Advanced Engineering Materials

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Recently Published Articles

  1. Self-Catalytic Growth of β-Ga2O3 Nanostructures by Chemical Vapor Deposition

    Sudheer Kumar, Christian Tessarek, George Sarau, Silke Christiansen and Rajendra Singh

    Article first published online: 17 SEP 2014 | DOI: 10.1002/adem.201400289

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    Self catalytic growth of beta-gallium oxide (β-Ga2O3) nanostructures has been reported. The detail structural, morphological and optical analyses of as-grown nanostructures are carried out using various techniques such as X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, Raman and cathodoluminescence. The as-grown nanostructures are monoclinic and single crystalline with excellent optical properties.

  2. Purification of Carbon Nanotube Sheets

    Yi Lin, Jae-Woo Kim, John W. Connell, Marisabel Lebrón-Colón and Emilie J. Siochi

    Article first published online: 12 SEP 2014 | DOI: 10.1002/adem.201400306

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    Purification of carbon nanotube macroscopic assemblages such as sheets presents additional challenges in comparison to that established for powdery carbon nanotubes. It is demonstrated that large-sized carbon nanotube sheets can be effectively purified to remove residual metal catalysts while retaining their structural integrity and mechanical properties for their use in structural composites.

  3. Processing of High Strength Light-Weight Metallic Composites

    Werner Skrotzki, Andy Eschke, Jan Romberg, Juliane Scharnweber, Tom Marr, Romy Petters, Ilya Okulov, Carl-Georg Oertel, Jens Freudenberger, Uta Kühn, Ludwig Schultz and Jürgen Eckert

    Article first published online: 11 SEP 2014 | DOI: 10.1002/adem.201400190

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    Severe plastic deformation is used to produce Ti/Al laminated sheets and filament wires, namely accumulative roll bonding and accumulative swaging and bundling. The evolution of microstructure, texture, and strength of the composites with regard to cycle number n is discussed.

  4. Guiding and Deflecting Cracks in Bulk Metallic Glasses to Increase Damage Tolerance

    Jun Yi, Wei Hua Wang and John J. Lewandowski

    Article first published online: 3 SEP 2014 | DOI: 10.1002/adem.201400209

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    Pre-existing shear bands (PESBs) are introduced at stress concentration of bulk metallic glasses. Such PESBs channel and guide cracks to deflect beyond plastic zone in which stress is concentrated while cavitation is inhibited during crack propagation. As a result, the fracture resistance of bulk metallic glasses is improved significantly.

  5. Low-Molecular Mass Organic Gelcasting of Titanium Hydride to Prepare Titanium

    Qing Ye, Zhimeng Guo, Boxin Lu, Junpin Lin and Huiping Shao

    Article first published online: 3 SEP 2014 | DOI: 10.1002/adem.201400253

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    Low-molecular mass organic gelcasting is firstly utilized to fabricate titanium structural materials. The aim is to find a low-residual gel system for the fabrication of titanium with good ductility. The thermally reversible gel system is composed of 1,3:2,4-dibenzylidene sorbitol (gelator) and 1-butanol (solvent). Rosin is used to increase the green strength. After sintering, the contents of oxygen and carbon contamination are 0.31 and 0.08 wt%, respectively, which contribute to a high-level of mechanical property with tensile strength of 580 MPa and elongation of 8%. Eventually, titanium parts with complex shape are successfully prepared.

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