Advanced Engineering Materials

Cover image for Vol. 12 Issue 1‐2

February, 2010

Volume 12, Issue 1-2

Pages 3–79, B1–B73

  1. Cover Picture

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Adv. Eng. Mater. 1-2/2010

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.201090000

      Thumbnail image of graphical abstract

      The image shows the microstructure of a thermosensitive chitosan-based hydrogel containing an elastin-like polymer. Hydrogels containing such macromolecules may be interesting as injectable bioactive systems for tissue engineering applications as they can improve the biocompatibility and the mechanical properties of the scaffold.

  2. Inside Front Cover

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Adv. Eng. Mater. 1-2/2010

      Berit Mueller, Martin Zacharias and Kurosch Rezwan

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.201090001

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      The cover shows Interactions of proteins with calcium phosphate particles are highly interesting for a variety of applications and processes in the biomaterials research field, e.g. for the protein directed surface functionalisation of calcium phosphate. The adsorption of two oppositely charged model proteins - bovine serum albumine and lysozyme - was investigated by zeta potential, UV/VIS spectroscopy, and protein charge modelling. The study gives both quantitative data on protein adsorption and insights into the adsorption mechanisms. More details can be found in the article by K. Rezwan et al. on page B 53.

  3. Contents

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Contents: (Adv. Eng. Mater. 1-2/2010) (pages 3–8)

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.201090002

  4. Communications

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Nanoindentation of a Pseudoelastic NiTiFe Shape Memory Alloy (pages 13–19)

      Janine Pfetzing-Micklich, Martin Franz-Xaver Wagner, Robert Zarnetta, Jan Frenzel, Gunther Eggeler, Athina Emmanuel Markaki, Jeff Wheeler and Trevor William Clyne

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200900266

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      The characterization of the local mechanical properties is essential for the use of NiTi shape memory alloys in small-scale applications. We perform nanoindentation on a ternary NiTiFe alloy at various temperatures to characterize the local mechanical behavior and especially small-scale pseudoelasticity of the different phases and phase mixtures. Our results show that plastic deformation strongly limits the pseudoelastic temperature window in nanoindentation experiments.

    2. Constituent Particle Break-Up During Hot Rolling of AA 5182 (pages 20–29)

      Nicolas Moulin, Estelle Parra-Denis, Dominique Jeulin, Christophe Ducottet, Annabelle Bigot, Elodie Boller, Eric Maire, Cécile Barat and Helmut Klöcker

      Article first published online: 17 DEC 2009 | DOI: 10.1002/adem.200900241

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      The break-up of complex shaped inter-metallic iron-rich particles (∼26 000 mm−3) in an aluminum alloy during industrial hot rolling was analyzed. A new segmentation algorithm with multiclass thresholding was developed. The particle break-up was analyzed stastically and by a mechanical FEA-based model. The present work proves the feasibility of a particle classification with a subsequent finite element-based mechanical modeling.

    3. Formation and Stability of Near Convoluted Structure Obtained in the Ti–46Al–8Ta Alloy Via Air Quenching and Ageing (pages 30–34)

      Valery Imayev, Ramil Gaisin, Rainer Wunderlich, Ruslan Valiev and Hans-Jörg Fecht

      Article first published online: 24 NOV 2009 | DOI: 10.1002/adem.200900220

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      Microstructure evolution after air quenching and variable ageing treatment has been investigated in small-sized ingot bars of the Ti-46Al-8Ta alloy. It was found that air quenching and subsequent ageing at 1200…1260 °C led to formation of a homogeneous refined near convoluted microstructure. To increase the stability of the near convoluted structure, very slow cooling after high-temperature ageing and final long-term ageing at around 900 °C can be recommended.

