Conclusions
The characteristic which distinguishes the composition material ÉGS-40 from graphite is its greater high-temperature erosion resistance. The range of useful properties is the same as that of other graphite materials so that the potential fields of application of ÉGS-40 are wide.
ÉGS-40, moreover, has a positive temperature-dependent coefficient of electrical resistance like that of most metals with electron conductivity, and an adequate emission power; the resistivity increases only slightly with the temperature.
The investigation demonstrated the efficiency of ÉGS-40 as electrode material for industrial-type open-cycle MHD generators. It may also find an application in electrothermics as heating element in an oxidizing medium and in other fields of high-temperature techniques.
It must be borne in mind that among the important considerations for the practical utilization of a given material are the economic factors, notably the cost of the material and its natural reserves. ÉGS-40 will probably be abundant and cheap because it is based on graphite.
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Translated from Ogneupory, No. 11, pp. 53–58, November, 1976.
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Petrov, Y.N., Kul'varskaya, B.S., Kan, K.S. et al. A composition material from graphite and high-melting compounds. Refractories 17, 709–713 (1976). https://doi.org/10.1007/BF01319870
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DOI: https://doi.org/10.1007/BF01319870