Magnesium matrix nanocomposites reinforced with graphene nanoplatelets (GNPs) additives have long been considered as exciting prospects among nanotechnology applications. Here, the thixomolding process, an extremely efficient dispersing technology, was applied to prepare AZ91D magnesium alloy- GNPs nanocomposites with different GNPs contents (0, 0.1, 0.3, 0.6, 0.9 and 1.2 wt%). The effects of screw rotate rate (R_S) and injection velocity (V_I) on microstructures, GNPs dispersibility and mechanical properties were investigated. The GNPs, fairly uniform dispersion in the nanocomposites, were incorporated in the α-Mg grains, not only in the grain boundaries. Strong bonding interfaces between GNPs and alloy matrix were established because of the formed MgO nanoparticles leading to the formation of Mg/MgO semi-coherency interface and MgO/GNPs interface. Compared with other previously reported results, a relatively higher overall efficiency was achieved in the prepared magnesium matrix nanocomposites. The developed technology has a potential for large-scale industrial production of not only thin-walled complex parts, but also thick-walled products such as automobile parts with complex structure.

长期以来，石墨烯纳米片（GNPs）添加剂增强的镁基纳米复合材料一直被认为是纳米技术应用中令人兴奋的前景。在这里，触变成型工艺是一种非常有效的分散技术，被用于制备具有不同GNP含量（0、0.1、0.3、0.6、0.9和1.2 wt％）的AZ91D镁合金-GNPs纳米复合材料。螺杆转速（R _S）和注射速度（V _{I）的影响}）在微观结构上，研究了GNP的分散性和力学性能。在纳米复合物中相当均匀分散的GNP不仅被掺入了晶界，还被掺入了α-Mg晶粒中。由于形成的MgO纳米颗粒导致Mg / MgO半相干界面和MgO / GNPs界面的形成，因此在GNP与合金基体之间建立了牢固的键合界面。与其他先前报道的结果相比，在制备的镁基质纳米复合材料中获得了相对较高的总体效率。所开发的技术不仅可以用于薄壁复杂零件的大规模工业生产，而且还可以用于厚壁产品（例如结构复杂的汽车零件）的大规模工业生产。