Atomic Bonding and Properties of Al-Li Alloy in Earlier Ageing Stage

2007 ◽  
Vol 546-549 ◽  
pp. 819-824
Author(s):  
Ying Jun Gao ◽  
Qi Feng Mo ◽  
Yu Ling Wang ◽  
Iina Zhang ◽  
Chuang Gao Huang
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Metastable Phase ◽  
Covalent Bond ◽  
Range Order ◽  
Order Structure ◽  
Empirical Electron Theory ◽  
Ageing Condition ◽  
Precursor Structure ◽  
The Difference

The atomic bonding of the segregated cell of Al-Li alloy in earlier ageing condition was calculated according to the empirical electron theory (EET) in solid. The results showed that the strongest covalent bond was the Al-Al bond in the segregated cell without vacancy, while the strongest covalent bond was the Al-Li bond in the cell containing vacancy. Since the difference of electronagativity between the Al and Li atoms was obvious, it was inclined to form the Al-Li segregated cell of short range order structure in the condition of vacancy joining. The short range order structure with vacancy was probably the embryo or precursor structure of the metastable phase ' δ (Al3Li). As the ' δ (Al3Li) was coherence with matrix, the bond net strength was enhanced by the precipitation of ' δ (Al3Li) and hence the alloy was strengthened.

Characteristic features of short-range-order structure of melts of Pb-Tl-Cd(Sn) ternary systems

1979 ◽  
Vol 22 (5) ◽  
pp. 484-486
Author(s):  
Ya. I. Dutchak ◽  
N. M. Klym ◽  
S. I. Mudryi ◽  
V. S. Frenchko
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Ternary Systems ◽  
Range Order ◽  
Order Structure ◽  
Characteristic Features

Ab initio simulation of the short-range order structure of Al ions and substitutional Fe, Cr impurities in S.S. Spinel (MgAl2O4)

2004 ◽  
Vol 100 (4) ◽  
pp. 567-572 ◽  
Author(s):  
S. L. Votyakov ◽  
A. V. Porotnikov ◽  
Yu. V. Shchapova ◽  
E. I. Yuryeva ◽  
A. L. Ivanovskii
Keyword(s):  
Ab Initio ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Structure ◽  
Ab Initio Simulation ◽  
Spinel Mgal2o4 ◽  
Substitutional Fe

Studies of short range order structure in the high-Tc superconductor Y-Ba-Cu-O using X-ray absorption techniques

1989 ◽  
Vol 158 (1-3) ◽  
pp. 465-466 ◽  
Author(s):  
A. Krol ◽  
L.Y. Jang ◽  
S.C. Woronick ◽  
F. Xu ◽  
Y.D. Yao ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Structure ◽  
High Tc ◽  
X Ray ◽  
High Tc Superconductor ◽  
X Ray Absorption

Short-range order structure of amorphous Cr3Ge films

1977 ◽  
Vol 20 (12) ◽  
pp. 1626-1629
Author(s):  
E. S. Levin ◽  
Yu. S. Alekseev ◽  
P. V. Gel'd
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Structure

Short-range order structure and effective pair-interaction energy in Ni–Si alloys

2007 ◽  
Vol 55 (16) ◽  
pp. 5382-5388 ◽  
Author(s):  
Takumi Hasegawa ◽  
Keiichi Osaka ◽  
Toshihiko Takama ◽  
Haydn Chen
Keyword(s):  
Interaction Energy ◽  
Short Range ◽  
Short Range Order ◽  
Pair Interaction ◽  
Range Order ◽  
Order Structure ◽  
Pair Interaction Energy ◽  
Effective Pair

The short-range-order structure of α-phase Cu–Al alloys

1978 ◽  
Vol 34 (5) ◽  
pp. 667-681 ◽  
Author(s):  
J. E. Epperson ◽  
P. Fürnrohr ◽  
C. Ortiz
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Al Alloys ◽  
Range Order ◽  
Order Structure ◽  
Α Phase

Short-range-order structure of amorphous hydrous erbium oxide

1984 ◽  
Vol 40 (3) ◽  
pp. 264-269 ◽  
Author(s):  
W. O. Milligan ◽  
D. F. Mullica ◽  
H. O. Perkins ◽  
C. K. C. Lok ◽  
J. J. McCoy ◽  
...  
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Structure ◽  
Erbium Oxide

Short-Range Order in KPO3 Glass Studied by Neutron and X-Ray Diffraction

1996 ◽  
Vol 51 (3) ◽  
pp. 179-186 ◽  
Author(s):  
Uwe Hoppe ◽  
Günter Walter ◽  
Dörte Stachel ◽  
Alex C. Hannon
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bond Lengths ◽  
Spherical Cavities ◽  
The Difference

The short-range order of KPO3 glass has been studied by diffraction methods in order to make evident the different behaviour of the P-O bonds within the PO4 tetrahedron. The oxygen sites are devided into bridging and terminal (non-bridging) oxygen sites, corresponding to two P-O bond lengths, the difference of which amounts to 14.5 pm. Previous conclusions about the changes of the P-O bond lengths under the influence of modifier cations of different electric field strength are corroborated. The K-O environments reveal two apparently different distances rKO with equal contributions to the total K-O coordination number of about 6.7. To explain this phenomenon, the K+ cations are suggested to be located in non-spherical cavities

Sign in / Sign up

Export Citation Format

Share Document