The hydrogen permeation technique in the surface-limited regime (SLR) was first used to study the isothermal decomposition of zirconium hydride. It is shown that under isothermal conditions, the hydrogen terminal solid solubility in the α-phase for hydride precipitation (TSSp) and dissolution (TSSd) differ only by 6%, in contrast to the 20–30% indicated in the available literature. It is demonstrated that even the minimum heating/cooling rate (1 C/min) used in the traditional methods of studying TSSp and TSSd is too high to exclude the effect of kinetics on the results obtained.

中文翻译：

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氢化锆等温分解的动力学：沉淀和溶解的最终固体溶解度

首先采用表面受限状态下的氢渗透技术（SLR）研究氢化锆的等温分解。结果表明，在等温条件下，氢化物沉淀（TSSp）和溶出度（TSSd）在α相中的氢末端固溶度仅相差6％，而现有文献中仅为20％至30％。结果表明，即使在传统的研究TSSp和TSSd的方法中使用的最小加热/冷却速率（1 C / min）也太高了，无法排除动力学对所得结果的影响。