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Fabrication, mechanical and thermal behaviors of antiperovskite manganese nitride Mn3.1Zn0.5Sn0.4N reinforced aluminum matrix composites
Composites Part B: Engineering ( IF 13.1 ) Pub Date : 2021-06-15 , DOI: 10.1016/j.compositesb.2021.109080
He Cao , Yishi Su , Di Zhang , Qiubao Ouyang

Lightweight aluminum matrix composites with excellent mechanical and thermal properties are urgently required in applications of aerospace, electronics and military industries owning dimensional stability and long-life span. Antiperovskite manganese nitrides can be regarded as ideal reinforcements due to their high mechanical properties, low negative thermal expansion and wide temperature ranges. In this paper, 30 vol % Mn3.1Zn0.5Sn0.4N/Al composites with Mn3.1Zn0.5Sn0.4N particle sizes of 130, 63 and 12 μm were fabricated by vacuum hot-pressing sintering under sintering temperatures of 450, 500 and 550 °C, respectively. Material phase analysis, microstructural characterization, and bulk density measurements of Mn3.1Zn0.5Sn0.4N/Al composites are conducted. Three-point bending and nano-indentation mechanical properties of Mn3.1Zn0.5Sn0.4N/Al composites are studied, while thermal expansion and conductivity of Mn3.1Zn0.5Sn0.4N/Al composites are also investigated. For the Mn3.1Zn0.5Sn0.4N/Al composite sintered at 450 °C with particle size of 130 μm, the Young's modulus of 87.35 GPa, flexural strength of 169.3 ± 7.60 MPa and flexural strain of 3.62 ± 0.09% are produced. Meanwhile, the lowest coefficient of thermal expansion of 3.14 ppm °C−1 and largest thermal conductivity of 126.2 ± 7.0 W m−1 K−1 are possessed as well. Semi-coherent and coherent interfaces of Al–Mn and Sn–Mn3.1Zn0.5Sn0.4N with a width of ~100 nm are determined, which clearly indicates the interfacial characteristics within the Mn3.1Zn0.5Sn0.4N/Al interfacial micro-zones. This work can provide a good understanding and guide for designing and preparing novel structural-functional composite materials with excellent mechanical and thermal properties.



中文翻译:

反钙钛矿氮化锰Mn 3.1 Zn 0.5 Sn 0.4 N增强铝基复合材料的制备、力学和热性能

航空航天、电子和军工行业迫切需要具有优异机械和热性能的轻质铝基复合材料,具有尺寸稳定性和长寿命。由于其高机械性能、低负热膨胀和宽温度范围,反钙钛矿氮化锰可被视为理想的增强材料。在本文中,30 vol % Mn 3.1 Zn 0.5 Sn 0.4 N/Al 复合材料与 Mn 3.1 Zn 0.5 Sn 0.4分别在 450、500 和 550 °C 的烧结温度下通过真空热压烧结制备了粒径为 130、63 和 12 μm 的 N。对 Mn 3.1 Zn 0.5 Sn 0.4 N/Al 复合材料进行了材料相分析、微观结构表征和堆积密度测量。三点弯曲和纳米压痕的Mn机械性能3.10.5的Sn 0.4 N / Al复合材料进行了研究,而热膨胀和Mn的电导率3.10.5的Sn 0.4 N / Al复合材料也影响。对于 Mn 3.1 Zn 0.5 Sn 0.4N/Al 复合材料在 450 °C 下烧结,粒径为 130 μm,杨氏模量为 87.35 GPa,弯曲强度为 169.3 ± 7.60 MPa,弯曲应变为 3.62 ± 0.09%。同时,还具有3.14 ppm °C -1的最低热膨胀系数和126.2 ± 7.0 W m -1  K -1 的最大热导率。确定了宽度约为 100 nm的 Al-Mn 和 Sn-Mn 3.1 Zn 0.5 Sn 0.4 N 的半相干和相干界面,这清楚地表明了 Mn 3.1 Zn 0.5 Sn 0.4内的界面特性N/Al 界面微区。这项工作可以为设计和制备具有优异机械和热性能的新型结构功能复合材料提供很好的理解和指导。

更新日期:2021-06-28
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