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  • 1
    Electronic Resource
    Electronic Resource
    Choice of a composition for a high-refractory concrete using calculations of the reduction reaction of the components (1986)
    Springer
    Refractories and industrial ceramics 27 (1986), S. 672-680 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions The calculation of the thermodynamic parameters showed that in the case of a finely dispersed binding part of the concretes working in conditions where alternating oxidizing and reducing gas media are in operation, the most promising materials are binders based on corundum and high-alumina cement. These data are in good agreement with the results of experimental studies of the carbon-resistance and erosion resistance of a series of refractories. It is also shown that the most effective filler of the concretes is corundum which has a high stability in relation to reducing media and a low vapor pressure a high temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387227
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  • 2
    Electronic Resource
    Electronic Resource
    A study of the properties of unfired corundum concretes using a mathematically planned experiment (1986)
    Springer
    Refractories and industrial ceramics 27 (1986), S. 523-530 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Using the method of simplex-grid experiment planning, we have studied the properties of a multicomponent finely dispersed fraction of specimens of corundum concrete over a wide range of composition. The optimal ratios between the components of the finely dispersed fraction of the mixture of corundum concretes have been established. It is shown that the concentration of high-alumina VGTs-70 cement lies between 13.6–14.4%; GK alumina, 12.56–13.2%; binding additive 1.64–2.6%; 1% of a high-refractory oxide additive in a finely dispersed fraction of corundum concrete ensures that high indices are obtained for the main service properties of unfired specimens: ultimate compressive strength 11–14 MPa; thermal-shock resistance 14–15 water-heat cycles from 1300°C; and changes of +0.4 to +0.5% in the linear dimensions after heating to 1750°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01387269
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  • 3
    Electronic Resource
    Electronic Resource
    Carbon resistance of corundum concretes (1988)
    Springer
    Refractories and industrial ceramics 29 (1988), S. 207-213 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions The resistance of the corundum concretes to carbon during direct interaction under the conditions of high temperature isothermal holding is quite high. After holding for a period of 120 h at 1580°C, the weight loss of the concrete specimens is insignificant (0.2–0.4%) without exception. Modifying the structure of the concretes using chromium oxide and a mixture of lignosulfonates makes it possible to reduce the weight loss in the carbon-bearing medium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01389560
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  • 4
    Electronic Resource
    Electronic Resource
    Structure evolution of corundum concretes (1989)
    Springer
    Refractories and industrial ceramics 30 (1989), S. 203-211 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Structure evolution of the corundum concretes based on the binders of different compositions was studied. We demonstrated the effect of Cr2O3, CCLS, and technological (technical-grade) lignosulfonate on the strength gain of the cement stone and the concrete based on it, the phase composition of the cement stone and the concrete, their variation during the process of heat treatment, and on the microstructure. The ability of these additives to increase the degree of hydration of the high-alumina cement was established. The formation of a large quantity of aluminum hydroxide and calcium hydromonocarboaluminate confirm this fact. The evolution of a dense and strong structure of the corundum concrete based on the high-alumina cement and the occurrence of additional growth during the high-temperature firing process due to the formation of CA6 and the solid solutions of corundum and CA6 with Cr2O3 were shown.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01326668
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  • 5
    Electronic Resource
    Electronic Resource
    Strength of corundum concretes (1986)
    Springer
    Refractories and industrial ceramics 27 (1986), S. 311-317 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions Studies were made of the strength properties of corundum concretes containing a hydraulic bond, and an assessment was made of bending strength in relation to the heat-treatment temperature. It is shown that the concretes investigated belong to nonlinearly deformable materials. We determined the true strength of the concretes, which with rise in temperature increases; the strongest are concretes with a bond from hydraulically setting cement — Talum cement. We determined the maximum bending deformation of the concretes. It is shown that the lower the elastic deformation shown by the refractory material before failure then the less catastrophically will the destruction occur. We determined the densities of the full energy of deformation and the elastic energy at temperatures of 120, 1400, and 1750°C. It was established that concretes characterized by maximum strength possess the greatest stock of densities of full and elastic energy. On the basis of the deformation diagrams obtained for nonlinear-elastic concretes we determined the magnitudes of static and dynamic elasticity moduli. The strongest concretes are characterized by the maximum modulus values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386675
