Hydrogen permeation in the metallic glass Fe40Ni40P14B6
Hydrogen permeation in the metallic glass Fe40Ni40P14B6
复制标题
金属玻璃 Fe40Ni40P14B6 中的氢渗透
DOI：
10.1016/0022-3093(82)90188-0
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
H. H. Johnson
中科院分区：
文献类型：
--
作者：
R. Lin;H. H. Johnson
用电化学方法测量了在313~353K和105~103Pa范围内，氢从气相向金属玻璃Fe40Ni40P14B6(Metglas 2826)的渗透。样品表面涂有一层薄薄的电沉积钯，以消除氢进入和退出的表面阻抗。在所研究的温度和压力范围内，观察到Sievert定律的行为。与由Fick扩散理论得到的渗透瞬变曲线非常吻合。用最小二乘法拟合出的渗透系数与由时滞测量得到的扩散系数吻合较好。在所研究的浓度范围内，扩散系数与输入氢浓度无关。测定了渗透系数2.2 4×10 16exp[(4 8.99±2.93)kJ/m ol]/RT}原子H/mS Pa1 2，扩散系数8.5 2×10−7exp[(−4 7.0 7±1.6 3)kJ/m ol]/RT}m2/S，溶解度2.6 2×10 2 2exp[(−1.92±4.5 6)kJ/m ol]/RT}原子H/m3Pa1 2。573K下一小时的退火处理降低了氢在金属玻璃中的渗透率和扩散系数。
Hydrogen permeation from the gas phase through the metallic glass Fe 40 Ni 40 P 14 B 6 (Metglas 2826) was measured with the electrochemical technique over 313 to 353K and 10 5 to 10 3 Pa. Specimen surfaces were coated with a thin layer of electrodeposited palladium to eleminate surface impedances to hydrogen entry and exit. Sievert's law behavior was observed over the temperature and pressure ranges studied. An excellent fit to the permeation transients as obtained from Fick's diffusion theory. Diffusivities derived from least squares fitting of permeation trasients were in good agreement with those obtained from time lag measurements. Within the concentration range studied, diffusivity was found to be independent of input hydrogen concentration. The expressions for the permeability coefficient, 2.24× 10 16 exp {[(48.99±2.93) kJ/mol]/RT} atom H/ms Pa 1 2, the diffusivity 8.52× 10− 7 exp {[(− 47.07±1.63) kJ/mol]/RT} m 2/s, and the solubility, 2.62× 10 22 exp {[(− 1.92±4.56) kJ/mol]/RT} atom H/m 3 Pa 1 2, were determined. An annealing treatment at 573K for one hour decreases bot the permeability and diffusivity of hydrogen in the metallic glass.