Metal glass evaluation

Patent Pending PROBLEM TO BE SOLVED: To provide a metal glass evaluation method capable of precisely and simply evaluating the existence of the crystallization or internal flaw of metal glass by a single method, and to provide a metal glass evaluation apparatus. ; SOLUTION: AC is applied to the coil brought into contact with the surface of the metal glass and, on the basis of a change in the produced eddy current signal, presence of crystallization or internal flaw of the metal glass is detected.