图1(d)的XRD谱图显示,Zn-0.8Li合金在铸态和轧制态均含有Zn和β-LiZn4相,在Zn-0.7Li合金[6]中也发现了这两种相。根据Zn- Li二元相图,β-LiZn4在65◦C的热力学平衡冷却条件下分解为Zn和α-LiZn4。没有α-LiZn4相在铸态合金中检测到可能是由于冷却速度比平衡状态快得多。100的热轧温度是35◦C比分解温度高。热轧后,这些盘子被水淬火,水会冻结到室温。
XRD patterns in Fig. 1(d) show that Zn-0.8Li alloy either in the as-cast or in the as-rolled status contains Zn and β-LiZn4 phases, both of which have also been found in Zn-0.7Li alloy [6]. According to Zn-Li binary phase diagram, decomposition of β-LiZn4 into Zn and α-LiZn4 happens at 65◦C during cooling in thermodynamic equilibrium condition. No α-LiZn4 phase is detected in the as-cast alloy probably due to a cooling rate much faster than that in the equilibrium condition. The warm rolling temperature of 100◦C is 35◦C higher than the decomposition temperature. After the warm rolling, the plates are water quenched, which freezes β-LiZn4 down to room temperature.