金属玻璃P1峰弛豫激活能的一种计算新方法

提出了金属玻璃P1峰弛豫激活能的一种计算方法 .计算金属玻璃P1峰激活能的常用方法是由不同频率下升温测得的不同内耗峰的温频关系来求得 .然而 ,自由衰减法有限的变频范围 ,以及由于受晶化的影响 ,使两次升温测量时样品的初始状态不易重复 ;用强迫振动法测量时 ,同步变频条件限制了升温速率 ,造成金属玻璃的晶化过程严重影响了测量结果 .该方法仅用自由衰减法一次升温测得的内耗峰及损耗模量峰的温频关系 ,便可以计算出金属玻璃P1峰的弛激活能

A New Computation for the Relaxation Activation Energy of P 1 Peak in Metallic Glass

A new computation of the relaxation activation energy of P 1 peak in metallic glass is presented in this paper.Usually,the relaxation activation energy of P 1 peak in metallic glass is calculated by the relationship of internal friction peak temperatures and measuring frequencies during heating process.However,for free decay method,its range of changing frequency is very narrow and the initial states of samples are not easily repeated because of the effect of crystallization;for forced oscillation method,the measuring results are seriously affected by crystallization,which is caused by slow heating rates.In this paper,the relaxation activation energy of P 1 peak in metallic glass can be calculated by the peak temperature and measuring frequency data from internal friction peak and loss modulus peak,just using the data measured during one time heating process by free decay method.