Atomic origins of solid helium bubbles in tungsten

被引：1

作者：

Xia Min ^{[1
,3
]}

Guo Hong-Yan ^{[1
,3
]}

Dai Yong ^{[2
]}

Yan Qing-Zhi ^{[1
]}

Guo Li-Ping ^{[4
]}

Li Tie-Cheng ^{[4
]}

Qiao Yi ^{[1
]}

Ge Chang-Chun ^{[1
,3
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Nucl Mat, Beijing 100083, Peoples R China

[2] Paul Scherrer Inst, Lab Nucl Mat, CH-5323 Villigen, Switzerland

[3] Southwest Jiaotong Univ, Inst Powder Met & Adv Ceram, Chengdu 610031, Peoples R China

[4] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 12期

基金：

中国国家自然科学基金;

关键词：

solid helium bubble; atomic origins; tungsten; TEM; HAADF-STEM; EQUATION-OF-STATE; X-RAY-DIFFRACTION; PHASE-DIAGRAM; HE-4;

D O I：

10.1088/1674-1056/23/12/127806

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Solid helium bubbles were directly observed in the helium ion implanted tungsten (W), by different transmission electron microscopy (TEM) techniques at room temperature. The diameters of these solid helium bubbles range from 1 nm to 8 nm in diameter with the mean bubble size about 3 nm. The selected area electron diffraction (SAED) and fast Fourier transform (FFT) images revealed that solid helium bubbles possess body-centered cubic (bcc) structure with a lattice constant of 0.447 nm. High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) images further confirmed the existence of helium bubble in tungsten. The present findings provide an atomic level view of the microstructure evolution of helium in the materials, and revealed the existence of solid helium bubbles in materials.

引用

页数：4

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