Investigation on structural instability induced relaxation and crystallization in ZrCuAlNi bulk metallic glass

摘要: The nature of internal friction peak associated with the first-order phase transformation remains an unsolved fundamental problem in many fields science and technology. Here, behaviors crystallization process Zr55Al10Ni5Cu30 bulk metallic glass were investigated. With increasing temperature, spectra exhibit a peak, which shows crossover from relaxation behavior to behavior. combined differential scanning calorimetry results show that at higher temperature is related amorphous alloy, while lower composed two processes: One originates transition other due structural instability before transformation. According coupling model compensation effect, primitive activation energies for are about 1.0 eV 1.4 eV, respectively. Therefore, it suggested mechanism sudden change parameters when happens.The cry...