在等温和连续加热条件下测定了非晶态合金的脆化激活能。在两种加热条件下，非晶态合金对应于延－脆转变临界点的激活能数值非常接近，说明开始发生延－脆转变时受到相同的阻碍势垒，退火脆化与原子的热激后运动密切相关。实验结果还表明，脆化激活能随脆化程度的增大而单调升高并与脆化过程不同发展阶段相对应，是非晶态合金延－脆转变过程中原子热激活运动的两个基本特征非晶态合金的退火脆化不是具有恒定激活能的单一激活过程。
Through the determination of the values of activation energy for embrittlement under isothermal and isochronal conditions.the correlation between the ductile-brittle transition and thermally activated motion of atoms of the amorphous alloys in annealing has been revealed. And the character of thermally activated motion of atoms related to the embrittlement has been described. The matching of the values of activation energy for embrittlement determined under different conditions demonstrates that the potential barriers existed in the ductile-brittle transitions of the amorphous alloys in both isothermal and isochronal anneals are the same,and verifies the close relationship between annealing embrittlement and the thermally activated motion of atoms. The continued increase of activation energy for embrittlement during the brittling process and the correspondence of activation energy values with different transition stages characterize the ductile-brittle transition of amorphous alloys,so the transition is not the simple activating process with a constant activation energy.CHE Xiaozhou,post doctor, Shanghai Jiaotong University,Shanghai 200030
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