全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
核技术  2014 

同步辐射小角散射法和中子衍射法研究中子辐照Al-B合金结构

DOI: 10.11889/j.0253-3219.2014.hjs.37.090103, PP. 90103-90103

Keywords: 掺硼铝,中子辐照,氦行为,小角散射,中子衍射

Full-Text   Cite this paper   Add to My Lib

Abstract:

为了研究He在材料中的行为,借助10B的(n,α)核反应,通过反应堆热中子对Al-B合金进行辐照,引入He原子密度达6.2×1025m?3。采用同步辐射X射线小角散射法(SynchrotronsmallangleX-rayscattering,SAXS)原位测试了不同温度下合金中He的状态变化,并结合透射电镜(Transmissionelectronmicroscope,TEM)对试样进行了观察;采用X射线衍射和中子衍射法分析了合金晶格参数的变化。SAXS分析表明,随着温度升高试样内部的颗粒和孔洞消失,He泡数量不断增多、尺寸增大。700oC下He泡的半径大约增大到10nm,与室温时颗粒和孔洞相当。衍射分析表明,B原子引入使得Al晶格常数增大,但不存在可见的第二相,中子辐照使得生成的Li和He原子进入Al晶格,进一步加大了晶格常数。辐照后的样品加热使得He从晶格间隙位置扩散到晶界形成He泡,从而缓解了对晶格的挤压,导致了晶格常数的回复减小,第一性原理计算得到的间隙原子B、Li、He引起的晶格肿胀解释了这一结果。

References

[1]  10 Jostsons A, DuBose C K H, Copeland G L, et al. Defect structure of neutron irradiated boron carbide[J]. J. Nucl. Mater., 1973, 49(2): 136-150
[2]  11 Glam B, Eliezer S, Moreno D, et al. Helium bubbles formation in aluminum: Bulk diffusion and near-surface diffusion using TEM observations[J]. J. Nucl. Mater., 2009, 392(3): 413-419
[3]  12 Duschanek H,Rogl P. The Al-B (aluminum-boron) system[J]. J. Phase Equilib., 1994, 15(5): 543-552
[4]  13 Nowak S K. Solid Solubility of Li in Al[J]. Trans. AIME, 1956, 206:553-556
[5]  1 Trinkaus H,Singh B N. Helium accumulation in metals during irradiation – where do we stand?[J]. J. Nucl. Mater., 2003, 323(2–3): 229-242
[6]  2 Thomas G J,Bauer W. Helium implantation effects in palladium at high doses[J]. Radiat. Eff., 1973, 17(3-4): 221-234
[7]  3 Charlot L A, Brimhall J L,Atteridge D G. Transmission electron microscopy on helium implanted niobium tensile specimens[J]. J. Nucl. Mater., 1977, 66(1–2): 203-208
[8]  4 Farrell K,Packan N H. A helium-induced shift in the temperature dependence of swelling[J]. J. Nucl. Mater., 1979, 85–86, Part 2(0): 683-687
[9]  5 Chen C G, Birnbaum H K,Johnson Jr A B. Resistivity studies of interstitial helium mobility in niobium[J]. J. Nucl. Mater., 1979, 79(1): 128-134
[10]  6 J?Ger W, L?Sser R, Schober T, et al. Formation of helium bubbles and dislocation loops in tritium-charged vanadium[J]. Radiat. Eff., 1983, 78(1-4): 165-176
[11]  7 周晓松, 申华海, 彭述明, 等. 铒、钪膜中离子注入氦的热解析行为[J]. 强激光与粒子束, 2012, 24(5): 1169-1172 (Zhou X S, Shen H H, Peng S M, et al. Thermal desorption behavior of ion-implanted helium from erbium and scandium films[J]. High Power Laser and Particle Beams, 2012, 24(5): 1169-1172)
[12]  8 贾建平, 施立群, 赖新春,等. 直流磁控溅射法制备含氦铝膜[J]. 原子能科学技术, 2006, 40(3): 372-376(Jia J P, Shi L Q, Lai X C, et al., Helium-charged aluminium films deposited by direct current magnetron sputtering[J], atomic energy science and technology, 2006, 40(3): 372-376)
[13]  9 Nagasaki R, Ohashi S, Kawasaki S, et al. Behavior of Helium Gas Bubbles in Neutron-Irradiated Beryllium[J]. J. Nucl. Sci. Technol., 1971, 8(10): 546-552

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133