scholarly journals Synchrotron radiation studies of local structure and bonding in transition metal aluminides and rare earth transition metal magnetic nitrides. Final report, August 1, 1990--July 14, 1993

10.2172/64219 ◽  
1995 ◽  
Author(s):  
J.I. Budnick ◽  
D.M. Pease
Keyword(s):  
Rare Earth ◽  
Synchrotron Radiation ◽  
Transition Metal ◽  
Local Structure ◽  
Final Report ◽  
Structure And Bonding ◽  
Metal Aluminides

Local Structure and Bonding of Transition Metal Dopants in Bi2Se3 Topological Insulator Thin Films

2015 ◽  
Vol 119 (30) ◽  
pp. 17344-17351 ◽  
Author(s):  
Adriana I. Figueroa ◽  
Gerrit van der Laan ◽  
Liam J. Collins-McIntyre ◽  
Giannantonio Cibin ◽  
Andrew J. Dent ◽  
...  
Keyword(s):  
Thin Films ◽  
Transition Metal ◽  
Topological Insulator ◽  
Local Structure ◽  
Structure And Bonding

EELS Studies of B2-Type Transition Metal Aluminides: Experiment and Theory

1995 ◽  
Vol 408 ◽  
Author(s):  
G. A. Bottonm ◽  
G. Y. Guo ◽  
W. M. Temmerman ◽  
Z. Szotek ◽  
C. J. Humphreys ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Detailed Comparison ◽  
Electronic Structure Calculations ◽  
Intermetallic Alloys ◽  
Potential Approximation ◽  
Structure And Bonding ◽  
Metal Aluminides ◽  
Electron Energy Loss ◽  
Structure Calculations

AbstractThe electronic structure and bonding character of intermetallic alloys are investigated by a combination of electron energy loss spectroscopy (EELS) experiments and ab initio electronic structure calculations. A detailed comparison is made between experimental spectra and calculations. The changes in electronic structure within a transition metal alurninide series and also due to alloying are studied using EELS spectra. The Korringa-Kohn-Rostoker coherent-potential-approximation method and large supercell models are used to investigate changes in composition and the effect of dopants on the electronic structure.

Electron energy loss near edge structures of intermetallic alloys and grain boundaries in NiAl

1996 ◽  
Vol 54 ◽  
pp. 522-523
Author(s):  
G.A. Botton ◽  
C.J. Humphreys
Keyword(s):  
High Temperature ◽  
Transition Metal ◽  
Energy Loss ◽  
Grain Boundaries ◽  
Industrial Applications ◽  
Edge Structure ◽  
Structural Applications ◽  
Yield Behaviour ◽  
Late Transition ◽  
Metal Aluminides

Transition metal aluminides are of great potential interest for high temperature structural applications. Although these materials exhibit good mechanical properties at high temperature, their use in industrial applications is often limited by their intrinsic room temperature brittleness. Whilst this particular yield behaviour is directly related to the defect structure, the properties of the defects (in particular the mobility of dislocations and the slip system on which these dislocations move) are ultimately determined by the electronic structure and bonding in these materials. The lack of ductility has been attributed, at least in part, to the mixed bonding character (metallic and covalent) as inferred from ab-initio calculations. In this work, we analyse energy loss spectra and discuss the features of the near edge structure in terms of the relevant electronic states in order to compare the predictions on bonding directly with spectroscopic experiments. In this process, we compare spectra of late transition metal (TM) to early TM aluminides (FeAl and TiAl) to assess whether differences in bonding can also be detected. This information is then discussed in terms of bonding changes at grain boundaries in NiAl.

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