Frost-heave phenomena of 4He on porous glasses.
Frost-heave phenomena of 4He on porous glasses.
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4He 在多孔玻璃上的冻胀现象。
DOI：
10.1103/physrevb.40.6581
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Eguchi
中科院分区：
文献类型：
--
作者：
Hiroi;Mizusaki;Tsuneto;Hirai;Eguchi
在多孔玻璃上观察到$^{4}\ mathm {He}$的冻胀现象。主要研究了冻胀的静态特性，在平衡状态下测量了孔隙中体积固体和液体边界上的压力跳变，这是孔隙中液体从体积熔化温度过冷量的函数。这些测量是在几个恒定压力下进行的，范围为26\char21{}60 bar，温度高于1.3 K。在28.5 bar以上得到的结果与假设固液相化学势相同推导出的修正Clausius-Clapeyron方程符合得很好。当压力低于28 bar时，测得的最大冻胀压力小于修正Clausius-Clapeyron方程的预测值。对于26.1巴的样品，几乎没有观察到霜胀效应的迹象。
We observed the frost-heave phenomena of $^{4}\mathrm{He}$ on porous glasses. The static property of the frost heave was mainly studied, where the pressure jump across the boundary between bulk solid and liquid in the pores was measured in equilibrium as a function of the amount of supercooling of liquid in the pores from the bulk melting temperature. These measurements were performed at several constant pressures in the range 26\char21{}60 bars and at temperatures above 1.3 K. The results obtained above 28.5 bars were in good agreement with the modified Clausius-Clapeyron equation deduced by assuming that the chemical potential in the solid and liquid phase is the same. When the pressure was below 28 bars, the measured maximum frost-heave pressure became less than the prediction of the modified Clausius-Clapeyron equation. For a sample at 26.1 bars almost no indication of the frost-heave effect was observed.