Abstract In this study, a high strength aluminum-magnesium interface structure was prepared by spark plasma sintering using powder metallurgy. Effects of sintering pressure on the Al–Mg interfacial structure and bonding strength were investigated. The mechanism of formation and evolution of the interface were obtained from characterizing the interface. Results from microstructural observations indicate that interfacial structure changes from solid layers to liquid layers with an increase in sintering pressure; also, bonding strength increases. Maximum interfacial bonding strength reached 59.96 MPa with a sintering pressure of 40 MPa. Each fracture shows characteristics of brittle fracture. Solid layers are composed of a Cu segmentation region and Al3Mg2 and Al12Mg17 intermetallic compound layers. The orientation relationship between Al3Mg2 and Al12Mg17 was determined to be [ 1 ‾ 33 ] A l 3 M g 2 || [ 014 ] A l 12 M g 17 and 2 ‾ 00 A l 12 M g 17 || ( 0 2 ‾ 2 ) A l 3 M g 2 . Formation of a liquid layer is related to the production of Al–Mg eutectic phase. A model describing the formation and evolution of the Al/Mg interface is proposed.

中文翻译：

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不同烧结压力下放电等离子烧结制备Al/Mg复合界面的力学性能及形成机制

摘要 本研究采用粉末冶金放电等离子烧结法制备了高强度铝镁界面结构。研究了烧结压力对Al-Mg界面结构和结合强度的影响。通过对界面进行表征，获得了界面形成和演化的机制。微观结构观察结果表明，随着烧结压力的增加，界面结构从固体层变为液体层；此外，结合强度增加。最大界面结合强度达到 59.96 MPa，烧结压力为 40 MPa。每个断口都表现出脆性断口的特征。实心层由 Cu 分割区和 Al3Mg2 和 Al12Mg17 金属间化合物层组成。Al3Mg2 和 Al12Mg17 之间的取向关系确定为 [ 1 ‾ 33 ] Al 3 M g 2 || [014] A l 12 M g 17 和 2 ‾ 00 A l 12 M g 17 || ( 0 2 ‾ 2 ) A l 3 M g 2 。液层的形成与 Al-Mg 共晶相的产生有关。提出了一个描述铝/镁界面形成和演化的模型。