Advanced Engineering Materials

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Recently Published Articles

  1. Nanocavities Double the Toughness of Graphene–Polycarbonate Composite

    Wei Ming Huang, Wei Fu Sun, Guo Hua Chen and Li Tan

    Article first published online: 24 APR 2014 | DOI: 10.1002/adem.201400143

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    Compounding carbon black (CB) and polycarbonate (PC) at 300 °C can trigger a nontrivial air expansion inside the polymer matrix, resulting in many cavity-wrapped particulates. When graphene nanoplatelets (GNP) are further added, graphene shows a unique capability in peeling the air sheath from the particulates, giving rise to nanocavities everywhere and a much improved toughness (100%).

  2. Phase Change Heat Insulation Based on Wax-Clay Nanotube Composites

    Yafei Zhao, Suvhashis Thapa, Leland Weiss and Yuri Lvov

    Article first published online: 24 APR 2014 | DOI: 10.1002/adem.201400094

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    The shape stabilized wax composites maintained shape without liquid leakage being heated above the melting wax temperature and subjected to more than 50 melting-freezing cycles. Halloysite nanotube matrix provides strength for the phase changing composites and prevents the seepage of the melted wax. Halloysite and carbon serve as supporting materials and thermal conductivity promoter of wax.

  3. Effect of Aging on Microstructure and Mechanical Strength of Reactive Air Brazed BSCF/AISI 314-Joints

    Anke Kaletsch, Ewald M. Pfaff and Christoph Broeckmann

    Article first published online: 22 APR 2014 | DOI: 10.1002/adem.201400102

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    Long-term application of reactive air brazed BSCF/AISI314-joints at elevated temperatures leads in a decrease of the joint strength. Tensile tests show a drop of 55% of the joint strength after aging for 500 h at 850 °C in air. Reason for that is a change in the microstructure of the ceramic at the braze interface, which is characterized by high and irregular formed porosity.

  4. Effect of Combined Micro-Alloying of Calcium and Bismuth on the Microstructure and Mechanical Properties of AM50 Magnesium Alloy

    Zhang Ya-Qing, Luo Xiao-Ping and Dang Su-E

    Article first published online: 22 APR 2014 | DOI: 10.1002/adem.201400043

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    A microstructure and mechanical properties of as-cast AM50 magnesium alloys with different content of calcium and bismuth are characterized. Optimum combination on microstructure mechanical properties is obtained, which is expected to show good mechanical properties.

  5. Precipitation in a Nanograined 7475 Aluminium Alloy—Processing, Properties and Nanoanalysis

    Malgorzata Lewandowska, Kinga Wawer, Pawel Kozikowski, Masato Ohnuma and Krzysztof J. Kurzydlowski

    Article first published online: 17 APR 2014 | DOI: 10.1002/adem.201400018

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    Precipitation strengthening in a nanograined 7475 aluminium alloy obtained by hydrostatic extrusion of water quenched samples is studies. Low temperature ageing causes precipitation processes and strengthening phenomena. However, the particle strengthening is limited by enhanced grain boundary precipitation and smaller size of precipitates.

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