用“双套管法”淬火测定Cu:Cu-Al扩散偶中的相平衡,由于该法具有较快的冷却速度,保证了α/β相界面处于局部平衡.传统的淬火方法冷速通常是不够快的,不足以抑制β相的分解.较慢的冷却使界面形貌发生改变;测出的界面浓度是较低温度下的数值.有理由相信,Eifert等实验得到的各温度下都远较平衡浓度为高的α/β相界浓度,是由于实验过程中较慢的冷速所导致.
The concentration of the α/β interface in the Cu:Cu-Al diffusion coupleswas determined by rapid quenching using“duplex tube technique”which ensuredthe phase in local equilibrium owing to its more rapid cooling rate.It was obser-ved that the conventional quenching seems not a rapid enough treatment to re-tard the decomposition of β-phase.A slower cooling rate results in apparent mo-dification of the morphology of the two-phase interface.The interfacial concen-trations measured are those establishing at lower temperature equilibrium.It isreasonable to believe that the consistently and significantly higher interfacialconcentration determined by Eifert et al.may be caused by the slow cooling ofthe experimental alloys.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] |
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