Metal foam stabilization by oxide network particles

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Körner C, Arnold M, Singer R
Zeitschrift: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Jahr der Veröffentlichung: 2005
Band: 396
Seitenbereich: 28-40
ISSN: 0921-5093
Sprache: Englisch


Abstract


The fundamental stabilization mechanism for foaming metal powder compacts (PM foams) is investigated. It is shown that PM foams belong to the class of stable foams where the stability is controlled by the balance of interfacial forces which equilibrate after drainage has been completed. The origin of these interfacial forces is traced back to the oxide content of the underlying metal powder. The oxides are not present as compact particles but form crumpled, voluminous aggregates, the oxide network particles, which form a tenuous global network. The effective volume fraction of these network particles is about 30-35%. Analogous to a gel-sol transition, bubble nucleation leads to a fragmentation of the global oxide network structure. The isolated oxide network fragments have particle character and act as mechanical barriers within the foam structure where they induce a strong stabilizing disjoining pressure. © 2005 Elsevier B.V. All rights reserved.



FAU-Autoren / FAU-Herausgeber

Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Singer, Robert Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Zitierweisen

APA:
Körner, C., Arnold, M., & Singer, R. (2005). Metal foam stabilization by oxide network particles. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 396, 28-40. https://dx.doi.org/10.1016/j.msea.2005.01.001

MLA:
Körner, Carolin, Michael Arnold, and Robert Singer. "Metal foam stabilization by oxide network particles." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 396 (2005): 28-40.

BibTeX: 

Zuletzt aktualisiert 2018-11-08 um 01:29