Mg-Zn-Y alloys with long-period stacking ordered structures (LPSO) have attracted attention due to their excellent mechanical properties. In addition to the LPSO structure, Mg alloys can also be strengthened by oxide particles. In the present study, oxide dispersion strengthened Mg₉₇Zn₁Y₂ (at%) alloys were prepared by equal channel angular pressing (ECAP) of mechanical alloyed (MA) powder under an oxygen gas atmosphere. The 20-h-MA powder had a particle size of 28 μm and a crystallite size of 36 nm. During the MA process followed by ECAP, an Mg matrix with dispersed Y₂O₃ (and MgO) particles was formed. The alloy processed by ECAP exhibited a hardness of 110 HV and a compressive strength of 185 MPa. Compared to pure Mg, the increased hardness was due to the dispersion strengthening of Y₂O₃ and MgO particles and solution strengthening of Zn and Y.

中文翻译：

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机械合金粉末的等通道角挤压生产氧化物弥散强化的Mg-Zn-Y合金

具有长周期堆积有序结构（LPSO）的Mg-Zn-Y合金由于其优异的机械性能而备受关注。除LPSO结构外，镁合金还可通过氧化物颗粒增强。在本研究中，通过在氧气气氛下对机械合金化（MA）粉末进行等通道角挤压（ECAP），制备了氧化物弥散强化的Mg ₉₇ Zn ₁ Y ₂（at％）合金。20h-MA粉末具有28μm的粒度和36nm的微晶尺寸。在MA过程中，接着进行ECAP，即分散Y ₂ O ₃的Mg基质（和MgO）颗粒形成。经ECAP处理的合金表现出110 HV的硬度和185 MPa的抗压强度。与纯Mg相比，增加的硬度归因于Y ₂ O ₃和MgO颗粒的分散增强以及Zn和Y的固溶增强。