Ab-initio data for interatomic interactions in Zr-rich ZrX (X = Sc-Cu) alloys and stability of icosahedron-like Zr13-nCun (n=3, 4) clusters in Zr70Cu30 metallic glass

被引:11
作者
Fujima, N. [1 ]
Asato, M.
Tamura, R.
Hoshino, T.
机构
[1] Shizuoka Univ, Fac Engn, Hamamatsu, Shizuoka 4328561, Japan
[2] Tokyo Metropolitan Univ, Coll Ind Technol, Tokyo 1400011, Japan
[3] Shizuoka Univ, Grad Sch Sci & Technol, Nanomat Sect, Hamamatsu, Shizuoka 4328561, Japan
关键词
alloy design; electronic structure of metals; defect; point defects; site occupancy; ab-initio calculations;
D O I
10.2320/matertrans.MJ200743
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We give ab-initio data for the study of the stability of the atomic structures of Zr-rich ZrX (X = Sc-Cu) alloys, such as the cohesive energies and equilibrium Wigner-Seitz radii of elemental metals X (X = Sc-Cu, Zr-Ag) and X-X (X = Sc-Cu) interaction energies in Zr. The calculations are based on the density functional thoery in the generalized gradient approximation and employ the full-potential Korringa-Kohn-Rostoker Green's function method. Using the calculated results, we elucidate the fundamental features of interatomic interactions of Zr-rich ZrX alloys. Especially, we found that the pair interaction Of Cu impurities in Zr becomes strongly attractive around the interatomic distance of 0.45 similar to 0.46 nm. It is shown that this interaction may be important for the stability of icosahedron-like local atomic structures of Zr10Cu3 and Zr9Cu4 clusters in the Zr70Cu30 bulk metallic glass, being proposed experimentally. We also found that the atomic structure of an isolated Zr10X3 cluster transforms from the hcp structure (initial state) to an icosahedron-like structure (final state) for X = Cu, but not for X=Ni.
引用
收藏
页码:1734 / 1738
页数:5
相关论文
共 17 条
[1]   Full-potential KKR calculations for point defect energies in metals, based on the generalized-gradient approximation: II. Impurity-impurity interaction energies and phase diagrams [J].
Asato, M ;
Mizuno, T ;
Hoshino, T ;
Sawada, H .
MATERIALS TRANSACTIONS, 2001, 42 (11) :2216-2224
[2]   Slater-Pauling behavior and origin of the half-metallicity of the full-Heusler alloys [J].
Galanakis, I ;
Dederichs, PH ;
Papanikolaou, N .
PHYSICAL REVIEW B, 2002, 66 (17) :1-9
[3]   First-principles calculations for vacancy formation energies in Cu and Al; non-local effect beyond the LSDA and lattice distortion [J].
Hoshino, T ;
Papanikolaou, N ;
Zeller, R ;
Dederichs, PH ;
Asato, M ;
Asada, T ;
Stefanou, N .
COMPUTATIONAL MATERIALS SCIENCE, 1999, 14 (1-4) :56-61
[4]   First-principles calculations for stability of atomic structures of Al-rich AIX (X = Sc-Zn) alloys, including AlMn quasicrystal: I. Solution energies of X in Al [J].
Hoshino, T. ;
Asato, M. ;
Fujima, N. .
INTERMETALLICS, 2006, 14 (8-9) :908-912
[5]   First-principles calculations for stability of atomic structures of Al-rich AIX (X = Sc-Zn) alloys, including AlMn quasicrystal: II. Medium-ranged interactions of X pairs in Al [J].
Hoshino, T. ;
Asato, M. ;
Tanaka, S. ;
Nakamura, F. ;
Fujima, N. .
INTERMETALLICS, 2006, 14 (8-9) :913-916
[6]   MAGNETIC ENERGY ANOMALIES OF 3D SYSTEMS [J].
HOSHINO, T ;
ZELLER, R ;
DEDERICHS, PH ;
WEINERT, M .
EUROPHYSICS LETTERS, 1993, 24 (06) :495-500
[7]  
HOSHINO T, UNPUB
[8]  
HOSHINO T, 2004, T MAT RES SOC JAPAN, V30, P877
[9]  
HOSHINO T, 2001, MAT T, V42, P2501
[10]   Structural stability and lattice defects in copper:: Ab initio, tight-binding, and embedded-atom calculations -: art. no. 224106 [J].
Mishin, Y ;
Mehl, MJ ;
Papaconstantopoulos, DA ;
Voter, AF ;
Kress, JD .
PHYSICAL REVIEW B, 2001, 63 (22) :2241061-22410616