METHOD OF DETERMINING TEMPERATURE OF AMORPHOUS FERROMAGNETIC MICROWIRES DURING CURRENT HEATING Russian patent published in 2019 - IPC G01K7/16 G01K7/22 G01K15/00 G01N25/02 G01N25/12 G01N25/04 G01N25/20 

FIELD: technological processes.

SUBSTANCE: invention relates to processing of amorphous ferromagnetic wires (AFW) and can be used in determining temperature AFW during current heating. Disclosed solution is aimed at determining the temperature dependence of the resistance of the antiferromagnetic resonance at current heating by currents of different magnitude and shape. For this purpose, preliminary, by differential scanning calorimetry method, temperature of the beginning of crystallisation of one of samples AFW, withdrawn from batch AFW of the same type. Another sample AFW from the same batch is brought to complete crystallisation by first heating by current to temperature exceeding crystallization temperature. From obtained dependence of resistance AFW of power released in AFW from the passing current during the first heating, determining a resistance value corresponding to the beginning of crystallisation AFW. From measured values of resistance AFW at room temperature and temperature of crystallisation beginning temperature coefficient of resistance of crystallized AFW, which is used to convert measured during second and subsequent heating current relative changes in resistance value AFW into heating temperature values. Graphical dependences of temperature AFW from the power released in the microwire or from the current through the microconductor, converted to analytical relationships in the form of n-degree polynomials, is used to calculate the power or current values required to create the required heat modes of heating for the given batch AFW.

EFFECT: possibility of determining temperature of samples AFW directly during their current heating, more accurate setting of temperature modes of processing samples AFW and evaluation of temperature modes of heating and related effects of electrical and magnetic transformations in AFW.

7 cl, 4 dwg