Corrosion-resistant ceramics and polymer composites based on the BaO-Al2O3-SiO2 system

Kovziridze, Z. D.; Aneli, D. N.; Nizharadze, N. S.; Tabatadze, G.; Gventsadze, D.

doi:10.1134/s1087659607030133

Cited by 2 publications

(2 citation statements)

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“…Technical progress is accompanied by the development and improvement of various fields, which in itself is related to the need to create multifunctional materials with new properties. Materials created on the basis of refractory carbides, borides, nitrides and silicides are distinguished by following operational properties: high fire resistance, high heat resistance, corrosion resistance to aggressive media, macro-and micromechanical, specific electrical and thermophysical properties and others [1] [2] [3] [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Study of Carbide-Sialon Composite in SiC-SiAlON-Al2O3 System

Kovziridze,

Nizharadze,

Tabatadze

et al. 2023

AMPC

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Goal: Synthesis of SiAlON by reaction coating method using aluminosilicate natural raw material geopolymer (kaolin), corundum and silicon carbide and on its basis obtaining a composite with high physical and technical properties by hot pressing for use in armor and rocket technology. For the intensification of SiAlON formation and sintering processes, the influence of various additives was studied, such as: aluminum powder, elemental silicon, yttrium and magnesium oxides. Method: A SiAlON-containing composite with an open porosity of 15% -16% was obtained by the metallothermic process and the method of reactive annealing in nitrogen. The resulting material was milled to a dispersion of 1 -3 µm and hot pressed at 1620˚C to obtain a product with high density and performance properties. We studied the process of SiAlON formation and the microstructure of the composite by X-ray phase, optical and electronmicroscopy analysis methods. Result: In the selected composition the β-SiAlON was formed at 1400˚C instead of 1800˚C, which was due to the mutual influence of the initial raw materials: geopolymer kaolin, perlite, corundum, aluminum, silicon, SiC, the development of the process is facilitated by the vitreous dopant perlite (96 glass phase). The use of perlite, which is eutectic with geopolymer at low temperatures, creates a good prerequisite for intensive diffusion processes with other components. Conclusion: A SiAlON-containing composite with high physical and technical properties was obtained in the SiC-SiAlON-Al 2 O 3 system by the method of reactive sintering and hot pressing, with the following properties: the strength limit in compression is 1940 MPa, and in bending it is 490 MPa. The process of making SiAlON has been studied using X-ray phase and electron microscopy analysis methods. The physical and technical properties of the obtained composite are studied by modern research methods.

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Section: Introductionmentioning

confidence: 99%

Preparation and Study of Carbide-Sialon Composite in SiC-SiAlON-Al2O3 System

Kovziridze,

Nizharadze,

Tabatadze

et al. 2023

AMPC

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“…Ceramic/polymer composites [1][2][3] have very broad application prospects in the mechanical engineering, 4,5 chemical engineering, 6,7 and aerospace fields 8,9 owing to their excellent properties such as superior mechanical 10 and thermal 11 characteristics, outstanding electrical insulation, 12 and excellent corrosion resistance. 13 The interfaces in composites and their properties play an important role in determining the performance of the composites.…”

Section: Introductionmentioning

confidence: 99%