Structure and distribution of oxides in aluminium foam

被引：52

作者：

Dudka, Alexander ^{[2
,3
]}

Garcia-Moreno, Francisco ^{[1
,3
]}

Wanderka, Nelia ^{[3
]}

Banhart, John ^{[1
,3
]}

机构：

[1] Tech Univ Berlin, D-10623 Berlin, Germany

[2] Natl Tech Univ Ukraine, Kiev Polytech Inst, UA-03056 Kiev, Ukraine

[3] Hahn Meitner Inst Berlin GmbH, Helmholtz Ctr Berlin Mat & Energy, D-14109 Berlin, Germany

来源：

ACTA MATERIALIA | 2008年 / 56卷 / 15期

关键词：

aluminium foam; oxide; radioscopy; tomography; TEM;

D O I：

10.1016/j.actamat.2008.04.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Foaming of aluminium is investigated under oxidizing and non-oxidizing gas atmospheres. Foams were prepared by mixing and pressing A199.95 and TiH2 powders and foaming the pressed material in a gas-tight X-ray transparent furnace while following the process by X-ray radioscopy. The structure and distribution of the oxides present in the powders, precursors and foams were studied by light microscopy, scanning and transmission electron microscopy. Sequential focused ion beam slicing was used to obtain tomographic images of oxides and micropore distributions within the individual cell walls of the foams. A complex hierarchical structure of the oxides is found. Oxides reside in the bulk of the cell walls without a pronounced segregation to the gas/metal interfaces. The presence of air retards foaming due to oxidation of the outer surface. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：3990 / 4001

页数：12

共 28 条

[1]

[Anonymous], 2000, METAL FOAMS A DESIGN

[2] Effect of powder oxide content on the expansion and stability of PM-route Al foams [J].

Asavavisithchai, S. ;

Kennedy, A. R. .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 297 (02) :715-723

[3] The role of oxidation during compaction on the expansion and stability of a foams made via a PM route [J].

Asavavisithchai, Seksak ;

Kennedy, Andrew R. .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (06) :568-572

[4] Manufacturing routes for metallic foams [J].

Banhart, J .

JOM-JOURNAL OF THE MINERALS METALS & MATERIALS SOCIETY, 2000, 52 (12) :22-27

[5] Manufacture, characterisation and application of cellular metals and metal foams [J].

Banhart, J .

PROGRESS IN MATERIALS SCIENCE, 2001, 46 (06) :559-U3

[6] Metal foam evolution studied by synchrotron radioscopy [J].

Banhart, J ;

Stanzick, H ;

Helfen, L ;

Baumbach, T .

APPLIED PHYSICS LETTERS, 2001, 78 (08) :1152-1154

[7] Metal foams: Production and stability [J].

Banhart, John .

ADVANCED ENGINEERING MATERIALS, 2006, 8 (09) :781-794

[8]

Bohme G., 1987, NONNEWTONIAN FLUID M

[9] A study of aluminium foam formation - Kinetics and microstructure [J].

Duarte, I ;

Banhart, J .

ACTA MATERIALIA, 2000, 48 (09) :2349-2362

[10]

FRETI S, 1982, LIGHT METAL AGE JUN, P12

← 1 2 3 →