Advanced Engineering Materials

Cover image for Vol. 13 Issue 6

June, 2011

Volume 13, Issue 6

Pages 455–524, B197–B260

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. (Adv. Eng. Mater. 6/2011)

      Article first published online: 27 MAY 2011 | DOI: 10.1002/adem.201190015

      Thumbnail image of graphical abstract

      The metastable phases (retained austenite, Haägg carbide) disappear from the as-cast Fe—C alloys after long anneal as well as after severe plastic deformation (SPD). The segregation in numerous grain boundaries after SPD consumes the carbon from cementite, and this phase partly disappears too. Further details can be found in the article by Straumal et. al. on page 463.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. (Adv. Eng. Mater. 6/2011)

      Article first published online: 27 MAY 2011 | DOI: 10.1002/adem.201190016

      Thumbnail image of graphical abstract

      The cover shows soda-lime glass powders with a high content of CaO as strong inorganic biocide agents. Further details can be found in the article by Moya et al. on page B256.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. (Adv. Eng. Mater. 6/2011) (pages 455–459)

      Article first published online: 27 MAY 2011 | DOI: 10.1002/adem.201190014

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. Structure and Properties of Nanograined Fe–C Alloys after Severe Plastic Deformation (pages 463–469)

      Boris B. Straumal, Sergei V. Dobatkin, Alexei O. Rodin, Svetlana G. Protasova, Andrei A. Mazilkin, Dagmar Goll and Brigitte Baretzky

      Article first published online: 10 MAR 2011 | DOI: 10.1002/adem.201000312

      Thumbnail image of graphical abstract

      After severe plastic deformation (SPD) of Fe–C alloys, the metastable phases disappear (like after very long annealing – see picture). On the other hand, SPD simultaneously leads to the grain refinement into nanometer range. The amount of cementite decreases after SPD. This is because the carbon needed for the formation of bulk cementite is consumed by the grain boundary segregation layers in the nanograined Fe–C alloys.

    2. Formation of Ultrafine-Grained Microstructure of Ti–6Al–4V Alloy by Hot Deformation of α′ Martensite Starting Microstructure (pages 470–474)

      Hiroaki Matsumoto, Sang-Hak Lee, Yoshiki Ono, Yunping Li and Akihiko Chiba

      Article first published online: 16 MAR 2011 | DOI: 10.1002/adem.201000317

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      We have presented a formation of ultrafine-grained microstructure (dα ≈ 0.2 µm) of industrial Ti–6Al–4V alloy produced by the hot compression of a sample with the acicular α′ martensite starting microstructure. The phase transformation of α′/(α+β) during hot working enhanced the microstructural conversion, especially under the conditions of a low temperature and a high-strain rate.

    3. Interdiffusion in Fe/Pt Multilayers: In Situ High Temperature Synchrotron Radiation Reflectivity Study (pages 475–479)

      Nikolay Zotov, Jürgen Feydt, Alan Savan, Alfred Ludwig and Johannes von Borany

      Article first published online: 10 MAR 2011 | DOI: 10.1002/adem.201000358

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      Fe/Pt multilayers have been studied by different X-ray reflectivity techniques. The variation of the lateral correlation length, the vertical roughness, and the interdiffusion coefficient of themultilayers with annealing temperature show that the multilayres transform in two steps with a cross-over temperatureof about 515K.

    4. Phase Composition of Mg-PSZ in Manganese Alloyed TRIP-Steel MMC Processed via Steel Casting and Conductive Sintering (pages 480–486)

      Wolfgang Schärfl, Harry Berek, Christos G. Aneziris, Marco Weider and Anna Yanina

      Article first published online: 24 MAR 2011 | DOI: 10.1002/adem.201000373

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      Metal matrix composites (MMC) containing TRIP-steel/Mg-PSZ were processed by steel casting and conductive sintering. Depending on the processing route the different phase composition of MgO partially stabilized zirconia (Mg-PSZ) was investigated. The interactions between the alloying metals of austenitic stainless steel and the ceramic stabilizer (MgO) during processing lead to a significant change in the phase composition of the Mg-PSZ.