    4. Microstructure Evolution and Mechanical Properties of Linear Friction Welded Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti17) Titanium Alloy Joints (pages 35–43)

      Wen-Ya Li, Tiejun Ma and Siqian Yang

      Article first published online: 4 JAN 2010 | DOI: 10.1002/adem.200900185

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      The microstructure, microhardness, tensile properties and impact toughness of Ti–5Al–2Sn–2Zr–4Mo–4Cr (Ti17) alloy joints welded by linear friction welding (LFW) are investigated. A narrow, sound weld is formed, consisting of a superfine α + β structure in the weld center. The structure gradually changes from the weld center to the parent Ti17 in the thermomechanically affected zone (TMAZ), with the highly deformed α and β phases oriented along the deformation direction, owing to the uneven deformation and temperature distribution. The tensile strengths of the joints are comparable to that of the parent Ti17 but with a much lower plasticity and impact toughness.

    5. Microstructure and Mechanical Properties of New AlCoxCrFeMo0.5Ni High-Entropy Alloys (pages 44–49)

      Chin-You Hsu, Woei-Ren Wang, Wei-Yeh Tang, Swe-Kai Chen and Jien-Wei Yeh

      Article first published online: 27 NOV 2009 | DOI: 10.1002/adem.200900171

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      Effects of Co content on microstructures and hot hardness of a new high-entropy alloy system, AlCoxCrFeMo0.5Ni (x = 0.5 to 2.0, in molar ratio) were investigated. All the AlCoxCrFeMo0.5Ni alloys possess higher hardness level than that of Ni-based superalloys In 718/In 718 H from room temperature to 1273 K, indicating that this alloy system has great potential in high-temperature applications.

    6. Study on Crack-like Pores of Al Foams Made via the Powder-Metallurgy Route (pages 50–53)

      Lei Wang, Guangchun Yao, Yihan Liu and Guoyin Zu

      Article first published online: 24 NOV 2009 | DOI: 10.1002/adem.200900195

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      Stress perpendicular to the compaction direction is caused by the interactions of the Al powder under a high compaction pressure and is the main reason for the formation of crack-like pores in the Al-foaming process. The results of model analysis suggest that the pressure difference, ΔP, between the initial round bubbles and the crack-like pores is the driving force for the disappearance of the crack-like pores. The rapid reduction of ΔP is attributed to the decomposition characteristics of the TiH2 powder.

    7. Two- and Three-Dimensional Micro- and Sub-Micrometer Periodic Structures Using Two-Beam Laser Interference Lithography (pages 54–60)

      A. F. Lasagni and B. S. Menéndez-Ormaza

      Article first published online: 27 NOV 2009 | DOI: 10.1002/adem.200900221

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      A method for the fabrication of two and three dimensional structures based on interference lithography is introduced. The advantages of using two irradiation steps as well as the structure stability are discussed together with numerical calculations. A biomimmetic example is described as well as fabrication of sub-micrometer canals using a simple approach.

    8. Micrometer-Sized Specimen Preparation Based on Ion Slicing Technique (pages 61–64)

      Stefan Wurster, Christian Motz, Monika Jenko and Reinhard Pippan

      Article first published online: 17 DEC 2009 | DOI: 10.1002/adem.200900263

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      Applying the ion slicing technique prior to focused ion beam milling allows us to produce many microscopic samples of different kinds, e.g., notched cantilevers or tensile specimens, on one macroscopic specimen. Manufacturing of samples is easier and quicker, but the biggest advantage is the fact that all samples feature the same crystallography, which makes experiments much more comparable.

    9. Lightweight Porcelain Stoneware by Engineered CeO2 Addition (pages 65–70)

      Enrico Bernardo, Marco De Lazzari, Paolo Colombo, Alejandro Saburit Llaudis and Francisco Javier Garcìa-Ten

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200900280

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      The usage of porcelain stoneware in the coverage of vertical surfaces is limited by the relatively high density. It is discussed a reduction of density of about 30%, coupled to a limited water absoption (about 2%), by the addition of CeO2 in the raw materials. The porosity is caused by the evolution of oxygen, by high temperature reduction to Ce2O3, that depends both on sintering temperature, holding time, and concentration of additive.

