Prethodno priopćenje

Study of process parameters on aluminium foam formation in the Al-6Si-3Mg alloy

J. Juarez-Hernandez ; Facultad de Ingeniería Mecánica y Eléctrica, UANL
R. Benavides-Trevino ; Facultad de Ingeniería Mecánica y Eléctrica, UANL
O. Barceinas-Sanchez ; CICATA-IPN
M. Hernandez-Rodriguez ; Facultad de Ingeniería Mecánica y Eléctrica, UANL
R. Almaguer ; Depto. de Ingeniería Cyber Mayoreo S.A. de C.V. Mexico

Sažetak

The aim of this research was to study the process parameters that promote foam formation by injecting N₂ into Al-6Si-3Mg wt % molten alloy with silicon carbide particles additions (SiC). An experimental design was proposed, in which the contents of SiC particles were 0, 10, 30 and 50 wt %, and the overheating was defined as ΔT= T_F - T_L , where T_L is the liquidus temperature and was determined by the cooling curve method and the foaming temperatures were selected as T_F at 630, 610, 580 and 570 °C. Flow and pressure of air blow were constant, 2,0 lt/min and 4,0 atm, respectively. The foam formation was possible only under two experimental conditions, 10 wt % SiC at ΔT > 12 °C and 30 wt % SiC at ΔT > 10 °C. The foams obtained under these conditions were stable, while with other conditions of experiments, bubble coallesence occurred. Finally, it was concluded that the foam formation occurred by SiC contents lower than 30 wt % SiC and temperatures slightly above the liquidus.

Ključne riječi

Al-Si alloys; injecting N₂; Aluminium foam; solidification

Hrčak ID:

110075

URI

https://hrcak.srce.hr/110075

Datum izdavanja:

1.4.2014.

Posjeta: 948 *