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Classical interatomic potential for Nb-alumina interfaces

Albe, Karsten ; Benedek, R. ; Averback, R. S. ; Seidman, D. N. :
Classical interatomic potential for Nb-alumina interfaces.
[Online-Edition: http://dx.doi.org/10.1557/PROC-654-AA4.3.1]
In: 2000 MRS Fall Meeting. In: Materials Research Society: Fall Meeting 2000. - Warendale, PA: MRS, 2001.- (MRS proceedings ; 654).- S. AA4.3.2 , 654 . MRS , Warendale, PA
[Konferenz- oder Workshop-Beitrag], (2000)

Offizielle URL: http://dx.doi.org/10.1557/PROC-654-AA4.3.1

Kurzbeschreibung (Abstract)

A modified-embedded-atom-method (MEAM) potential is derived for the ternary system Al-O-Nb in order to simulate the model oxide-metal interface sapphire-niobium. In the present work, MEAM parameters for Al and O given by Baskes were adopted, and the parameters for Nb are adjusted to match experimental data for pure Nb and calculated properties for Nb oxides and aluminides. The properties for niobium oxides and aluminides were obtained from local- density-functional-theory (LDFT) calculations. The resultant potential was tested in simulations for the Nb(111)/α -alumina(0001) interface. MEAM predictions of the work of separation and the interlayer relaxations for two interface terminations are in excellent agreement with LDFT calculations. The MEAM potential therefore appears suitable for large-scale computer simulation of oxide-metal interface properties.

Typ des Eintrags: Konferenz- oder Workshop-Beitrag (Keine Angabe)
Erschienen: 2000
Autor(en): Albe, Karsten ; Benedek, R. ; Averback, R. S. ; Seidman, D. N.
Titel: Classical interatomic potential for Nb-alumina interfaces
Sprache: Englisch
Kurzbeschreibung (Abstract):

A modified-embedded-atom-method (MEAM) potential is derived for the ternary system Al-O-Nb in order to simulate the model oxide-metal interface sapphire-niobium. In the present work, MEAM parameters for Al and O given by Baskes were adopted, and the parameters for Nb are adjusted to match experimental data for pure Nb and calculated properties for Nb oxides and aluminides. The properties for niobium oxides and aluminides were obtained from local- density-functional-theory (LDFT) calculations. The resultant potential was tested in simulations for the Nb(111)/α -alumina(0001) interface. MEAM predictions of the work of separation and the interlayer relaxations for two interface terminations are in excellent agreement with LDFT calculations. The MEAM potential therefore appears suitable for large-scale computer simulation of oxide-metal interface properties.

Reihe: Materials Research Society: Fall Meeting 2000. - Warendale, PA: MRS, 2001.- (MRS proceedings ; 654).- S. AA4.3.2
Band: 654
Ort: Warendale, PA
Verlag: MRS
Fachbereich(e)/-gebiet(e): Fachbereich Material- und Geowissenschaften > Materialwissenschaften > Materialmodellierung
Fachbereich Material- und Geowissenschaften > Materialwissenschaften
Fachbereich Material- und Geowissenschaften
Veranstaltungstitel: 2000 MRS Fall Meeting
Hinterlegungsdatum: 20 Nov 2008 08:25
Offizielle URL: http://dx.doi.org/10.1557/PROC-654-AA4.3.1
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