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Fabrication, characterization, and mechanical properties of spark plasma sintered Al-BN nanoparticle composites

机译：火花等离子体烧结Al-BN纳米粒子复合材料的制备，表征和力学性能

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摘要

Fabrication of high strength yet light and low cost composite materials with good mechanical properties at room and elevated temperatures is a challenge that metallurgy and materials science communities are facing for many years, and no "dream material" has been developed so far. The primary goal of this study was to fabricate, characterize, and to carry out tensile tests on Al-based composite materials strengthened with commercially-available BN nanoparticles (BNNPs). The composites were fabricated by spark plasma sintering (SPS) technique. The structures of powder mixtures and composite materials, as well as their fracture surfaces, were studied by scanning and transmission electron microscopy. The influence of BNNPs content (0.5, 1.5, 3, 4.5, 6, and 7.5 wt%) and holding times (5, 60, and 300 min) at 600 ℃ during SPS on the tensile strength was investigated. A maximum increase in strength was observed for Al-based composites with 4.5 wt% of BNNPs. The sample demonstrated a 50% increase in tensile strength compared with pristine Al. Although the tensile tests performed at 300 ℃ revealed that the tensile strength became 20% lower than the strength at room temperature, it was, however, still 75% higher compared with that of the pure Al at 300 ℃ In addition, at 300 ℃ the Al-BNNPs composites demonstrated a much higher value of yield stress, about 115 MPa, which is 190% higher than that of pure Al at the same temperature. The damping properties of Al-BNNPs composites were evaluated by temperature dependent internal friction (TDIF) measurements. The obtained results are discussed based on structural analysis and the TDIF data.
机译：在室温和高温下具有良好机械性能的高强度轻质低成本复合材料的制造是冶金和材料科学界多年来面临的挑战，迄今为止，还没有开发出“梦想材料”。这项研究的主要目的是制造，表征和对以市售BN纳米颗粒（BNNP）增强的Al基复合材料进行拉伸测试。通过火花等离子体烧结（SPS）技术制备复合材料。通过扫描和透射电子显微镜研究了粉末混合物和复合材料的结构及其断裂表面。研究了SNN在600℃下BNNPs含量（0.5、1.5、3、4.5、6和7.5 wt％）和保持时间（5、60和300 min）对拉伸强度的影响。对于具有4.5重量％的BNNP的Al基复合材料，观察到强度的最大增加。与原始Al相比，样品的抗拉强度提高了50％。尽管在300℃下进行的拉伸试验表明，其拉伸强度比室温下的强度低20％，但与300℃下的纯Al相比仍高出75％。此外，在300℃下， Al-BNNPs复合材料的屈服应力值更高，约为115 MPa，比相同温度下的纯Al高190％。 Al-BNNPs复合材料的阻尼性能通过温度依赖性内摩擦（TDIF）测量进行评估。基于结构分析和TDIF数据讨论了获得的结果。

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  • 来源
    《Materials Science and Engineering》 |2015年第26期|104-112|共9页
  • 作者

    Konstantin L. Firestein; Alexander E. Steinman; Igor S. Golovin; Joan Cifre; Ekaterina A. Obraztsova; Andrei T. Matveev; Andrey M. Kovalskii; Oleg I. Lebedev; Dmitry V. Shtansky; Dmitri Golberg;

  • 作者单位

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    Universitat de les Illes Balears, Ctra. de Valldemossa, km. 7.5, E-07122 Palma de Mallorca, Spain;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    CRISMAT, UMR 6508, CNRS-ENSICAEN, 6Bd Marechal Juin, 14050 Caen, France;

    National University of Science and Technology 'MISIS', Leninsky prospect 4, Moscow 119049, Russian Federation;

    World Premier International Center for Materials Nanoarchitectonics (WPI-MANA) National Institute for Materials Science (NIMS), Namiki 1, Tsukuba, Ibaraki 3050044, Japan;

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  • 正文语种 eng
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  • 关键词

    Composite materials; Spark plasma sintering; Structure; Tensile strength; Internal friction;

    机译：复合材料;火花等离子体烧结;结构体;抗拉强度;内摩擦;

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