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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Hydrogen permeability and microstructure of rapidly quenched Nb-TiNi alloys
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Hydrogen permeability and microstructure of rapidly quenched Nb-TiNi alloys

机译：快速淬火Nb-TiNi合金的氢渗透性和组织

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摘要

Effect of annealing on structure, microstructure and hydrogen permeability of rapidly quenched Nb_(30)Ti_(35)Ni_(35) and Nb_(40)Ti_(30)Ni_(30) alloy ribbons were investigated by X-ray diffractometry (XRD), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and the gas flow method. Crystalline (Nb, Ti) and TiNi phases coexisted with the amorphous phases in the as-quenched Nb_(30)Ti_(35)Ni_(35) alloy, while only crystalline (Nb, Ti) and TiNi phases were formed in the as-quenched Nb_(40)Ti_(30)Ni_(30) alloy. Both the as-quenched alloys were too brittle to measure their hydrogen permeability, but they became ductile by annealing above 1173 K and showed the microstructure consisting of the crystalline (Nb, Ti) phase embedded in the crystalline TiNi matrix. The volume fraction of the (Nb, Ti) phases in the Nb-TiNi alloys increased with increasing Nb content. Hydrogen permeability at 673 K, i.e. ?_(673?) of the crystalline Nb_(30)Ti_(35)Ni_(35) and Nb_(40)Ti_(30)Ni_(30) alloys was 1.1 × 10~(-8) and 1.9 × 10~(-8) (molH_2/m/s/Pa~(0.5)), respectively, which were comparable with that of Pd. The present work has clearly demonstrated that the rapid quenching technique and subsequent annealing process are useful and attractive method for the preparation of hydrogen permeable Nb-TiNi alloy membrane.
机译：X射线衍射（XRD）研究了退火对Nb_（30）Ti_（35）Ni_（35）和Nb_（40）Ti_（30）Ni_（30）合金薄带的组织，显微组织和氢渗透性的影响。 ，扫描电子显微镜（SEM），差示扫描量热法（DSC）和气流法。淬火后的Nb_（30）Ti_（35）Ni_（35）合金中的非晶态相共存于结晶态（Nb，Ti）和TiNi相，而在初始状态下仅形成了晶态（Nb，Ti）和TiNi相。淬火Nb_（40）Ti_（30）Ni_（30）合金。两种淬火后的合金都太脆，无法测量其氢渗透性，但它们在1173 K以上退火后变得易延展，并显示出由嵌入TiNi基体中的Nb，Ti相组成的微观结构。 Nb-TiNi合金中（Nb，Ti）相的体积分数随Nb含量的增加而增加。 Nb_（30）Ti_（35）Ni_（35）和Nb_（40）Ti_（30）Ni_（30）合金在673 K时的氢渗透率，即α_（673？）为1.1×10〜（-8 ）和1.9×10〜（-8）（molH_2 / m / s / Pa〜（0.5）），与Pd相当。本工作已经清楚地表明，快速淬火技术和随后的退火工艺是制备氢可渗透的Nb-TiNi合金膜的有用且有吸引力的方法。

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