Direct observation of local atomic order in a metallic glass

被引:326
作者
Hirata, Akihiko [1 ]
Guan, Pengfei [1 ]
Fujita, Takeshi [1 ]
Hirotsu, Yoshihiko [2 ]
Inoue, Akihisa [3 ]
Yavari, Alain Reza [1 ,4 ]
Sakurai, Toshio [3 ]
Chen, Mingwei [1 ,3 ]
机构
[1] Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Osaka Univ, R&D Inst Met & Composites Future Ind RIMCOF, Osaka 5670047, Japan
[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[4] Inst Natl Polytech Grenoble, CNRS, SIMAP, F-38402 St Martin Dheres, France
关键词
MEDIUM-RANGE ORDER; STRUCTURAL MODEL; PACKING;
D O I
10.1038/NMAT2897
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The determination of the atomic configuration of metallic glasses is a long-standing problem in materials science and solid-state physics(1,2). So far, only average structural information derived from diffraction and spectroscopic methods has been obtained. Although various atomic models have been proposed in the past fifty years(3-8), a direct observation of the local atomic structure in disordered materials has not been achieved. Here we report local atomic configurations of a metallic glass investigated by nanobeam electron diffraction combined with ab initio molecular dynamics simulation. Distinct diffraction patterns from individual atomic clusters and their assemblies, which have been theoretically predicted as short- and medium-range order(6-8), can be experimentally observed. This study provides compelling evidence of the local atomic order in the disordered material and has important implications in understanding the atomic mechanisms of metallic-glass formation and properties.
引用
收藏
页码:28 / 33
页数:6
相关论文
共 36 条
[1]   MICROSTRUCTURAL CHANGE IN THE COURSE OF DECOMPOSITION OF AN AMORPHOUS PD82SI18 ALLOY [J].
ANAZAWA, K ;
HIROTSU, Y ;
INOUE, Y .
ACTA METALLURGICA ET MATERIALIA, 1994, 42 (06) :1997-2007
[2]   GEOMETRY OF THE STRUCTURE OF MONATOMIC LIQUIDS [J].
BERNAL, JD .
NATURE, 1960, 185 (4706) :68-70
[3]   PROJECTOR AUGMENTED-WAVE METHOD [J].
BLOCHL, PE .
PHYSICAL REVIEW B, 1994, 50 (24) :17953-17979
[4]  
Borodin VA, 1999, PHILOS MAG A, V79, P1887, DOI 10.1080/01418619908210398
[5]   Atomic Level Structure in Multicomponent Bulk Metallic Glass [J].
Cheng, Y. Q. ;
Ma, E. ;
Sheng, H. W. .
PHYSICAL REVIEW LETTERS, 2009, 102 (24)
[6]  
Cowley J.M., 1995, Diffraction Physics, V3rd ed.
[7]   Electron nanodiffraction methods for measuring medium-range order [J].
Cowley, JM .
ULTRAMICROSCOPY, 2002, 90 (2-3) :197-206
[8]   Structural study of an amorphous NiZr2 alloy by anomalous wide-angle x-ray scattering and reverse Monte Carlo simulations -: art. no. 094210 [J].
de Lima, JC ;
Raoux, D ;
Tonnerre, JM ;
Udron, D ;
Machado, KD ;
Grandi, TA ;
de Campos, CEM ;
Morrison, TI .
PHYSICAL REVIEW B, 2003, 67 (09)
[9]  
Elliott S. R., 1990, PHYS AMORPHOUS MAT
[10]   MODELING STRUCTURES OF AMORPHOUS METALS AND ALLOYS [J].
FINNEY, JL .
NATURE, 1977, 266 (5600) :309-314