剥离的石墨烯纳米片状粒子(x Gn Ps)是一种新型含有石墨烯片层的3D碳类层状纳米填料。通过研究4种市售碳类填料,即x Gn Ps(xg C750、xg M5、UF1 C98)和N339炭黑(CB)与丁腈橡胶(NBR 3945)的混炼胶。采用熔融混炼方法制备纳米复合材料。...剥离的石墨烯纳米片状粒子(x Gn Ps)是一种新型含有石墨烯片层的3D碳类层状纳米填料。通过研究4种市售碳类填料,即x Gn Ps(xg C750、xg M5、UF1 C98)和N339炭黑(CB)与丁腈橡胶(NBR 3945)的混炼胶。采用熔融混炼方法制备纳米复合材料。研究了含石墨烯纳米材料橡胶的特性,如填料分散指数、硬度、每个片状粒子中石墨烯的层数、流变曲线、拉伸强度、多次滞后应力-应变、动态力学性能、介电行为和阻隔性能。展开更多
The effects of the post-deformation annealing on the microstructural evolution of hot rolled Al7075 matrix composites reinforced with CNTs and GNPs were investigated.The multi-pass hot rolling was applied on the stir ...The effects of the post-deformation annealing on the microstructural evolution of hot rolled Al7075 matrix composites reinforced with CNTs and GNPs were investigated.The multi-pass hot rolling was applied on the stir cast samples.Annealing was then applied to the composites at 450℃ for 4 h.Microstructural evolution was examined by SEM,EDS,and EBSD techniques.EBSD data showed that the addition of 0.87 vol.%(GNPs+CNTs)significantly inhibited the occurrence of recrystallization.Also,in the composite with 0.96 vol.%CNTs,recrystallization was partially inhibited.Whereas,in composites with 0.92 vol.%of GNPs,the occurrence of recrystallization through particle stimulated nucleation(PSN)mechanism was significantly accelerated.The volume fraction of recrystallized grains depends significantly on the occurrence of PSN in the presence of reinforcements.The intensity and type of the main components of the texture as well as the FCC fibers depend on the type of reinforcement.展开更多
文摘剥离的石墨烯纳米片状粒子(x Gn Ps)是一种新型含有石墨烯片层的3D碳类层状纳米填料。通过研究4种市售碳类填料,即x Gn Ps(xg C750、xg M5、UF1 C98)和N339炭黑(CB)与丁腈橡胶(NBR 3945)的混炼胶。采用熔融混炼方法制备纳米复合材料。研究了含石墨烯纳米材料橡胶的特性,如填料分散指数、硬度、每个片状粒子中石墨烯的层数、流变曲线、拉伸强度、多次滞后应力-应变、动态力学性能、介电行为和阻隔性能。
基金the Sahand University of Technology and Ghent University for the support of this research。
文摘The effects of the post-deformation annealing on the microstructural evolution of hot rolled Al7075 matrix composites reinforced with CNTs and GNPs were investigated.The multi-pass hot rolling was applied on the stir cast samples.Annealing was then applied to the composites at 450℃ for 4 h.Microstructural evolution was examined by SEM,EDS,and EBSD techniques.EBSD data showed that the addition of 0.87 vol.%(GNPs+CNTs)significantly inhibited the occurrence of recrystallization.Also,in the composite with 0.96 vol.%CNTs,recrystallization was partially inhibited.Whereas,in composites with 0.92 vol.%of GNPs,the occurrence of recrystallization through particle stimulated nucleation(PSN)mechanism was significantly accelerated.The volume fraction of recrystallized grains depends significantly on the occurrence of PSN in the presence of reinforcements.The intensity and type of the main components of the texture as well as the FCC fibers depend on the type of reinforcement.
