Articles

 

1.
№3-4, 2018
УДК 621.775.8
Zimichev A.M.1, Varrik N.M.1, Sumin V.A.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • TO A QUESTION OF FORMATION OF CONTINUOUS REFRACTORY ALUMINA-BASED FIBERS
    High-temperature heat-insulating materials on the basis of heat-resistant fibers are one of priority objects of development of materials scientists now. The alumina continuous fibers used for manufacture of the flexible high-temperature sealing heat-insulating materials working at temperatures over 1500°C, such as fabrics, braidings and cords. Flexibility of the continuous fibers received by sol-gel method depends on a number of factors. Structure and composition of the ceramic fiber received by this multistage process are depend on the quality of the used precursors, conditions of process of evaporation of spinning solution, the form of orifices and conditions of extrusion of green fibers from solution and conditions of the subsequent heat treatment during of which there are chemical and phase transformations occuring. In this paper influence of characteristics of spinning solution and some conditions of formation of a fiber on structure and properties of the received alumina fibers w
    Keywords: continuous ceramic fibers, sol-gel method, precursor, alumina, high temperature heat-insulating material.


    2.
    №1-2, 2018
    УДК 620.197
    Denisova V.S.1, Rozenenkova V.A.1, Agarkov A.B.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • HIGH TEMPERATURE GLASS CERAMIC COATING FOR HEAT RESISTANT NICKEL ALLOYS PROTECTION
    The heat resistant glass ceramic coating was developed for heat resistant nickel alloy protection. The technology heat-resistant glass-ceramic coating fabrication was obtained for protection of combustion chambers made of high-strength weldable alloy. The main properties of heat resistant glass-ceramic coating were investigated, e.g. bonding strength, thermal stress resistance, heat resistance. Heat-resistant glass-ceramic coating fabrication is easy to provide, the coating is non-porous and fine for dimentional complex details.
    Keywords: thermal stress resistance, heat resistance, coating, nickel alloy, hot corrosion, glass.


    3.
    №5-6, 2017
    УДК 666.7
    Varrik N.M.1, Maksimov V.G.1
  • [1] Federal State Unitary Enterprise All-Russian Scientific Research Institute of Aviation Materials State Research Center of the Russian Federation
  • THE FIBROUS CERAMIC MATERIAL BASED ON ZIRCONIA FOR ALKALINE BATTERIY’S SEPARATORS
    In this paper was assessing the possibility of creating a porous flexible dielectric composite material based on refractory oxide fibers for the separators of chemical power sources: alkaline batteries and fuel cells designed for power supply systems of aircraft, marine, automotive and household batteries. It was carry out the comparative analysis of the properties of separation of materials of three kinds, proven ability of obtaining a porous composite material based on fibers of zirconium oxide having a high resistance to concentrated alkaline solution and a satisfactory mechanical strength. The investigation of obtained samples showed that the zirconia fibers with high thermal stability and chemical resistance, particularly to alkalis, have good prospects for the manufacture of separators alkaline batteries, especially in those cases where it is necessary combination of high power characteristics with increased reliability and service life.
    Keywords: zirconia fiber, alkaline battery separator, a fibrous ceramic material.