High Strength Si‐O‐C Ceramic Foams for the Reinforcement of Mg‐Alloys

Zeschky, J.; Höfner, Thomas; Lo, Jason; Scheffler, Michael; Greil, Peter

doi:10.1002/3527603565.ch59

Cited by 2 publications

(1 citation statement)

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“…Industrial plasters contain additives such as cristobalite, quartz or wollastonite, which can react exothermically with molten magnesium alloys. As mentioned earlier, magnesium combines with silica to produce magnesium oxide, magnesium silicide and silicon [19][20][21] 2Mg (l) zSiO 2(s) ?2MgO (s) zSi (s) (4a)…”

Section: Additivesmentioning

confidence: 99%

Interfacial reactions between AZ91D magnesium alloy and plaster mould material during investment casting

Sin¹,

Dubé²,

Tremblay³

2006

Materials Science and Technology

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Reactions at the mould/metal interface play an important role in determining the quality of investment castings. They are particularly critical in the case of magnesium alloys cast in industrial plaster moulds. In this work, reactions of molten magnesium alloy with plaster mould were studied. First the potential interactions with mould materials (including gases) were examined using thermodynamic considerations. Then thin sheets of AZ91D magnesium alloy were cast in industrial plaster moulds using vacuum assistance: the surface of sheets and plaster mould were characterised. The analysis of reaction products indicates that magnesium vapours diffuse through the plaster and reduce the silica present in the investment material according to the following reaction: 4MgzSiO 2 52MgOzMg 2 Si. The extent of reactions is controlled by mould temperature and thickness of castings.

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Section: Additivesmentioning

confidence: 99%

Interfacial reactions between AZ91D magnesium alloy and plaster mould material during investment casting

Sin¹,

Dubé²,

Tremblay³

2006

Materials Science and Technology

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Development of Investment‐Casting Process of Mg‐Alloys for Aerospace Applications

et al. 2007

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Investment casting offers high‐quality castings with good dimensional accuracy, being therefore suitable for aircraft applications. Since commercial ceramic shells react with Mg melts and appropriate inhibitors being not available, magnesium alloys are not widely used in industrial investment‐casting. In order to overcome this situation and enable the aircraft industry to take advantage of the light‐weight properties of magnesium, the process is analyzed within the European FP6 IDEA project, which aims at developing new high‐strength magnesium casting alloys for aeronautic applications.

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High Strength Si‐O‐C Ceramic Foams for the Reinforcement of Mg‐Alloys

Cited by 2 publications

References 0 publications

Interfacial reactions between AZ91D magnesium alloy and plaster mould material during investment casting

Interfacial reactions between AZ91D magnesium alloy and plaster mould material during investment casting

Development of Investment‐Casting Process of Mg‐Alloys for Aerospace Applications

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