    10. Synthesis and Characterization of Electrospun Mullite Nanofibers (pages 71–74)

      Jiang Wu, Hong Lin, Jianbao Li, Xiaobo Zhan and Junfeng Li

      Article first published online: 27 NOV 2009 | DOI: 10.1002/adem.200900222

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      In this study, continuous mullite (3Al2O3·2SiO2) nanofibers were fabricated by sol–gel and electrospinning techniques and calcined at high temperatures to obtain pure ceramic mullite nanofibers. Detail structural characterizations suggested that the productive rate of electrospun mullite nanofibers were very high and the sintered nanofibers were made of single crystalline grains with size of approximately 100 nm.

    11. Crystalline γ-Alumina Deposited in an Industrial Coating Unit for Demanding Turning Operations (pages 75–79)

      Kirsten Bobzin, Nazlim Bagcivan and Mara Ewering

      Article first published online: 11 NOV 2009 | DOI: 10.1002/adem.200900232

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      Crystalline PVD γ-Al2O3 coatings offer great potential for use in high-speed cutting operations. The present work gives an overview of the deposition of γ-Al2O3 thin films on WC/co-cutting inserts by using pulsed MSIP (magnetron sputter ion plating) PVD technology. A (Ti,Al)N bond coat was employed to improve adhesion. The coating performance of the was analyzed using common thin-film test equipment. (Ti,Al)N/γ-Al2O3 displayed longer tool life than the state-of-the-art (Ti,Al)N coating.

  5. Editorial

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Advanced Biomaterials 2010: Growth (pages B1–B2)

      Prof. Klaus D. Jandt

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.201090003

  6. Review

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Computational Methods for the Development of Polymeric Biomaterials (pages B3–B17)

      Aurora D. Costache, Jayeeta Ghosh, Doyle D. Knight and Joachim Kohn

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980020

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      Computational modeling has emerged as a significant research activity in polymeric biomaterials science over the past decade. This review provides a selective survey of research in computational modeling of polymeric biomaterials since the year 2000. The figure illustrates the taxonomy of different computational simulation methods.

  7. Rapid Communication

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Construction of Polyethyleneimine-β-cyclodextrin/pDNA Multilayer Structure for Improved In Situ Gene Transfection (pages B18–B25)

      Yan Hu, Kaiyong Cai, Zhong Luo and Ran Hu

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980006

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      This study reports in situ gene delivery from gene-functionalized poly(D,L-lactic acid) (PDLLA) films, which were constructed via layer-by-layer (LbL) assembly technique with low molecular weight polyethylenimine-β-cyclodextrin (PEI-CD) conjugate and plasmid DNA (pDNA). PEI-CD was characterized by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR), respectively. PEI-CD improved the gene transfection efficiency when compared with that of PEI. Such gene-functionalized biomaterial reported here has potential application in tissue engineering and implant technology.

  8. Research Article

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Effect of Silicate-Substitution on Attachment and Early Development of Human Osteoblast-Like Cells Seeded on Microporous Hydroxyapatite Discs (pages B26–B36)

      Katharina Guth, Charlie Campion, Tom Buckland and Karin A. Hing

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980003

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      Hydroxyapatite (HA) is a well-established graft material used in bone repair. Silicon-substituted hydroxyapatite (SA; 0.8 wt% Si) has shown greater bone ingrowth and bone coverage than phase pure HA. To assess the effect of microporosity on sensitivity of cell attachment to surface physiochemistry, microporous SA and HA discs, and control Thermanox (TMX) discs were incubated with osteoblast-like cells under differing tissue culture conditions. To investigate early cellular attachment, organization, and differentiation, cells were also stained for integrin–α5β1, actin, and runt-related transcription factor (RUNX-2), respectively, after incubation on HA, SA, and TMX discs for 3 days.