    5. Original Supercritical Water Device for Continuous Production of Nanopowders (pages 487–493)

      Frédéric Demoisson, Moustapha Ariane, Romain Piolet and Frédéric Bernard

      Article first published online: 11 APR 2011 | DOI: 10.1002/adem.201000333

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      This environmentally friendly continuous process allows the rapid synthesis of nanosized metallic oxides under supercritical water (SCW) conditions (T>647K and P>22.1MPa) with a production rate exceeding 10g·h−1. Well-crystallized ZnO, ZrO2, TiO2, CeO2, Y2O3 and La2O3 nanoparticles are sucessfully prepared in one step or just after calcination. This paper suggests also some mechanisms of nano-oxide particle formation in SCW.

    6. Preceramic Paper Derived Alumina/Zirconia Ceramics (pages 494–501)

      Björn Gutbrod, Daniel Haas, Nahum Travitzky and Peter Greil

      Article first published online: 17 MAR 2011 | DOI: 10.1002/adem.201100017

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      Preceramic paper offers a novel approach for manufacturing of lightweight ceramic structures applying versatile paper shaping technologies. Substitution of bioorganic pulp fibers in alumina loaded preceramic paper by inorganic short zirconia fibers is investigated. Powder packing density in the paper sheets and properties of thereof derived ceramics are highly dependent on the degree of pulp fiber substitution and applied post-pressing conditions.

    7. Free-Standing Patterned Ceramic Structures Obtained by Soft Micromolding (pages 502–508)

      Sascha Seils, Raschid Baraki, Christine Jamin and Olivier Guillon

      Article first published online: 11 APR 2011 | DOI: 10.1002/adem.201100013

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      Numerous applications such as Micro-electromechanical systems (MEMS), microfluidic devices or high temperature electronic components require complex shaping of ceramic structures at the micrometric scale. Micromolding in capillaries (MIMIC) is a versatile film deposition technique that can be adapted to easily manufacture free-standing or substrate-bound structures.

  5. Research News

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. Porous Titanium Coatings Through Electrophoretic Deposition of TiH2 Suspensions (pages 509–515)

      Annabel Braem, Tina Mattheys, Bram Neirinck, Jan Schrooten, Omer Van der Biest and Jef Vleugels

      Article first published online: 24 MAR 2011 | DOI: 10.1002/adem.201100011

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      The potential of a new powder metallurgical processing route to apply porous pure Ti coatings on Ti-based implants was investigated. EPD of TiH2 powders followed by dehydrogenation and sintering in vacuum allowed applying a Ti coating with controlled porosity on for example the endossal part of a dental implant. The pore morphology, surface roughness, and bond strength of the coatings were characterized.

    2. A Combinatorial Library of Micro-Topographies and Chemical Compositions for Tailored Surface Wettability (pages 516–524)

      Kristian Kolind, Dines Tilsted Bennetsen, Ayyoob Arpanaie, Mogens Duch, Jette Lovmand, Flemming Besenbacher, Peter Kingshott and Morten Foss

      Article first published online: 17 MAR 2011 | DOI: 10.1002/adem.201000318

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      A novel screening platform including surface modification of topography and chemistry has been used to achieve a range of wettabilities (contact angles). By performing chemical modifications with 1H, 1H, 2H, 2H perfluoroethyltriethoxy-silane (PFS) and n-octadecyltriethoxysilane (ODS) on standard silicon wafers it is possible to include both superhydrophobic and very hydrophilic pad arrays.

  6. Invited Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. Nanobiomaterials: State of the Art and Future Trends (pages B197–B217)

      Lei Yang, Lijuan Zhang and Thomas J. Webster

      Article first published online: 5 APR 2011 | DOI: 10.1002/adem.201080140

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      This schematic depicts how nanostructured materials are being used to control initial protein interactions that mediate cell functions. This review article summarizes current information on how nanomaterials are being used throughout medicine.

