Endogenous particle stabilization during magnesium integral foam production

被引：61

作者：

Körner, C ^{[1
]}

Hirschmann, M ^{[1
]}

Bräutigam, V ^{[1
]}

Singer, RF ^{[1
]}

机构：

[1] Lehrstuhl Werkstoffkunde & Technol Met, Dept Mat Sci, Erlangen, Germany

来源：

ADVANCED ENGINEERING MATERIALS | 2004年 / 6卷 / 06期

关键词：

D O I：

10.1002/adem.200405147

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The production of magnesium integral foam components with a dense shell and a porous core is investigated. High pressure casting methods are used where liquid magnesium mixed with a blowing agent is injected into a permanent steel mould. A compact shell develops due to fast cooling at the walls. Larger cooling times in the core allow the decomposition of the blowing agent and the evolution of a foam structure. The resulting integral foams show a high weight-specific stiffness combined with high energy absorption capability. For the first time, foam stabilizing without additives is realized. Stabilization is by foaming during solidification with the primary alpha-phase particles acting as obstacles slowing down cell wall thinning.

引用

页码：385 / 390

页数：6