Dependence of void nucleation on post-irradiation annealing temperature in α-Al2O3

Dependence of void nucleation on post-irradiation annealing temperature in α-Al₂O₃

XU Yong-Jun，

FAN Zhi-Guo，

LUO Qi，

WANG Rong，

ZHU Jia-Zheng，

IWATA Tadao，

MINAMISONO T，

MATSUTA K，

FUKUDA M，

MIHARA M，

ZHU Sheng-Yun

Nuclear Science and Techniques

Vol.12, No.1

pp.36-39

Published in print 01 Feb 2001

CLC：O571.32+, O77+4, TG156.2, O472

23000

The evolution of void nucleation in α-Al₂O₃ irradiated by En ≥ 1 MeV neutrons of 3×10²⁰cm^-2 and post-annealed from 100℃ to 1050℃ is studied by a positron annihilation lifetime technique. The void nucleation starts at 500℃. The radius of created voids is 0.31 nm and the number of voids increases with increasing annealing temperature from 550℃ to 750℃. Afterwards, the radius of voids increases rapidly and reaches 1.21nm at 1050℃.

α-Al2O3Neutron irradiationPost annealingEvolution of void nucleationPositron lifetime technique

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