IMPURITY-INDUCED VACANCY CLUSTERING IN COLD-WORKED NICKEL

被引:89
作者
DLUBEK, G [1 ]
BRUMMER, O [1 ]
MEYENDORF, N [1 ]
HAUTOJARVI, P [1 ]
VEHANEN, A [1 ]
YLIKAUPPILA, J [1 ]
机构
[1] HELSINKI UNIV TECHNOL,DEPT TECH PHYS,SF-02150 ESPOO 15,FINLAND
来源
JOURNAL OF PHYSICS F-METAL PHYSICS | 1979年 / 9卷 / 10期
关键词
D O I
10.1088/0305-4608/9/10/007
中图分类号
O59 [应用物理学];
学科分类号
摘要
Isochronal and time-linear annealing of pure nickel and dilute NiSb-alloys (0.03 and 0.1 at.%Sb) cold rolled to different thickness reductions have been studied by positron lifetime, angular correlation and Doppler-broadening measurements. The results show that free vacancy migration occurs at the stage III around 80 degrees C. A small amount of Sb impurities induces three-dimensional vacancy clustering during the stage III. These microvoids grow continuously with further heating. After an annealing at 335 degrees C they become visible in the transmission electron microscope. The average microvoid size as a function of annealing temperature is estimated. The microvoids anneal out at 450 degrees C during the recrystallisation.
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页码:1961 / &
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