铸态Mg-Gd-Y-Ni合金力学与降解性能研究
Mechanical and degradation properties of as-cast Mg-Gd-Y-Ni alloys
本文在稀土元素总量不变的基础上，通过调控 Y/Gd 原子比制备出一种用于油气开采领域的可溶 Mg-Gd2.94-x-Yx-Ni0.94（x=0，0.98，1.47 at.%） 合金。分析了合金微观组织演变以及力学与降解机制。结果表明铸态 Mg-Gd-Ni 合金由 α-Mg、LPSO 相、Mg5Gd 相和富 Gd 颗粒相组成，Mg-Gd-Y-Ni 合金由 α-Mg、LPSO 相、Mg5RE 相和富 RE 颗粒相组成。随着 Y/Gd 原子比的逐渐增加，合金力学与降解性能均呈现出先下降后升高的趋势。当 Y/Gd 原子比为 1 时，合金力学与降解性能最为优异，其抗拉强度为 245 MPa,屈服强度为 118 MPa,延伸率为 5.0%，25 ℃ 3.0 wt.% KCl 溶液中降解速率为 1540 mm/a。
In this paper, a soluble Mg-Gd2.94-x-Yx-Ni0.94 (x=0, 0.98, 1.47 at.%) alloy for oil extraction was prepared by regulating the Y/Gd atomic ratio on the basis of the total amount of rare earth elements remained unchanged. The microstructure evolution and the mechanical and degradation mechanisms of the alloys were analyzed. The results show that the as-cast Mg-Gd-Ni alloy consists of α-Mg, LPSO phase, Mg5Gd phase and Gd-rich particle phase, and the Mg-Gd-Y-Ni alloy consists of α-Mg, LPSO phase, Mg5RE phase and RE-rich particle phase. With the gradual increase of Y/Gd atomic ratio, both mechanical and degradation properties of the alloy showed a decreasing trend followed by an increasing trend. When the atomic ratio of Y/Gd is 1, the alloy has the best mechanical and degradation properties with tensile strength of 245 MPa, yield strength of 118 MPa, elongation of 5.0%, and degradation rate of 1540 mm/a in 3.0 wt.% KCl solution at 25 ℃.
董立春、潘远朗
材料科学金属学、热处理铸造
化学工程Mg-Gd-Y-Ni合金力学性能降解性能
hemical EngineeringMg-Gd-Y-Ni alloyMechanical propertiesDegradation properties
董立春,潘远朗.铸态Mg-Gd-Y-Ni合金力学与降解性能研究[EB/OL].(2023-05-18)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/202305-111.点此复制
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