Effect of manganese on sintering processes in the Ti-Fe system. III. High-temperature x-ray diffraction investigation of the sintering process

Conclusions The temperatures of accelerated formation of intermetallic compounds in the Ti-Fe-Mn system correspond to the temperatures of sharp changes in the direction and rate of the sintering process and also of the appearance of heat evolution peaks. The rate of heating of compacts to sintering temperatures affects the mechanism of formation of intermetallic compounds: At lower rates of heating intermetallic compounds are formed by solid-phase reaction, while at higher rates the role of liquid phase grows. A relation has been established between the composition of the intermetallic compounds forming during sintering and the behavior of specimens during this process at various heating rates. At higher rates of heating of Ti-Fe-Mn compacts Ti-Fe intermetallic compounds are formed containing no Mn; the behavior of these specimens during sintering is similar to that of Ti-Fe compacts (the specimens grow). At lower heating rates intermetallic compounds alloyed with Mn are formed, and growth of specimens is followed by their shrinkage.Translated from Poroshkovaya Metallurgiya, No. 4(304), pp. 23–28, April, 1988.