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氢化-去氢化法制备铀锆合金粉体
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国家自然基金项目 (91226203);国家ITER专项 (2012GB106004)


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    摘要:

    铀锆合金粉体是粉末冶金法制备核反应堆用铀合金燃料的原料。采用氢化-去氢化法制备了铀锆合金粉末,用XRD及SEM进行了微观形貌的观察。结果显示,制粉前的预处理相当重要,直接影响铀锆合金的氢化性能;随着氢化-去氢化次数的增加,吸氢量随之增加,且活化10次后,吸氢量达到稳定值;在650 ℃下的去氢化处理后对粉体的XRD及SEM形貌观察表明,U-10%Zr(质量分数)粉体为单纯的g相,没有相的转变,随着氢化-去氢化次数的增加,中间颗粒的粒度(100~150 mm)分布所占的比例逐渐升高

    Abstract:

    U-10wt%Zr alloy powders are the raw material of the uranium alloy fuels by a powder metallurgic process in nuclear reactor. In this work, U-10wt%Zr powders were prepared by a hydriding-dehydriding process, and the prepared powders were studied by XRD and SEM. The results show that the pretreatement of U-10wt%Zr alloy is a key issue to obtain U-10wt%Zr powders. During the hydriding-dehydriding process, the absorbed hydrogen of U-10wt%Zr alloy increases with the cycle number increasing. After 10 cycles, the absorbed hydrogen reaches a stable value. U-10wt%Zr alloy were heated to desorb the hydrogen at 650 oC, and then U-10wt%Zr alloy powders were obtained. XRD results show that U-10wt%Zr alloy powders are still g phase, indicating that during preparation, the phase transformation process does not occur. SEM observation suggests that the particle shape of U-10 wt%Zr alloy powders is nonuniform, but particle size is less than 150 mm, while some are below 100 mm

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熊义富,张鹏程,敬文勇,把静文,张桂凯.氢化-去氢化法制备铀锆合金粉体[J].稀有金属材料与工程,2014,43(11):2792~2795.[Xiong Yifu, Zhang Pengcheng, Jing Wenyong, Ba Jingwen, Zhang Guikai.[J]. Rare Metal Materials and Engineering,2014,43(11):2792~2795.]
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  • 收稿日期:2013-11-18
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  • 在线发布日期: 2015-04-07
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