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Metals 2014, 4(1), 1-7; doi:10.3390/met4010001

A Concept for the Control of Pore Size in Superalloy Membranes

* ,
Institut für Werkstoffe, Technische Universität Braunschweig, Langer Kamp 8, D-38106 Braunschweig, Germany
* Author to whom correspondence should be addressed.
Received: 29 November 2013 / Revised: 19 December 2013 / Accepted: 23 December 2013 / Published: 9 January 2014
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A new method to adjust the pore size in superalloy membranes is shown, utilizing controlled cooling from solution heat treatment of the solid superalloy. Hereby, the nucleation rate and, thus, the size of the γ'-precipitates can be varied to a large extent. This leads to a corresponding variation in the pore size once the membrane material is produced by directional coarsening of the γ'-phase to an interconnected network and subsequent selective extraction of the γ-phase. Furthermore, it was found that coherent and incoherent γ'-precipitates can be used alike to fabricate superalloy membranes, and yet, result in vastly different pore morphologies. The findings widen the application range of this novel material class.
Keywords: superalloys; porous materials; nanostructured materials; heat treatment superalloys; porous materials; nanostructured materials; heat treatment
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Rösler, J.; Krause, W.; Hinze, B. A Concept for the Control of Pore Size in Superalloy Membranes. Metals 2014, 4, 1-7.

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