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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >The relationship between (Mg,Zn)_3RE phase and 14H-LPSO phase in Mg-Gd-Y-Zn-Zr alloys solidified at different cooling rates
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The relationship between (Mg,Zn)_3RE phase and 14H-LPSO phase in Mg-Gd-Y-Zn-Zr alloys solidified at different cooling rates

机译：不同冷却速率下凝固的Mg-Gd-Y-Zn-Zr合金中（Mg，Zn）_3RE相与14H-LPSO相的关系

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摘要

Mg-10Gd-3Y-1.8Zn-0.5Zr(wt.%) (GWZ1032K) alloys are prepared by permanent mold casting at cooling rate of 5 K/s, or further prepared by melt spinning at cooling rate of 10~4 K/s, or by slow solidification at different cooling rates (0.5 K/s, 0.1 K/s, 0.01 K/s and 0.005 K/s). (Mg,Zn)_3RE phase and 14H-LPS0 structure in alloys under different conditions are measured by XRD and observed under electron microscope. It shows there is no IPSO structure in the alloy prepared by melt spinning at cooling rate of 10~4 K/s. In the alloy prepared by permanent mold casting at cooling rate of 5 K/s, fine lamellar 14H-LPS0 structure appears in the matrix nearby grain boundaries. With the cooling rates slowing down from 0.5 K/s to 0.005 K/s, (Mg,Zn)_3RE phase is gradually replaced by 14H-LPSO phase at grain boundaries, and lamellar 14H-LPS0 structure also propagates in á-Mg matrix. Both (Mg,Zn)_3RE phase and 14H-LPS0 phase are present at grain boundaries in the alloys solidified at cooling rates of 0.5 K/s and 0.1 K/s.
机译：Mg-10Gd-3Y-1.8Zn-0.5Zr（wt。％）（GWZ1032K）合金是通过永久铸模以5 K / s的冷却速率制备的，或者进一步通过熔融纺丝以10〜4 K / s的冷却速率制备的s或通过在不同的冷却速率（0.5 K / s，0.1 K / s，0.01 K / s和0.005 K / s）下缓慢固化。用X射线衍射仪测量了不同条件下合金中的（Mg，Zn）_3RE相和14H-LPS0结构，并在电子显微镜下观察。结果表明，在冷却速度为10〜4 K / s的情况下，通过熔融纺丝制备的合金中没有IPSO结构。在以5 K / s的冷却速度通过永久铸模制备的合金中，在晶界附近的基体中出现了细薄的层状14H-LPS0结构。随着冷却速率从0.5 K / s降低至0.005 K / s，（Mg，Zn）_3RE相在晶界处逐渐被14H-LPSO相取代，并且层状14H-LPS0结构也在á-Mg基质中传播。 （Mg，Zn）_3RE相和14H-LPS0相均存在于以0.5K / s和0.1K / s的冷却速率凝固的合金中的晶界处。

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