Advanced Engineering Materials

Cover image for Vol. 13 Issue 11

Special Issue: Cellular Materials

November 2011

Volume 13, Issue 11

Pages 975–1071

Issue edited by: Günter Stephani, Michael Scheffler

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Feature Article
    6. Research News
    7. Communication
    8. Research News
    9. Research Article
    10. Research News
    11. Research Article
    12. Communications
    1. Front Cover Advanced Engineering Materials 11/2011

      Volker Presser, Stefanie Schultheiß, Christian Kohler, Christoph Berthold, Klaus G. Nickel, Achim Vohrer, Hermann Finckh and Thomas Stegmaier

      Version of Record online: 28 OCT 2011 | DOI: 10.1002/adem.201190030

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      The cover depicts the microstructure of sea urchin spines (blue and green circle) and biomimetic alumina (violet circle). Computer tomography shows the macroscopic similarity between graded hierarchic porous alumina obtained via slip casting (red) and a pencil sea urchin spine (brown). (Cover art by V. Presser and K. Jost). Further details can be found in the article by Presser et al. on page 1042.

  2. Contents

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Feature Article
    6. Research News
    7. Communication
    8. Research News
    9. Research Article
    10. Research News
    11. Research Article
    12. Communications
    1. (Adv. Eng. Mater. 11/2011) (pages 975–979)

      Version of Record online: 28 OCT 2011 | DOI: 10.1002/adem.201190029

  3. Editorial

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Feature Article
    6. Research News
    7. Communication
    8. Research News
    9. Research Article
    10. Research News
    11. Research Article
    12. Communications
    1. Editorial (page 981)

      Günter Stephani and Michael Scheffler

      Version of Record online: 19 AUG 2011 | DOI: 10.1002/adem.201100161

  4. Feature Article

    1. Top of page
    2. Cover Picture
    3. Contents
    4. Editorial
    5. Feature Article
    6. Research News
    7. Communication
    8. Research News
    9. Research Article
    10. Research News
    11. Research Article
    12. Communications
    1. Reinforced Cellular Carbon Matrix–MgO Composites for High Temperature Applications: Microstructural Aspects and Colloidal Processing (pages 982–989)

      Wagner da Silveira and Guido Falk

      Version of Record online: 27 MAY 2011 | DOI: 10.1002/adem.201100028

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      Novel MgO–C materials consisting of open porous cellular glassy carbon/YSZ/SiC layered structures and high-melting-point component periclase infiltrated into the polyhedral network were produced to achieve reinforcement and advanced oxidation resistance of the carbon structure. A processing concept based on replica templating, deposition of functional coatings and subsequent co-sintering of functionalized MgO–C–SiC and MgO–C–YSZ materials is proposed.

  5. Research News

    1. Top of page
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    3. Contents
    4. Editorial
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    7. Communication
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    11. Research Article
    12. Communications
    1. Predicting the Specific Surface Area and Pressure Drop of Reticulated Ceramic Foams Used as Catalyst Support (pages 990–995)

      Amer Inayat, Hannsjörg Freund, Andreas Schwab, Thomas Zeiser and Wilhelm Schwieger

      Version of Record online: 21 APR 2011 | DOI: 10.1002/adem.201100038

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      The accurate knowledge of the specific surface area and the pressure drop is a prerequisite for the reliable design of reactors with solid foam structures as internals. A new correlation based on the tetrakaidecahedron geometry is proposed for the prediction of the pressure drop in reticulated ceramic foams using their predicted specific surface area. The validity of the correlation is demonstrated by experimental data of the reticulated ceramic foams of different PPI, porosity, and material.

  6. Communication

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    3. Contents
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    6. Research News
    7. Communication
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    10. Research News
    11. Research Article
    12. Communications
    1. Novel-Type Inorganic Foams from Preceramic Polymers with Embedded Titania Nanoparticles for Photo-Catalytic Applications (pages 996–1001)

      Sarama Bhattacharjee, Pratik Ranjan Das, Christiane Ohl, Viola Wilker, Mathias Kappa, Franziska Scheffler and Michael Scheffler

      Version of Record online: 6 MAY 2011 | DOI: 10.1002/adem.201100025

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      A novel type of inorganic foam-supported photocatalyst was developed based on a self-foaming preceramic polymer. The approach combines foaming of a polysilsesquioxane preceramic polymer in the presence of titania (TiO2) nanoparticles and subsequent annealing. Anatase-to-rutile transformation is prevented by TiOSi bond formation between nano-TiO2 and the former silicone, and a high catalytic activity was found in methylene blue decomposition under UV irradiation.