  9. Communication

    1. Top of page
    2. Cover Picture
    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Development of Biomimetic Chitosan-Based Hydrogels Using an Elastin-Like Polymer (pages B37–B44)

      Joaquim S. Barbosa, Artur Ribeiro, Ana M. Testera, Matilde Alonso, Francisco J. Arias, José C. Rodríguez-Cabello and João F. Mano

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980152

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      Chitosan and an elastin-like polymer, containing a specific osteoconductive sequence in the primary structure, have been combined to obtain bioactive injectable systems with enhanced mechanical properties and hydrogels. Obtained results indicate that the combination of such polymers may be very promising in the development of biomaterials for minimal invasive orthopaedic reconstructive applications or in bone tissue engineering. The figure shows a thermo-sensitive hydrogel, with a gelation point under physiological temperature.

  10. Research Articles

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Photopolymerizable Hydrogels Made from Polymer-Conjugated Albumin for Affinity-Based Drug Delivery (pages B45–B52)

      Liat Oss-Ronen and Dror Seliktar

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980005

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      As a drug delivery vehicle, biodegradable albumin hydrogels can combine the high binding capacity of albumin with the structural stability of a polymeric hydrogel network to enable controlled release of small molecules based on both binding affinity and physical interactions. In the present study, we report on the development of a hybrid hydrogel composed of albumin conjugated to poly(ethylene glycol) (PEG) for drug delivery applications where controlled release is accomplished using the natural affinity of the drugs to the serum albumin.

    2. Bovine Serum Albumin and Lysozyme Adsorption on Calcium Phosphate Particles (pages B53–B61)

      Berit Mueller, Martin Zacharias and Kurosch Rezwan

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980024

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      Two model proteins – bovine serum albumin and lysozyme – are used to investigate the protein adsorption behaviour of hydroxyapatite and beta-tricalcium phosphate particles. Both proteins form a monolayer on β-TCP, but only semi-monolayers on hydroxyapatite. The spatial charge distribution of both proteins is modelled to get a further understanding of the initial adsorption orientations (see image).

  11. Communication

    1. Top of page
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    3. Inside Front Cover
    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
    12. Communication
    13. Rapid Communication
    1. Dual-Growth-Factor-Releasing PCL Scaffolds for Chondrogenesis of Adipose-Tissue-Derived Mesenchymal Stem Cells (pages B62–B69)

      Sung Mook Lim, Sung Hwan Jang, Se Heang Oh, Soon Hong Yuk, Gun Il Im and Jin Ho Lee

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980153

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      Dual-growth-factor (TGF-β2/BMP-7)-immobilized PCL/Pluronic F127 porous scaffolds were fabricated using a modified melt-molding particulate-leaching method followed with the binding of heparin and growth factors onto the pore surfaces of the scaffolds. From the in vitro chondrogenesis study, it was observed that the dual TGF-β2/BMP-7-immobilized scaffold induced better chondrogenic differentiation than the single-growth-factor-immobilized scaffolds or control scaffold (without growth factor), probably owing to the synergistic effect of both growth factors.

  12. Rapid Communication

    1. Top of page
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    4. Contents
    5. Communications
    6. Editorial
    7. Review
    8. Rapid Communication
    9. Research Article
    10. Communication
    11. Research Articles
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    13. Rapid Communication
    1. Electrolytic Deposition of Hydroxyapatite Coating on CoNiCrMo Substrates (pages B70–B73)

      Dong-Yang Lin, Yong Jiang and Xiao-Xiang Wang

      Article first published online: 18 FEB 2010 | DOI: 10.1002/adem.200980013

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      HA crystals prepared by electrolytic deposition(ELD) on Co alloy in dilute solution at 80°C showed a typical morphology of hexagonal prism(a). An interesting phenomenon was that the same HA crystals also formed on the accompanying uncharged substrates(here being glass, b) placed parallel to the cathodic Co alloy with a spacing of 1mm. The result indicates the local pH plays a crucial role in the ELD process.

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