微量添加Nb元素对原位合成Cu基非晶复合材料力学性能的影响（英文）

发布时间：2018-06-21 05:15

本文选题：块体非晶复合材料 + Nb添加　；参考：《Transactions of Nonferrous Metals Society of China》2017年02期

【摘要】：利用铜模铸造法获得(Cu_(0.6)Zr_(0.3)Ti_(0.1))_(95)Nb_5块体非晶复合材料试样。该试样中均匀分布富Nb元素的枝晶相。结果表明,相比于非晶基体,枝晶具有更低的硬度值和弹性模量,在加载变形过程中,非晶基体和枝晶界面处产生应力集中,促使非晶基体中剪切带的萌生和分叉增殖,最终获得了约2200 MPa的压缩断裂强度和6.08%断裂应变。与其他Cu基非晶复合材料相比,所制备的(Cu_(0.6)Zr_(0.3)Ti_(0.1))_(95)Nb_5非晶复合材料断裂强度没有明显的降低,证明添加Nb元素是一种非常容易和有效制备实用高强度、高塑性非晶复合材料的方法。
[Abstract]:Copper mold casting method was used to obtain the bulk amorphous composite samples of CuSZ 0.6 Zirx 0.3D Tiji 0.1D / NbS5 bulk. The results show that the bulk amorphous composites have been obtained by means of copper mold casting method, and the results show that the bulk amorphous composites can be obtained. The dendrite phase with rich NB element is uniformly distributed in the sample. The results show that the dendrite has lower hardness and elastic modulus than the amorphous matrix. During the loading and deformation, the stress concentration at the interface between the amorphous matrix and the dendrite leads to the initiation and bifurcation of the shear band in the amorphous matrix. Finally, the compressive fracture strength of about 2200 MPA and the fracture strain of 6.08% were obtained. Compared with other Cu based amorphous composites, the fracture strength of the prepared amorphous composites is not significantly reduced. It is proved that the addition of NB element is a very easy and effective method for preparing practical high strength and high plasticity amorphous composites.
【作者单位】：西北工业大学凝固技术国家重点实验室;
【基金】：Project(51371149)supported by the National Natural Science Foundation of China Project(151048)supported by the HUO Ying-dong Young Teacher Fund Project(2015ZF53066)supported by the Aeronautical Science Foundation of China Project(92-QZ-2014)supported by the Free Research Fund of State Key Laboratory of Solidification Processing,China Project(2015KJXX-10)supported by Shaanxi Young Stars of Science and Technology,China Proejct(2011CB610403)supported by the National Basic Research Program of China Project(51125002)supported by the National Science Funds for Distinguished Young Scientists,China
【分类号】：TG139.8

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