Thermal conductivity measurement of the interaction layer between UMo and Al produced by high-energy heavy ion irradiation
Thermal conductivity measurement of the interaction layer between UMo and Al produced by high-energy heavy ion irradiation
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DOI：
10.1016/j.jnucmat.2020.152262
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发表时间：
2020-10
影响因子：
3.1
通讯作者：
Y. Miao;L. Nimmagadda;Manjunath C. Rajagopal;K. Mo;Jingyi Shi;B. Ye;L. Jamison;Y. Kim;W. Petry;S. Sinha;A. Yacout
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文献类型：
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作者：
Y. Miao;L. Nimmagadda;Manjunath C. Rajagopal;K. Mo;Jingyi Shi;B. Ye;L. Jamison;Y. Kim;W. Petry;S. Sinha;A. Yacout
在这里，我们报告的第一个直接热导率测量结果的铝UMo相互作用层（IL），这是通常观察到的UMo/铝分散燃料板照射下。研究的IL是通过在180 ℃下用80 MeV的I离子以高达3.03× 1017 ions/cm 2的能量密度照射Al涂覆的UMo衬底形成的。微观结构表征表明，诱导IL是非晶态的约（U 0.8，Mo 0.2）Al 5.3的化学计量比，这是类似于堆内照射下形成的。聚焦离子束（FIB）被用来制备九个不同长度的样品从IL，可以悬挂在一个微加工设备的热导率测量。测量的IL的热导率值显着低于原始Umo燃料和Al的值。Al-Umo IL的成功测量为研究和测试反应堆转化应用的Umo/Al分散燃料的开发和鉴定提供了有价值的信息，并进一步证明了在核燃料研究中利用吊桥方法的前景。
Here, we report the first direct thermal conductivity measurement results for Al–UMo interaction layer (IL), which is typically observed in UMo/Al dispersion fuel plates under irradiation. The investigated IL was formed by irradiating Al coated UMo substrate using 80 MeV iodine ions at 180∘ C up to 3.03× 10 17 ions/cm 2 fluence. Microstructural characterization indicated that the induced IL is amorphous with an approximately (U 0.8, Mo 0.2) Al 5.3 stoichiometry, which is similar to that formed under in-pile irradiation. Focused ion beam (FIB) was used to prepare nine specimens of various lengths from the IL that could be suspended across a microfabricated device for thermal conductivity measurement. The measured thermal conductivity values of the IL were significantly lower than the values for both the original UMo fuel and the Al. The successful measurement of the Al–UMo IL provides valuable information for the development and qualification of UMo/Al dispersion fuels for research and test reactor conversion applications, and further demonstrates the promising capabilities of utilizing the suspended bridge method in nuclear fuel research.