  7. Research Articles

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. Liquefied Capsules Coated with Multilayered Polyelectrolyte Films for Cell Immobilization (pages B218–B224)

      Nazua L. Costa, Praveen Sher and João F. Mano

      Article first published online: 25 MAR 2011 | DOI: 10.1002/adem.201080138

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      A layer-by-layer process using alginate and chitosan is used to coat calcium alginate beads containing human osteoblast-like cells (SaOs-2), followed by core liquefaction. All of the capsules exhibit a spherical shape, smooth surface and liquid-core characteristics. Cells remains viable for 3 d after the encapsulation procedure, suggesting diffusion of nutrients and metabolites from the semipermeable, nanostructured membrane.

    2. Purification of Nano-Porous Silicon for Biomedical Applications (pages B225–B233)

      Svetoslav Koynov, Rui N. Pereira, Ivo Crnolatac, Dmitry Kovalev, Ann Huygens, Vladimir Chirvony, Martin Stutzmann and Peter de Witte

      Article first published online: 16 MAR 2011 | DOI: 10.1002/adem.201080091

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      Photoactive nano-porous silicon particles (np-Si) contain considerable amounts of toxic residua from their fabrication by chemical (electrochemical) etching of silicon. These impurities are hazardous for bio-medical applications of np-Si, such as O2-photosensitization in photodynamic therapy and drug delivery. A purification procedure is developed, capable of reducing the concentration of residual impurities to levels acceptable for bio-medical applications, while preserving a desired biological photo-activity of the particles.

    3. Enhanced Fibroblasts Functions in a New Family of Hierarchically Organized Nanohybrid Elastomers (pages B234–B245)

      Jinesh Shah, Bhupendra Girase and R. Devesh K. Misra

      Article first published online: 7 MAR 2011 | DOI: 10.1002/adem.201080130

      Thumbnail image of graphical abstract

      Fibronection expression (green) and cell nuclei (blue) illustrating a network distribution with proliferated cells present as clusters with high fluorescence intensity on silicone-titania hybrid network structure elastomer surface.

    4. The Significance of Gelatin in Calcium Phosphate Hybrid Bone Cement for Attachment and Differentiation of MG63 Cells (pages B246–B255)

      Shinn-Jyh Ding and Ming-You Shie

      Article first published online: 7 MAR 2011 | DOI: 10.1002/adem.201080132

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      The aim of this study is to examine the effect of gelatin (2, 5, and 10 wt%) on the biological functions of MG63 osteoblast-like cells cultured on the calcium phosphate hybrid bone cement. There is a linear increase in the expression of activated focal adhesion kinase (pFAK) and total integrin with increasing gelatin content in the cements after 3h of incubation. Gelatin aids cell attachment and triggers more-rapid integrin and pFAK secretions, compared to the CPC control without gelatin.

  8. Rapid Communication

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Research News
    7. Invited Review
    8. Research Articles
    9. Rapid Communication
    1. Glass Powders with a High Content of Calcium Oxide: A Step Towards a “Green” Universal Biocide (pages B256–B260)

      José S. Moya, Leticia Esteban-Tejeda, Carlos Pecharromán, Sonia R.H. Mello-Castanho, Antonio C. da Silva and Francisco Malpartida

      Article first published online: 24 MAY 2011 | DOI: 10.1002/adem.201080133

      Thumbnail image of graphical abstract

      Soda-lime glass powders (d<100µm) with a content of CaO ranging 15 to 20 wt-% are shown to be strong inorganic biocide agents, with a logarithm of reduction >4, against Gram-positive and -negative bacteria and yeasts. The method of biocidal action is investigated. First, glass particles attach to the cell membrane (see image). Then, Ca2+ lixiviated from the glass particles surface brings about membrane depolarization and subsequent death of the cells.

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