Fe/Cr比对Zr(Fe,Cr)2吸氢性能的影响

Effect of Fe/Cr Ratio on the Hydrogen Absorption Performance of Zr(Fe,Cr)2

摘要:

参照锆合金中的第二相成分，熔炼2种不同Fe/Cr比的Zr(Fe,Cr)2 (Fe/Cr=2和0.5)和ZrCr2（Fe/Cr=0）3种试验合金，对它们进行压力-成分-温度（P-C-T）测试和吸放氢动力学测试。同时用XRD对360 ℃吸氢前后的样品进行物相分析。实验结果表明，这3种合金在50，200，360 ℃ 3个温度下，均有吸氢量随Fe/Cr比值的降低而增加的现象。另外，在360 ℃，4 MPa氢气气氛中测试时，这3种不同合金的可逆吸放氢量和吸放氢速度随Fe/Cr比的降低而增加。XRD测试表明，在360 ℃吸氢后并没有氢化物生成。

Abstract:

Referring to the compositions of second phase particles (SPPs) in zirconium alloys, three kinds of experimental Zr(Fe,Cr)2 alloy with different Fe/Cr ratio i.e. Fe/Cr=2 and 0.5 for Zr(Fe,Cr)2 and Fe/Cr=0 for ZrCr2 were prepared. Then the pressure-composition- temperature (P-C-T) curves and kinetic curves of hydrogen absorbing and desorbing were obtained. XRD was employed to analyze the structures of the specimens before and after hydrogen absorbing at 360 oC. Results show that the amount of hydrogen absorption of the three alloys all increases with the decrease of Fe/Cr ratio at 50, 200 and 360 oC. In addition, the amount and rate of reversible hydrogen absorption and desorption of the three alloys all increase with the decrease of Fe/Cr ratio when tested in 360 oC, 4 MPa H2 atmosphere. X-ray diffraction analysis indicates that no hydride is detected after they absorb hydrogen at 360 oC.