A novel Al matrix composite reinforced by nano-AlN(p) network.

A novel Al matrix composite reinforced by nano-AlN(p) network.
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纳米 AlNp 网络增强的新型铝基复合材料

DOI:
10.1038/srep34919
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发表时间:
2016-10-10
期刊:
影响因子:
4.6
通讯作者:
Liu XF
Liu XF
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ma X;Zhao YF;Tian WJ;Qian Z;Chen HW;Wu YY;Liu XF

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为了追求汽车的轻量化和运输的低排放,一直在努力开发高强度、耐热和耐疲劳的Al合金和/或复合材料。在这里,我们报告了一种新的铝基复合材料的三维网络的纳米AlN颗粒增强的抗弯强度为第一次。原位合成的AlN颗粒通过孪晶键链连接起来,形成三维网状结构,极大地增强了Al基体,就像人体的骨架。该复合物含有16.4wt.% AlN颗粒具有优异的性能:室温抗拉强度可达518 MPa,350 °C抗拉强度可达190 MPa。这种特殊的性能是由于纳米尺度AlN颗粒的新颖空间分布。我们的研究结果将有助于开发高性能耐热轻金属基材料的潜在候选者。
In pursuit of lightweighting of automobiles and low emission of transportation, the efforts to develop high-strength, heat-resistant and fatigue-resistant Al alloys and/or composites have been ongoing. Here we report a novel Al matrix composite with ultrahigh strength reinforced by a three dimensional network of nano-AlN particles for the first time. The in-situ synthesized AlN particles are connected by twinning bonding chains and built up a three dimensional network strengthening Al matrix enormously like the skeleton to human body. The composite containing 16.4wt.% AlN particles shows excellent properties: the ultimate tensile strengths can be up to 518MPa at room temperature and 190MPa at 350 °C. This peculiar performance results from the novel spatial distribution of nano-scale AlN particles. Our findings in this work would help to develop a potential candidate for high-performance heat resistance light-metal based materials.
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