  7. Research News

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    3. Contents
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    7. Communication
    8. Research News
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    12. Communications
    1. Bone Engineering with Porous Ceramics and Metals (pages 1002–1007)

      Jan Luyten, Ivo Thijs, Matthieu Ravelingien and Steven Mullens

      Version of Record online: 5 SEP 2011 | DOI: 10.1002/adem.201100016

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      The production of porous titanium (alloy) and calcium phosphate materials is evaluated with regard to the requirements posed onto bone scaffolds by comparing 3 manufacturing routes. To enhance the bioactivity of metallic scaffolds and to serve as a drug delivery system, some surface modification technologies are applied, by which a variety of calcium phosphate layers can be deposited.

    2. Cellular Ceramics in Combustion Environments (pages 1008–1014)

      Alexander Füssel, Daniela Böttge, Jörg Adler, Felix Marschallek and Alexander Michaelis

      Version of Record online: 21 JUL 2011 | DOI: 10.1002/adem.201100020

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      Combustion inside a porous media is related to high requirements on the thermal shock, and temperature corrosion resistance of the cellular material. Examples of applications, an overview of possible high-temperature materials and results in the development of improved cellular ceramics are presented.

  8. Research Article

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    12. Communications
    1. Vibro-Acoustic Simulation of Aluminium Foam Parts Using MultiScale Techniques (pages 1015–1018)

      Lukasz Karas, Karoly Jalics and Hans-Herwig Priebsch

      Version of Record online: 19 AUG 2011 | DOI: 10.1002/adem.201100021

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      A special approach is required when applying finite elements methods for vibro-acoustic analysis (natural and force vibrations, mode shapes) of inhomogeneous cellular metals. The main challenge is to map the material inhomogeneous microstructure information to the vibro-acoustic simulation model with acceptable efficiency. Multiscale technique with representative volume elements for this purpose was used. The simulation results show a good agreement (to within 5%) with experimental values.

  9. Research News

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    1. Metal Foam – Bone Cement Composites: Mechanical and Biological Properties and Perspectives for Bone Implant Design (pages 1019–1023)

      Stefan Glorius, Berthold Nies, Jana Farack, Peter Quadbeck, Ralf Hauser, Gisela Standke, Sophie Rößler, Dieter Scharnweber and Günter Stephani

      Version of Record online: 26 JUL 2011 | DOI: 10.1002/adem.201100026

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      Metal foam–bone cement composites are developed with superior mechanical properties. These are considered candidates as implant materials for load-bearing bone defects. By using resorbable mineral bone cement in combination with degradable metals (here iron), we propose a novel, biodegradable material with gradual reduction of its mechanical strength. Furthermore, iron corrosion could be controlled by a new type of bioactive coating.

  10. Research Article

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    12. Communications
    1. Structural and Material Design of Open-Cell Powder Metallurgical Foams (pages 1024–1030)

      Peter Quadbeck, Kerstin Kümmel, Ralf Hauser, Gisela Standke, Jörg Adler, Günter Stephani and Bernd Kieback

      Version of Record online: 11 JUL 2011 | DOI: 10.1002/adem.201100023

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      Open-cell metal foams have been manufactured by a powder metallurgical replication technique. Thus, highly porous components from several steels, titanium alloys, and also molybdenum have been produced. This paper shows how the mechanical and physical properties of such replicated polyurethane based metal foams may be adapted to various applications.

  11. Communications

    1. Top of page
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    3. Contents
    4. Editorial
    5. Feature Article
    6. Research News
    7. Communication
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    1. Hybrid Foams – A New Approach for Multifunctional Applications (pages 1031–1036)

      Matthias Reinfried, Günter Stephani, Fabian Luthardt, Jörg Adler, Marianne John and Andreas Krombholz

      Version of Record online: 5 OCT 2011 | DOI: 10.1002/adem.201100018

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      Hybrid foams consist of two, different, interpenetrating or particulate-embedded foam-material classes. Thus, they can intrinsically unify the advantages of the different materials. Enhanced multifunctionality is another consequent result of the hybrid-foam approach. This paper illustrates the concept of hybrid foams for two selected examples with promising properties. There is an improvement in the deformation of the metal-polymer hybrid foam and the deformation changes from brittle to ductile for the metal-ceramic hybrid foam. The damping and the Young's modulus in the metal-ceramic hybrid foam are also enhanced.

