【作者】 赵建龙； 王雯； 吴伦强；

【Author】 Jianlong Zhao;Wen Wang;Lunqiang Wu;China Academy of Engineering Physics;

【机构】 中国工程物理研究院；

【摘要】 锆金属具有硬度高、韧性强、热膨胀系数小、耐腐蚀性能优异、低温塑性好的特性。锆与铀合金化可改善铀金属性能,细化晶粒,提高铀金属的韧性,增强其耐腐蚀性。U-Zr合金是近年来开发的重要的新型工程材料,在未来新型混合能源堆的设计、氢吸附、耐腐蚀及热循环中稳定性方面都会有较大用途。而Zr的含量是决定U-Zr合金材料性能的关键指标,由于能量色散X射线荧光光谱法具有制样简单、快速、准确等优点,因此选用这种方法测定了U-Zr合金Zr含量,其扩展不确定度(k=2)不大于3.2%。测量参考标样的相对偏差不大于1.0%。在较长时间内,本方法对U-Zr试样重复测量结果的相对标准偏差不大于1.0%。结果表明本方法简便、快速、准确,适用于Zr含量在5%~18%范围的U-Zr合金样品的Zr含量测定。更多还原

【Abstract】 The zirconium metals are featured in high rigidity and toughness, minor thermal expansion coefficients, excellent corrosion-resistance and plasticity. When alloying with zirconium, the performance of the uranium metals are highly enhanced in terms of crystal size, toughness and corrosion-resistance. The U-Zr alloys are recently developed materials which are potential in the design of the latest reactor, the hydrogen adsorption, and the stability in thermal cycles. The content of Zr is the key of the performance of U-Zr alloy, making the measurement of the content important. Energy diffracted XRF is a powerful technique for the measurement of the content of Zr in U-Zr alloy, and the extended uncertainty are smaller than 3.2%. In this method, the RSD of the repeated measurement of U-Zr alloy is as good as 1%. The method is simple, fast, accurate, and particular useful in the measurement of Zr with content of 5~18% in U-Zr alloy.更多还原