Abstract This letter shows the chemical compatibility between LnZ and YSZ after heat treatment at high temperatures. It was found that LnZ would react with YSZ, and a reaction zone with relatively large grains formed after high temperature treatment, which would usually destroy the structural and compositional stability of the composite specimens. The reaction between LnZ and YSZ was caused by the element interdiffusion due to the chemical potential difference, and a higher sintering temperature would lead to a higher reaction rate. The common tangent law was used to analyze the phenomenon, and a solution was proposed to solve the issue.

中文翻译：

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Ln2Zr2O7（Ln = Nd、Sm、Gd）与高温退火后的四方氧化钇稳定氧化锆之间的化学相容性

摘要 这封信显示了高温热处理后 LnZ 和 YSZ 之间的化学相容性。发现LnZ会与YSZ反应，高温处理后会形成较大晶粒的反应区，这通常会破坏复合试样的结构和成分稳定性。LnZ和YSZ之间的反应是由化学势差引起的元素相互扩散引起的，较高的烧结温度会导致较高的反应速率。利用公切定律对该现象进行了分析，并提出了解决该问题的方案。