara;V.V. Krasil'nikov
2017 IEEE 7th International Conference Nanomaterials: Application & Properties (NAP)
Year: 2017 | Conference Paper |
Cited by: Papers (2)
This article describes the effects of aluminum, yttrium and magnesium oxides on the microhardness of silicon nitride ceramics. Such methods as spark plasma sintering and standard sintering in a nitrogen atmosphere for a short time were chosen. The temperature range near the phase transformation of silicon nitride for spark plasma sintering was investigated as the most relevant. It was shown that c...Show More
Mechanical properties and microstructure of silicon nitride fabricated by pressureless sintering
O. A. Lukianova;V. V. Sirota;V. V. Krasil'nikov;A. A. Parkhomenko
2016 International Conference on Nanomaterials: Application & Properties (NAP)
Year: 2016 | Conference Paper |
Cited by: Papers (8)
The microstructure and mechanical properties of sintered silicon nitride ceramics were described. Fracture toughness, microhardness and bending strength were measured. The work is aimed to show that obtained material has moderately high strength, high physical properties and duplex microstructure.Show More
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