Thermal Characteristics of Amorphous Fe–Ni–Si–C Alloys

Differential scanning calorimetry (DSC) is used to study the phase transformations of four amorphous metal alloys based on transition metals Fe and Ni with additives of Si and C. The temperature dependences of the heat flux upon phase transformations are measured along with changes in the mass and specific heat capacity of amorphous alloys. Two phase transformations associated with the temperature of glass transition and complete crystallization are identified. The relative volume of the crystalline fraction of alloys heated to 1000°C is calculated. It is concluded there are nanocrystalline phases between the first and second phase transitions at heating rates of 0.1°C/s.