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贮氢合金是一种重要的功能材料.在多种贮氢合金中,AB_5型稀土系贮氢合金的应用最为广泛.本文用正电子湮没技术(PAT)对AB_5型混合稀土贮氢合金的缺陷进行了研究,并结合X射线衍射(XRD)测试、循环伏安(CV)测试以及合金容量的测定,对合金的结构及性能进行了研究.结果表明,合金微观缺陷的存在能大幅度提高合金的性能.
Hydrogen storage alloy is an important functional material.In many hydrogen storage alloys, AB_5 type rare earth hydrogen storage alloy is the most widely used.In this paper, positron annihilation (PAT) was used to study the defects of AB_5 mixed rare earth hydrogen storage alloy The structure and properties of the alloy were investigated by X-ray diffraction (XRD), cyclic voltammetry (CV) and alloy volumetric measurements.The results show that the existence of micro-defects in the alloy can greatly improve the alloy Performance.