Hysteresis in the Palladium—Hydrogen System
Hysteresis in the Palladium—Hydrogen System
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DOI：
10.1063/1.1734384
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发表时间：
1963-08
影响因子：
4.4
通讯作者：
N. A. Scholtus;W. Hall
中科院分区：
文献类型：
--
作者：
N. A. Scholtus;W. Hall
当氢溶于钯中时，首先形成α相；β相在此成核生长。由于伴随着α - β转变的体积变化很大，当α相被拉伸超过其弹性极限时，会发生塑性变形。因此，在α相的压缩应力作用下，β相的吸附伴随着β相的生长，而解吸发生在塑性变形固体的β相上。由于这不是一个热力学可逆过程，因此产生了滞后。结果表明，等温线的吸收环可以由解吸环和金属的屈服强度计算得到。提出了对早期理论的一些重新解释。
When hydrogen is dissolved in palladium, the α phase forms first; the β phase nucleates and grows in this. Because of the large volume change which accompanies the α‐to‐β transition, plastic deformation of the α phase occurs as it is stretched beyond its elastic limit. Hence, absorption is accompanied by growth of the β phase under compressive stress of the α phase, but desorption take place from the β phase of the plastically deformed solid. Since this is not a thermodynamically reversible process, hysteresis results. It is shown that the absorption loop of the isotherm can be calculated from the desorption loop and the yield strength of the metal. Some reinterpretation of earlier theories is presented.