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Mechanical properties of aerogel composites for casting purposes

Ratke, Lorenz and Brück, Sabine (2006) Mechanical properties of aerogel composites for casting purposes. Journal of Materials Science, 41, pp. 1019-1024.

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Official URL: http://springerlink.metapress.com

Abstract

Polymeric aerogels are used in this study to bind foundry sand forming thus a new kind of mould and core material called AeroSand. A core and mould material in general shall be able to withstand all handling stresses in a foundry shop, withstand the thermal and mechanical stresses exerted onto them during casting, but should also easy removable from a casting. Therefore mechanical properties are important besides others and this paper therefore concentrates on bending and compression strength of AeroSands. It is shown that the strength levels obtainable with aerogel binders are comparable to conventional binder systems. One essential advantage of AeroSands, namely the easy core removal, is not payed off by a loss in strength. The mechanical properties can be explained using a simple extension of the Griffith criterion taking into account the microstructure of the sand aerogel composite and the fracture path.

Document Type:Article
Title:Mechanical properties of aerogel composites for casting purposes
Authors:
AuthorsInstitution or Email of Authors
Ratke, LorenzUNSPECIFIED
Brück, SabineUNSPECIFIED
Date:6 March 2006
Journal or Publication Title:Journal of Materials Science
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:41
Page Range:pp. 1019-1024
Status:Published
Keywords:aerogels, aerosands, core materials, mechanical properties, granular composite
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Institute of Space Simulation > Center for Solidification of Undercooled Melts (ZEUS)
Deposited By: Prof. Lorenz Ratke
Deposited On:06 Mar 2006
Last Modified:27 Apr 2009 05:01

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