选用Zn(l)/Zr(s)液固反应偶研究了其界面反应和反应层生成相, 重点考察了反应层在固态基底直角部位的生长形态。研究结果表明, 在450℃和530℃时, 反应层依次由Zn3Zr相、Zn39Zr5相和Zn22Zr相组成;温度升高至580℃时, 反应层只有Zn22Zr相和Zn39Zr5相存在。反应层厚度随温度升高和时间的延长而增加, 近似呈抛物线生长规律;Zn22Zr层在反应初期迅速增长, 达到平衡后随温度升高和时间延长基本不变。反应层在直角部位发生不完全断裂, 呈放射状生长, 并未形成十字形生长。
Interfacial reactions between liquid Zn and Zr substrate were investigated in this paper using Zn(liquid)/Zr(solid) reaction couples. The results showed that when the reaction couples reacted at 450℃and 530℃, the reaction layers consisted of Zn3Zr, Zn39Zr5 and Zn22Zr in sequence. When the reaction couples reacted at 580℃, only Zn22Zr and Zn39Zr5 were formed at the interface. The thickness of the reaction layers increased with the growth of reaction temperature and time. The growth kinetics of the interfacial reaction layer satisfied a parabolic relationship. The thickness of the Zn22Zr reaction layer increases quickly at the initial stage and keeps invariant with the growth of reaction temperature and time when the reaction reaches equilibrium. Shrinking of the reaction layers at the corners is observed in the Zn(l)/Zr(s) reaction couples, but it does not exhibit a typical cruciform pattern.
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