2002
DOI: 10.1002/1527-2648(20021014)4:10<735::aid-adem735>3.0.co;2-y
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Development of a Foaming Process for Particulate Reinforced Aluminum Melts

Abstract: This paper reports on investigations by Hütte Klein‐Reichenbach and LKR in the course of the development of a new processing technique for cellular aluminum, to produce net shape parts of foamed aluminum via the melt route by gas injection. The foaming depends on the interaction between the blowing gas, the ceramic particles, and the melt. The stabilization of the foam by different particle contents in interaction with air, oxygen and nitrogen as blowing gas has been investigated for some matrix alloys with re… Show more

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Cited by 100 publications
(72 citation statements)
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“…8) Former phenomenon is currently associated with an additional stabilisation effect of oxide skin formed on surface of cell faces via the reaction of liquid Al with oxidizing CO 2 gas. 5,6,[8][9][10][11][12][13] Although the results related to in situ monitoring of foam formation from powder compacts being produced with TiH 2 foaming agent have been published, [14][15][16][17][18][19][20][21] formation of foams created from powder compacts with CaCO 3 as gas source has not yet been systematically assessed by in situ experiments. 22) The present paper is aimed at in situ analysis of foam formation and stability at heating Al-based powder compacts with CaCO 3 by comparison with those prepared with TiH 2 .…”
Section: Introductionmentioning
confidence: 99%
“…8) Former phenomenon is currently associated with an additional stabilisation effect of oxide skin formed on surface of cell faces via the reaction of liquid Al with oxidizing CO 2 gas. 5,6,[8][9][10][11][12][13] Although the results related to in situ monitoring of foam formation from powder compacts being produced with TiH 2 foaming agent have been published, [14][15][16][17][18][19][20][21] formation of foams created from powder compacts with CaCO 3 as gas source has not yet been systematically assessed by in situ experiments. 22) The present paper is aimed at in situ analysis of foam formation and stability at heating Al-based powder compacts with CaCO 3 by comparison with those prepared with TiH 2 .…”
Section: Introductionmentioning
confidence: 99%
“…Aún así, los MC son materiales que no han alcanzado un total nivel de desarrollo y, mucho menos, de explotación debido, principalmente, a una serie de problemas que aun existen en la mayoría de los procesos de producción, y que están relacionados con los costos de producción, control del proceso y calidad de las espumas [9] . A pesar de contar con un futuro promisorio, por sus especiales características, todavía hay mucho por hacer con respecto al desarrollo y optimización de estos materiales, de manera que puedan ser más competitivos en términos de costos y prestaciones [10] .…”
Section: R Re Ev VI Is Si Ió óN N 1 1 I In Nt Tr Ro Od Du Uc Cc Ciunclassified
“…es de alrededor de 700 °C [18] , dando lugar a la formación de burbujas que son estabilizadas con la ayuda de las partículas cerámicas que se encuentran homogéne-amente dispersas en el fundido [18 y 30] . Durante el proceso, la espuma generada se acumula en la superficie superior del metal líquido por efecto de su menor densidad; luego, es recogida mediante una correa deslizante que se encarga de transportarla y se somete a enfriamiento [31] .…”
Section: P Pr Ro Od Du Uc CC Ci Ió óN N D De E M Me Et Ta Al Le unclassified
“…Until now, a wide variety of manufacturing methods, such as gas-injection method, 4,5) directional solidification method, 3,6,7) precursor method, [8][9][10] slurry foaming method 11) and so on [12][13][14][15] has been developed. Among them, the slurry foaming method, in which the metal powders with specific particle size are admixed at room temperature with a foaming agent to form foamy slurry, and the green samples are dried and then sintered under controlled atmosphere at high temperature.…”
Section: Introductionmentioning
confidence: 99%