    2. Investigation of Stress Induced Phase Transformation in TRIP-Steel/Mg-PSZ Composites Using EBSD (pages 1037–1041)

      Harry Berek, Christos Georgios Aneziris, Manuel Hasterok, Horst Biermann, Steffen Wolf and Lutz Krüger

      Version of Record online: 18 JUL 2011 | DOI: 10.1002/adem.201100014

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      Open cell foam structures were produced. They contain 95 vol% TRIP-steel (transformation induced plasticity) and 5 vol% zirconia. The goal was to show the effect of transformation toughening within the zirconia particles embedded in the steel matrix during compressive deformation. Deformation induced phase transformation could be shown by using EBSD in combination with EDX.

    3. Lessons from Nature for the Construction of Ceramic Cellular Materials for Superior Energy Absorption (pages 1042–1049)

      Volker Presser, Stefanie Schultheiß, Christian Kohler, Christoph Berthold, Klaus G. Nickel, Achim Vohrer, Hermann Finckh and Thomas Stegmaier

      Version of Record online: 20 JUN 2011 | DOI: 10.1002/adem.201100066

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      Spines of lance and pencil sea urchins are optimized to combine mechanical stability and lightweight construction. Layered porous ceramics mimicking the design and architecture of sea urchin spines show improved ability to absorb and dissipate compressive loads and impact energies. This can be realized by simply designing and tuning the pore distribution and 3D arrangement without changing the material or introducing a secondary phase. The 3D laminate structure of sea urchin spines and biomimetic ceramics is the reason for a cascading graceful failure behavior which remains a high level of the initial compressive strength.

    4. Aluminum Integral Foams with Near-Microcellular Structure (pages 1050–1055)

      Johannes Hartmann, André Trepper and Carolin Körner

      Version of Record online: 20 JUN 2011 | DOI: 10.1002/adem.201100035

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      Near-microcellular aluminum foams with a gradual transition between an integral solid skin and a cellular core are produced by integral foam moulding (IFM) using magnesium hydride powder as blowing agent. There is a direct correlation between amount and size distribution of blowing agent particles and resulting pore size distribution. The use of a high amount of blowing agent particles with narrow size distribution allows the production of fine-cellular and homogeneous foams.

    5. Analysis of Cellular Metals as Energy-Absorbing Elements in Car Seats (pages 1056–1059)

      Srecko Nesic, Peter Schäffler, Klaus Unruh, Wilhelm Michels and Ulrich Krupp

      Version of Record online: 13 MAY 2011 | DOI: 10.1002/adem.201100046

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      The safety of car passengers can be increased by the use of cellular metals in structural components due to their high energy-absorption ability. By the implementation of metalfoams or metalfoam-sandwich structures as car seat components the existing safety relevant components can be supported. First results of mechanical tests reveal the high potential of the different metalfoam products, although these have to be optimized for the application in car seats.

    6. Preparation of Optically Transparent Open-Celled Foams and its Morphological Characterization Employing Volume Image Analysis (pages 1060–1065)

      Ethel C. Bucharsky, Karl G. Schell, Peter Habisreuther, Rainer Oberacker, Nikolaos Zarzalis and Michael J. Hoffmann

      Version of Record online: 21 JUL 2011 | DOI: 10.1002/adem.201100024

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      Transparent glass sponges can potentially be used for effective light dispersion in photobioreactors. In this work, such open-celled sponges are prepared by the polymer replica technique employing polyurethane sponges as templates and nanoscaled SiO2 powders. Topics such as slurry stabilization, temperature for burning-out the polymer, and subsequent sintering of the remaining SiO2 structure to transparent cellular bodies are discussed.

    7. Parts Containing Open-Celled Metal Foam Manufactured by the Foundry Route: Processes, Performances, and Applications (pages 1066–1071)

      Jonathan Dairon, Yves Gaillard, Jean.-Charles Tissier, David Balloy and Gérard Degallaix

      Version of Record online: 31 MAY 2011 | DOI: 10.1002/adem.201100022

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      Casting techniques have been developed for manufacturing functional parts containing stochastic or regular open-celled metal foam. These techniques, of which a particularity is to provide foamed parts with solid skins, are presented. Behavior of both kinds of cast foams in energy absorption and thermal management is also discussed.

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