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  1. No Access

    Article

    Use of silicon carbide refractories in gas carburization furnaces

    M. S. Fraifel'd, N. I. Krasotkina, M. V. Chistyakova, G. D. Ershova… in Refractories (1979)

  2. No Access

    Article

    Trough of polycrystalline silicon carbide for electric soaking pits

    The results of laboratory investigations and tests under industrial conditions demonstrated that in principle it is possible to use MPC as material for trough sections for electrically heated soaking pits.

    M. S. Fraifeld, N. I. Krasotkina, V. M. Yam, G. G. Gnesin, Yu. P. Dyban… in Refractories (1975)

  3. No Access

    Article

    The grain size distribution of silicon carbide as a factor in the properties and structure of refractories

    The microstructure of silicon carbide products with added fine-ground silicon carbide contains an evenly distributed silicon carbide binder and predominantly fine pores, viz. of radii 7.6-0.5μ (about 70% on the t...

    N. I. Krasotkina, G. D. Ershova in Refractories (1973)

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    Article

    Porous structure of silicon carbide refractories

    The silicon carbide refractories studied here possess dissimilar structural characteristics, i.e., terms of their dominant pore size they can be arranged in the following descending order: recrystallized type ...

    N. I. Krasotkina, M. V. Chistyakova, K. K. Shkodin in Refractories (1973)

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    Article

    Vibroimpact molding of large silicon carbide shapes

    Vibroimpact compaction methods were used to prepare large complicated shapes which in terms of quality (density and variations in density) are better than those made by tam**.

    V. M. Yam, V. F. Stepanov, N. I. Krasotkina, R. M. Shumeiko, N. K. Evseenko… in Refractories (1970)

  6. No Access

    Article

    Lining fireboxes in a high-pressure steam boiler

    The service conditions of the lining in high-pressure steam boilers with gas turbine blowing are characterized by a heating temperature above 1500–1550°C on the working surface and repeated sharp changes in te...

    A. K. Karklit, N. I. Krasotkina, V. G. Pil'dish, S. V. Malinovskii in Refractories (1970)

  7. No Access

    Article

    Aluminophosphate-bonded silicon carbide ramming body

    A silicon carbide body with an aluminophosphate bond after heat processing has a high strength and high refractoriness under load at 2 kg/cm2.

    N. I. Krasotkina, V. V. Levchuk, N. I. Voronin in Refractories (1969)

  8. No Access

    Article

    Stability of silicon carbide to hydrofluoric, nitric, and sulfuric acids

    α-SiC is practically undecomposed by hydrofluoric acid and a mixture of hydrofluoric acid and sulfuric and nitric acids, regardless of grain size.

    N. I. Krasotkina, V. S. Yakovleva, N. I. Voronin, S. P. Shmitt-Fogelevich in Refractories (1968)

  9. No Access

    Article

    Phase composition of si liga-bonded silicon carbide products in relation to environment

    In an oxidizing atmosphere in silicon carbide gutters containing a silica bond the silicon carbide is oxidized with the formation of a glassy film in which cristobalite crystallizes; we also note the presence ...

    N. I. Krasotkina, E. V. Petrova, R. M. Shumeiko, N. I. Votonin in Refractories (1968)

  10. No Access

    Article

    Firing silicon carbide refractories in a nitrogen atmosphere

    During the firing of specimens of silicon carbide and silicon in a nitrogen atmosphere at 1200–1400°C, the silicon is converted almost completely to silicon nitride. The content of impurities of SiO2 and Si varie...

    N. I. Voronin, N. I. Krasotkina, M. S. Fraifel'd in Refractories (1967)

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    Article

    Silicon carbide refractories with a complex bond of Si2On, SiC, Si3N4

    The physical and chemical processes taking place during the firing of products obtained from silicon carbide and silicon largely depend on the gaseous medium.

    N. I. Voronin, N. I. Krasotkina, M. S. Fraifel'd in Refractories (1967)

  12. No Access

    Article

    Stability of silicon nitride heated in air and in carbon monoxide

    Silicon nitride oxidizes in air at 1100–1500°C mainly with the formation of silica. An addition of NaF contributes to oxidation of the silicon nitride to silicon oxynitride.

    N. I. Krasotkina in Refractories (1967)

  13. No Access

    Article

    Vibration compaction of silicon carbide bodies

    V. M. Yam, N. K. Evseenko, V. T. Oleinik, M. S. Fraifel'd, N. I. Krasotkina… in Refractories (1966)

  14. No Access

    Article

    The use of ceramic recuperators in soaking pit furnaces

    Mixtures of SiC and slag and clinker do not fuse at 1300°C.

    N. I. Krasotkina, N. I. Voronin, I. S. Barskaya in Refractories (1964)

  15. No Access

    Article

    The effect of the firing schedule and slag additions on the homogeneity of silicon carbide products bonded with silica

    With the addition of 5–10% scale and the same amount of silicon, the articles proved to be homogeneous without black cores.

    N. I. Krasotkina, N. I. Voronin in Refractories (1964)

  16. No Access

    Article

    Siliconized graphite products for protecting immersion thermocouples used to measure liquid steel temperatures

    Sheaths made of siliconized graphite by the VIO (All Union Institute of Refractories) technology with preheating up to 1300° C are suitable for repeated measurement of liquid-steel temperatures.

    N. I. Krasotkina, N. I. Voronin, V. V. Levchuk in Refractories (1964)

  17. No Access

    Article

    Refractory products and ramming bodies for high pressure burners of steam boilers

    Silicon carbide rammed bodies are suitable for lining the combustion zones of high-pressure cyclone burners of steam boilers. The life of the silicon carbide body depends on the heat resistance of the supporti...

    N. I. Voronin, N. I. Krasotkina, A. I. kulik, T. S. Karmanova, G. E. Levin… in Refractories (1963)

  18. No Access

    Article

    Phase composition of silicon-nitride-bonded carborundum refractories

    Using electron-microscopic study, we confirmed the presence ofα-Si3N4,Β-Si3N4 andΒ-SiC in specimens of a mixture of silicon carbide and silicon after they had been fired in a coke charge in an oil furnace.

    N. I. Voronin, N. I. Krasotkina in Refractories (1962)

  19. No Access

    Article

    State of production and ways of improving quality of carborundum refractories

    N. I. Voronin, N. I. Krasotkina in Refractories (1961)

  20. No Access

    Article

    Nitride-bonded carborundum refractories

    The investigation confirmed the possibility of obtaining nitride-bonded high-grade carborundum parts by firing them in a nitrogen stream or in a coke charge in flame kilns. It is essential to have these method...

    N. I. Voronin, N. I. Krasotkina, V. A. Smirnova in Refractories (1960)

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