向商用镁合金中添加氧化铝纳米颗粒：多种有益效果。

Al₂O₃ Nanoparticle Addition to Commercial Magnesium Alloys: Multiple Beneficial Effects.

作者信息

Paramsothy Muralidharan, Chan Jimmy, Kwok Richard, Gupta Manoj

机构信息

Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore.

Singapore Technologies Kinetics Ltd (ST Kinetics), 249 Jalan Boon Lay, 619523, Singapore.

出版信息

Nanomaterials (Basel). 2012 May 29;2(2):147-162. doi: 10.3390/nano2020147.

DOI:10.3390/nano2020147

PMID:28348301

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5327894/

Abstract

The multiple beneficial effects of Al₂O₃ nanoparticle addition to cast magnesium based systems (followed by extrusion) were investigated, constituting either: (a) enhanced strength; or (b) simultaneously enhanced strength and ductility of the corresponding magnesium alloys. AZ31 and ZK60A nanocomposites containing Al₂O₃ nanoparticle reinforcement were each fabricated using solidification processing followed by hot extrusion. Compared to monolithic AZ31 (tension levels), the corresponding nanocomposite exhibited higher yield strength (0.2% tensile yield strength (TYS)), ultimate strength (UTS), failure strain and work of fracture (WOF) (+19%, +21%, +113% and +162%, respectively). Compared to monolithic AZ31 (compression levels), the corresponding nanocomposite exhibited higher yield strength (0.2% compressive yield strength (CYS)) and ultimate strength (UCS), lower failure strain and higher WOF (+5%, +5%, -4% and +11%, respectively). Compared to monolithic ZK60A (tension levels), the corresponding nanocomposite exhibited lower 0.2% TYS and higher UTS, failure strain and WOF (-4%, +13%, +170% and +200%, respectively). Compared to monolithic ZK60A (compression levels), the corresponding nanocomposite exhibited lower 0.2% CYS and higher UCS, failure strain and WOF (-10%, +7%, +15% and +26%, respectively). The capability of Al₂O₃ nanoparticles to enhance the properties of cast magnesium alloys in a way never seen before with micron length scale reinforcements is clearly demonstrated.

摘要

研究了向铸造镁基体系中添加Al₂O₃纳米颗粒（随后进行挤压）的多种有益效果，这些效果包括：（a）强度增强；或（b）相应镁合金的强度和延展性同时增强。分别采用凝固工艺随后进行热挤压制备了含有Al₂O₃纳米颗粒增强体的AZ31和ZK60A纳米复合材料。与整体AZ31（拉伸水平）相比，相应的纳米复合材料表现出更高的屈服强度（0.2%拉伸屈服强度（TYS））、极限强度（UTS）、断裂应变和断裂功（WOF）（分别提高了19%、21%、113%和162%）。与整体AZ31（压缩水平）相比，相应的纳米复合材料表现出更高的屈服强度（0.2%压缩屈服强度（CYS））和极限强度（UCS），更低的断裂应变和更高的WOF（分别提高了5%、5%、-4%和11%）。与整体ZK60A（拉伸水平）相比，相应的纳米复合材料表现出更低的0.2% TYS和更高的UTS、断裂应变和WOF（分别降低了4%、提高了13%、170%和200%）。与整体ZK60A（压缩水平）相比，相应的纳米复合材料表现出更低的0.2% CYS和更高的UCS、断裂应变和WOF（分别降低了10%、提高了7%、15%和26%）。Al₂O₃纳米颗粒以微米长度尺度增强体前所未有的方式增强铸造镁合金性能的能力得到了明确证明。