Vacancy effects on the formation of He and Kr cavities in 3C-SiC irradiated and annealed at elevated temperatures

Vacancy effects on the formation of He and Kr cavities in 3C-SiC irradiated and annealed at elevated temperatures
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空位对高温辐照和退火 3C-SiC 中 He 和 Kr 空穴形成的影响

DOI:
10.1016/j.nimb.2016.11.017
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发表时间:
2016-12
期刊:
Nucl. Instruments Methods Phys. Res. Sect. B
影响因子:
--
通讯作者:
王志光
王志光
中科院分区:
其他
文献类型:
--
作者:
臧航;Weilin Jiang;柳文波;A. Devaraj;D.J. Edwards;C.H. Henager;R.J. Kurtz;李涛;贺朝会;恽迪;王志光

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在400和750 c下,将多晶3C-SIC分别在400和750 c下分别用120 keV HE2+和4 MeV KR15+。离子至1017和4 1016 CM2。 KR15+离子穿透了He2+ .ion植入的整个深度区域。 He2+,Kr15+和He2++ Kr15+离子植入SIC的三个区域是通过卸载重叠辐射的三个区域。随后将样品在1600 c的真空中退火并进行表征。使用横截面透射电子显微镜和能量分散性X射线光谱。共同植入的SIC。在25 dpa时,在共植入的3C-SIC中存在显着促进。在KR15+离子中形成了较小的空隙,仅在相同剂量下受辐照的SIC。此外,局部kr迁移和空腔捕获的发生,但SIC中的远距离KR扩散却不是1600 C.
Polycrystalline 3C-SiC was sequentially irradiated at 400 and 750 C with 120 keV He2+ and 4 MeV Kr15+.ions to 1017 and 4 1016 cm2, respectively. The Kr15+ ions penetrated the entire depth region of the He2+.ion implantation. Three areas of He2+, Kr15+ and He2+ + Kr15+ ion implanted SiC were created through.masked overlapping irradiation. The sample was subsequently annealed at 1600 C in vacuum and characterized.using cross-sectional transmission electron microscopy and energy-dispersive X-ray spectroscopy..Compared to the He2+ ion only implanted SiC, He cavities show a smaller size and higher.density in the co-implanted SiC. At 25 dpa, presence of He in the co-implanted 3C-SiC significantly promotes.cavity growth; much smaller voids are formed in the Kr15+ ion only irradiated SiC at the same dose..In addition, local Kr migration and trapping at cavities occurs, but long-range Kr diffusion in SiC is not.observed up to 1600 C.
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