کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1451307 | 988767 | 2005 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermodynamics of volume-collapse transitions in cerium and related compounds Thermodynamics of volume-collapse transitions in cerium and related compounds](/preview/png/1451307.png)
We present a non-linear elastic model of a coherent transition with discontinuous volume change in an isotropic solid. The model reproduces the anomalous thermodynamics typical of coherent equilibrium including intrinsic hysteresis (for a pressure driven experiment) and a negative bulk modulus. The novelty of the model is that the statistical mechanics solution can be easily worked out. We find that coherency leads to an infinite-range density–density interaction, which drives classical critical behavior. The pressure width of the hysteresis loop shrinks with increasing temperature, ending at a critical point at a temperature related to the shear modulus. The bulk modulus softens with a 1/2 exponent at the transition even far from the critical point. Many well known features of the phase diagram of Ce and related systems are explained by the model.
Journal: Acta Materialia - Volume 53, Issue 19, November 2005, Pages 5183–5188