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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of La2O3 Nanoparticles on the Brazeability, Microstructure, and Mechanical Properties of Al-11Si-20Cu Alloy
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Effect of La2O3 Nanoparticles on the Brazeability, Microstructure, and Mechanical Properties of Al-11Si-20Cu Alloy

机译：La2O3纳米颗粒对Al-11Si-20Cu合金钎焊性能，显微组织和力学性能的影响

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摘要

The Al-11Si-20Cu brazing alloy and its ex situ composite with the content ranging from 0.01 to 0.05 wt.% of La2O3 are produced by electromagnetic induction-cum-casting route. The brazeability of the alloy and composite samples are tested using the spreading technique according to JIS Z-3197 standard. The mechanical properties such as filler microhardness, tensile shear strength, and elongation of the brazed joints are evaluated in the as-brazed condition. It is reported that incorporation of an optimal amount of 0.05 wt.% of hard La2O3 nanoparticles in the Al-Si-Cu matrix inhibits the growth of the large CuAl2 intermetallic compounds (IMCs) and Si particles. As a consequence, the composite filler brazeability, microhardness, joint tensile shear strength, and elongation are improved significantly compared to those of monolithic Al-11Si-20Cu alloy.
机译：通过电磁感应铸造法生产出Al 2 Si 3 Cu 12钎料及其异位复合材料，其含量为La 2 O 3的0.01〜0.05wt。％。合金和复合材料样品的钎焊性能根据JIS Z-3197标准使用扩展技术进行测试。在钎焊条件下评估了机械性能，例如填料的显微硬度，拉伸剪切强度和钎焊接头的伸长率。据报道，在Al-Si-Cu基体中掺入最佳量的0.05wt。％的硬La 2 O 3纳米颗粒抑制了大的CuAl 2金属间化合物（IMC）和Si颗粒的生长。结果，与整体式Al-11Si-20Cu合金相比，复合填料的钎焊性，显微硬度，接头拉伸剪切强度和伸长率得到显着改善。

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