Reaction of titanium carbide with steel during sintering

Conclusion It has been confirmed — qualitatively by x-ray structural analysis and metallographic examination and quantitatively by chemical and x-ray spectral analyses — that the components of a titanium-carbide-Kh6V3M-steel alloy react with each other during sintering and heat treatment.Translated from Poroshkovaya Metallurgiya, No. 8(176), pp. 34–38, August, 1977.     

Reaction of boron carbide with titanium under ordinary and plasma heating conditions

Conclusions As a result of an investigation, into the high-temperature solid-phase reaction of boron carbide with titanium under ordinary and plasma heating conditions, it has been established that the reaction, which begins at 1300°C, is slow in its final stage, which is due to the appearance of a zone of porosity and to disturbed contact between the reactants. Because of this, in spite of its being accompanied by an appreciable thermal effect, the reaction fails to proceed to completion under conditions of both continual ordinary heating (to 1600°C) and plasma heating. It is possible to obtain spray-deposited coatings of the required composition (TiC+TiB₂) by employing preconglomerated or clad Ti -B₄C powders and preheated basis plates.Translated from Poroshkovaya Metallurgiya, No. 9(213), pp. 47—53, September, 1980.     

Reaction of aqueous titanium carbide suspensions with an acid and an alkali

Conclusions Using the techniques of conductometrie and potentiometric titrations of suspensions and aqueous and salt extracts, a study was made of the reaction of titanium carbide with hydrochloric acid and caustic soda. The absorption of the acid and the alkali by commercial titanium carbide is mainly due to the impurities present in it. Titanium carbide freed from impurities picks up hydrogen and hydroxyl ions by an adsorption mechanism, the adsorption taking place in the inner lining of the double electric layer of the solid phase in suspension.Translated from Poroshkovaya Metallurgiya, No. 7 (91), pp. 72–78, July, 1970.     

Sintering kinetics of titanium carbide with Hadfield steel

Conclusions Liquid-phase sintering of composites of high binder content promotes the formation of an austenitic-martensitic structure in the binder. Raising the sintering temperature leads to vigorous recrystallization by the solution-precipitation mechanism and to the formation of an austenitic-pearlitic structure in the binder and an annular structure in the carbide.Translated from Poroshkovaya Metallurgiya, No. 7(331), pp. 13–16, July, 1990.     

Infiltration of titanium carbide and titanium diboride base cermets with metallic melts

Conclusions Sintered TiC-Fe(Ni), TiC-Ni(Mo), and TiB₂-Fe(Mo) materials readily absorb additional amounts of molten metal, which is linked with a transformation of the solid-phase skeleton and growth in specimen volume. The degree of the increase in specimen dimensions constitutes an indicator of the intensity of this process. By varying the composition of the metallic binder of such a cermet it is possible to regulate the intensity of the process of transformation of the solid-phase skeleton, the rate of migration of molten metal into the cermet, and the distribution of the cementing phase in the specimen after contact with the melt. Raising the temperature of the preceding sintering operation lowers the intensity of transformation of the solid-phase skeleton during the subsequent contact of the cermet with the melt. Under the conditions of the above-described experiment, the processes of diffusional equalization of composition of the metallic binder predominate over the process of laminar flow of molten metal into the specimen.Translated from Poroshkovaya Metallurgiya, No. 7(271), pp. 58–62, July, 1985.     

Reaction of boron carbide powders with biochemical media

The EPR signals have been detected in boron nitride powders (BN_g and hexanite-A) from: carbon atoms substituting for nitrogen atoms in the BN_g lattice; iron-containing formations; various carbon-containing inclusions. Treatment of these powders in different biochemical and control inorganic media was generally accompanied by changes in the intensity of some signals (in the BN_g specimens) which reflect reactions with the media of real inclusions present in the commercial powders. Translated from Poroshkovaya Metallurgiya, Nos. 1–2(411), pp. 82–88, January–February, 2000.     

Kinetics of oxidation SHS of titanium carbide and titanium and chromium double carbide powders in air

Institute of Structural Macrokinetics, Russian Academy of Sciences, Chernogolovka. Translated from Poroshkovaya Metallurgiya, No. 6(366), pp. 51–54, June, 1993.