TY - JOUR
T1 - Production and stability of dislocation loops in an MgO-Al2O3 system under concurrent irradiation with ions and electrons
AU - Yasuda, Kazuhiro
AU - Kinoshita, Chiken
AU - Ohmura, Masaki
AU - Abe, Hiroaki
N1 - Funding Information:
All the irradiation and TEM experiments were carried out in TIARA at JAERI and in HVEM laboratory at Kyushu University. This work was supported in part by Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture in Japan and Inoue Foundation for Science.
PY - 2000/5/2
Y1 - 2000/5/2
N2 - In situ microstructure observations have been carried out for crystals of an MgO-Al2O3 system under concurrent irradiation with ions and electrons in a TEM-accelerator facility to gain insights into their concurrent irradiation effects. MgO·Al2O3, MgO·2.4Al2O3 and α-Al2O3 were irradiated concurrently with 300 keV O+ and 200 keV electrons or solely with 300 keV O+ at 870 K. Retardation of dislocation loop nucleation was observed in MgO·Al2O3, and MgO·2.4Al2O3 crystals under the concurrent irradiation, though no significant changes were observed in the microstructure of α-Al2O3 between regions irradiated concurrently with ions and electrons, and irradiated solely with ions. Further, the concurrent irradiation has been found to enhance the growth of dislocation loops in MgO·Al2O3 and MgO·2.4Al2O3 at the periphery of a focused electron beam. The different response in the concurrent irradiation effects among the crystals of MgO-Al2O3 system are discussed in terms of the nucleation rate of dislocation loops under 300 keV O+ irradiation and the stability of loops under electron irradiation, which depend on electron energy and irradiation temperature.
AB - In situ microstructure observations have been carried out for crystals of an MgO-Al2O3 system under concurrent irradiation with ions and electrons in a TEM-accelerator facility to gain insights into their concurrent irradiation effects. MgO·Al2O3, MgO·2.4Al2O3 and α-Al2O3 were irradiated concurrently with 300 keV O+ and 200 keV electrons or solely with 300 keV O+ at 870 K. Retardation of dislocation loop nucleation was observed in MgO·Al2O3, and MgO·2.4Al2O3 crystals under the concurrent irradiation, though no significant changes were observed in the microstructure of α-Al2O3 between regions irradiated concurrently with ions and electrons, and irradiated solely with ions. Further, the concurrent irradiation has been found to enhance the growth of dislocation loops in MgO·Al2O3 and MgO·2.4Al2O3 at the periphery of a focused electron beam. The different response in the concurrent irradiation effects among the crystals of MgO-Al2O3 system are discussed in terms of the nucleation rate of dislocation loops under 300 keV O+ irradiation and the stability of loops under electron irradiation, which depend on electron energy and irradiation temperature.
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U2 - 10.1016/S0168-583X(99)00738-7
DO - 10.1016/S0168-583X(99)00738-7
M3 - Conference article
AN - SCOPUS:0033729174
SN - 0168-583X
VL - 166
SP - 107
EP - 114
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
T2 - 10th International Conference on Radiation Effects in Insulators
Y2 - 18 July 1999 through 23 July 1999
ER -