沈阳工业大学学报2017，Vol.39Issue(5)：501-506,6.DOI:10.7688/j.issn.1000-1646.2017.05.05
Zn、Y对普通凝固Mg-Zn-Y合金组织性能的影响
Effect of Zn and Y on microstructures and properties of normally-solidified Mg-Zn-Y alloys
摘要
Abstract
In order to obtain a high-quality quasicrystal alloy with icosahedron quasicrystal phase, the Mg-Zn-Y alloys were prepared with the permanent mold casting method. The influence of Zn and Y elements on the microstructures and properties of the alloys were investigated with scanning electron microscope ( SEM ) , energy dispersive spectrometer ( EDS ) , X ray diffractometer ( XRD ) and Vickers hardness tester, and the forming mechanism of quasicrystal phase was analyzed. The results show that the quasicrystal phase can nucleate and grow directly from the liquid phase under the condition of normal solidification. In addition, the hardness of the alloys as well as the morphology, size and distribution of quasicrystal phase are closely related to the content of Zn and Y elements. With increasing the Zn content, the hardness of Mg-xZn-4. 5Y alloys gradually increases. The quasicrystal phase changes from the petal-like shape to strip shape, and the lamellar eutectic and α-Mg phase gradually disappear. With increasing Y content, the hardness of Mg-48Zn-yY alloys gradually increases. The amount of petal-like quasicrystal phase increases, and the lamellar eutectic becomes more compact. The high-quality quasicrystal alloy Mg-48Zn-13Y can be obtained through adjusting the Zn and Y contents.关键词
Mg-Zn-Y合金/稀土/凝固/二十面体/准晶/硬度/显微组织/力学性能Key words
Mg-Zn-Y alloy/rare earth/solidification/icosahedron/quasicrystal/hardness/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
王峰,马德志,王志,刘正,毛萍莉..Zn、Y对普通凝固Mg-Zn-Y合金组织性能的影响[J].沈阳工业大学学报,2017,39(5):501-506,6.基金项目
国家自然科学基金资助项目(51504153,51571145) （51504153,51571145）
辽宁省自然科学基金资助项目(201602548). （201602548）
