The reinforcing effect of graphene nano-platelets on the cryogenic mechanical properties of GNPs/Al2O3 composites

The reinforcing effect of graphene nano-platelets on the cryogenic mechanical properties of GNPs/Al2O3 composites
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石墨烯纳米片对GNPs/Al2O3复合材料低温力学性能的增强作用

DOI:
10.1016/j.jallcom.2016.08.314
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发表时间:
2017-01
影响因子:
6.2
通讯作者:
Zhipeng Xie
Zhipeng Xie
中科院分区:
材料科学2区
文献类型:
--
作者:
Weiwei Wu;Jingya Gui;Wei Sai;Zhipeng Xie

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首次报道了石墨烯纳米片增强氧化铝纳米复合材料在低温下的力学性能。采用胶体法制备了GNP/Al 2 O3复合材料。随着温度从293 K降低到77 K,硬度随温度的增加伴随着断裂韧性的显著增加。GNP/Al_2O_3复合材料中GNP的最佳含量为1.0vol%。在理论计算和分析的基础上,讨论了残余应力对韧性和断裂模式的影响。低温有助于石墨烯在复合材料中的增强作用。
The mechanical properties of the graphene nano-platelets reinforced alumina nanocomposites at cryogenic temperature are reported for the first time. The GNPs/Al2O3composites are fabricated by a colloidal process. The temperature-dependent increase in hardness is accompanied by a substantial increase in fracture toughness with the temperature decreasing from 293 K to 77 K. The optimum content of GNPs in GNPs/Al2O3composites is 1.0 vol%. The effect of residual stress on the toughness and fracture mode is discussed on the basis of theoretical calculation and analysis. Cryogenic temperature has contributed to the reinforcing effect of graphene in composites.
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