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首页> 外文会议>Powder metallurgy world congress exhibition;PM2010 >Influence of Manufacturing Method and Interface Activators on the Anisotropic Thermal Behaviour of Copper Carbon Nanofibre Composites
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Influence of Manufacturing Method and Interface Activators on the Anisotropic Thermal Behaviour of Copper Carbon Nanofibre Composites

机译：制备方法和界面活化剂对铜碳纳米纤维复合材料各向异性热行为的影响

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The presented consolidation method of hot pressing generally brings along a certain fibre alignment within the composite, which can be decisively improved by powder pretreatment steps. In this study a preprocessing technique for a high fibre alignment in two dimensions is shown. The second challenge addressed is the design of an interlayer between the matrix and the nanofibres for improved thermal properties of the composite. Physical vapor deposition of the carbide forming element chromium on the as received nanofibres exhibited the formation of an engineered interlayer. The planar alignment of the nanofibres was confirmed by microstructural analysis and the thermal properties of the composite were investigated by a novel method of photothermal measurements. A huge anisotropic ratio of the in-plane and out-of-plane thermal conductivities of k / k⊥=300 was found.
机译：提出的热压固结方法通常会在复合材料内产生一定的纤维排列，这可以通过粉末预处理步骤得到决定性的改善。在这项研究中，显示了用于二维高纤维对准的预处理技术。解决的第二个挑战是设计基质和纳米纤维之间的中间层，以改善复合材料的热性能。碳化物形成元素铬在所接收的纳米纤维上的物理气相沉积表现出工程中间层的形成。通过微观结构分析证实了纳米纤维的平面排列，并通过一种新颖的光热测量方法研究了复合材料的热性能。发现面内和面外热导率的巨大各向异性比为k /k⊥= 300。

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