Juslin, N. ; Erhart, P. ; Traskelin, P. ; Nord, J. ; Henriksson, K. O. E. ; Nordlund, K. ; Salonen, E. ; Albe, K. (2005)
Analytical interatomic potential for modeling nonequilibrium processes in the W-C-H system.
In: J. Appl. Phys., 98 (12)
doi: 10.1063/1.2149492
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A reactive interatomic potential based on an analytical bond-order scheme is developed for the ternary system W-C-H. The model combines Brenner's hydrocarbon potential with parameter sets for W-W, W-C, and W-H interactions and is adjusted to materials properties of reference structures with different local atomic coordinations including tungsten carbide, W-H molecules, as well as H dissolved in bulk W. The potential has been tested in various scenarios, such as surface, defect, and melting properties, none of which were considered in the fitting. The intended area of application is simulations of hydrogen and hydrocarbon interactions with tungsten, which have a crucial role in fusion reactor plasma-wall interactions. Furthermore, this study shows that the angular-dependent bond-order scheme can be extended to second nearest-neighbor interactions, which are relevant in body-centered-cubic metals. Moreover, it provides a possibly general route for modeling metal carbides. (c) American Institute of Physics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2005 |
| Autor(en): | Juslin, N. ; Erhart, P. ; Traskelin, P. ; Nord, J. ; Henriksson, K. O. E. ; Nordlund, K. ; Salonen, E. ; Albe, K. |
| Art des Eintrags: | Bibliographie |
| Titel: | Analytical interatomic potential for modeling nonequilibrium processes in the W-C-H system |
| Sprache: | Englisch |
| Publikationsjahr: | Dezember 2005 |
| Verlag: | American Institute of Physics |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | J. Appl. Phys. |
| Jahrgang/Volume einer Zeitschrift: | 98 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1063/1.2149492 |
| URL / URN: | http://jap.aip.org/resource/1/japiau/v98/i12/p123520_s1 |
| Kurzbeschreibung (Abstract): | A reactive interatomic potential based on an analytical bond-order scheme is developed for the ternary system W-C-H. The model combines Brenner's hydrocarbon potential with parameter sets for W-W, W-C, and W-H interactions and is adjusted to materials properties of reference structures with different local atomic coordinations including tungsten carbide, W-H molecules, as well as H dissolved in bulk W. The potential has been tested in various scenarios, such as surface, defect, and melting properties, none of which were considered in the fitting. The intended area of application is simulations of hydrogen and hydrocarbon interactions with tungsten, which have a crucial role in fusion reactor plasma-wall interactions. Furthermore, this study shows that the angular-dependent bond-order scheme can be extended to second nearest-neighbor interactions, which are relevant in body-centered-cubic metals. Moreover, it provides a possibly general route for modeling metal carbides. (c) American Institute of Physics. |
| Freie Schlagworte: | tungsten compounds, potential energy functions, bonds (chemical), crystal defects, melting, crystal structure |
| Zusätzliche Informationen: | SFB 595 C2 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialmodellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung > Teilprojekt C2: Atomistische Computersimulationen von Defekten und deren Bewegung in Metalloxiden DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung > C - Modellierung DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche > SFB 595: Elektrische Ermüdung Zentrale Einrichtungen DFG-Sonderforschungsbereiche (inkl. Transregio) > Sonderforschungsbereiche DFG-Sonderforschungsbereiche (inkl. Transregio) |
| Hinterlegungsdatum: | 28 Feb 2012 14:16 |
| Letzte Änderung: | 25 Apr 2016 08:34 |
| PPN: | |
| Sponsoren: | The research was supported by Association EURATOM/ TEKES under the FUSION programme., This joint study was made possible by the support of the Academy of Finland �Project No. 204461� and the German foreign exchange service �DAAD� through a bilateral travel program, and was also partly supported by Academy of Finland under Project No.205729 |
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