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  • 6
    Electronic Resource
    Electronic Resource
    Critierional evaluation of thermal destruction of corundum concretes (1988)
    Springer
    Refractories and industrial ceramics 29 (1988), S. 265-273 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions The resistance of corundum concretes to thermal destruction was studied using the experimentally plotted deformation diagrams and the standard thermal cycling method. The correlation between the values of thermal shock resistance obtained according to these methods was established for the corundum concretes. It was established that as compared to the concrete produced using a binder based on the Talyum cement, the concretes incorporating a hydraulically hardening (water-setting) binder prepared from the VTs-70 grade high-alumina cement exhibit better resistance to thermal stresses. With increasing strength and density of the concretes, their thermal destruction occurs catastrophically (abruptly) since the elements of a stronger structure (the concretes produced using the Talyum cement-based binder) are incapable of effectively hindering the growth of a potential crack. Modification of the structure of the concrete by introducing Cr2O3 additive leads not only to an increased thermal shock resistance in the high-temperature range due to an increased critical crack length, but also to an increased resistance ot crack displacement (opening).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01293361
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  • 7
    Electronic Resource
    Electronic Resource
    Zirconia-base ceramics for drawing tools (1996)
    Springer
    Refractories and industrial ceramics 37 (1996), S. 156-162 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Results of an investigation and fabrication of a ceramic drawing tool based on zirconia partially stabilized by yttrium oxide and the combined stabilizing additives Y2O3 + CeO2 and Y2O3 + MgO, which increase the heat resistance of the materials, are presented. The developed ceramics based on ZrO2 and stabilized by 2% Y2O3 by chemical coprecipitation with a CeO2 additive has the following parameters: an open porosity of 2.1%, an apparent density of 5.60 g/cm3, an ultimate bending strength of 450 MPa. In a ceramic based on ZrO2 and stabilized by 5% Y2O3 by the method of ceramic sintering the corresponding parameters are 3%, 5.62 g/cm3, and 271 MPa. An experimental batch of zirconia drawing matrices has been produced and tested in tube drawing. Mandrel-free drawing of tubes made of stainless steel of grades 08Kh18N10, 12Kh18N10T, and ÉI702, copper of grade M1, and titanium alloy of grade VT1-0 and long-mandrel drawing of steel of grade 12Kh18N10T occurred stably and without sticking of the metal to the die or any damage to the tubes or dies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02307360
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  • 8
    Electronic Resource
    Electronic Resource
    Erosion resistance of corundum concretes (1991)
    Springer
    Refractories and industrial ceramics 32 (1991), S. 507-510 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01287539
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  • 9
    Electronic Resource
    Electronic Resource
    The condition of carbon blocks after service in a blast furnace (1976)
    Springer
    Refractories and industrial ceramics 17 (1976), S. 681-685 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01319864
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  • 10
    Electronic Resource
    Electronic Resource
    Wettability of aluminosilicate refractories with molten steel (1978)
    Springer
    Refractories and industrial ceramics 19 (1978), S. 254-257 
    Details
    ISSN: 1573-9139
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Conclusions An increase in the Al2O3 content of the base causes the wetting angle of steel 10kp to increase with an increase in the temperature from 1490 to 1620°C. Chromium-nickel steel wets refractories to a greater degree than rimmed steel. In this case the wetting angle is largest on mullite-corundum refractories containing 75–78% Al2O3. The introduction of small amounts of modifying additives in the form of MgO and Cr2O3+ ZrSiO4 into mullite-corundum and corundum refractories causes the wetting angle to increase by 7–10° and helps to increase the resistance of the refractory materials to the action of rimmed steel.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01280495
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