Crystal structure of high-Zr inclusions in an alloy containing U, Pu, Np, Am, Zr and rare-earth elements

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• 作者：Dawn E. Janney ; ^{dawn.janney@inl.gov" class="auth_mail} ; J. Rory Kennedy ^{rory.kennedy@inl.gov" class="auth_mail} ; J.W. Madden ^{james.madden@inl.gov" class="auth_mail} ; T.P. O&rsquo ; Holleran ^{thomas.oholleran@inl.gov" class="auth_mail}
• 刊名：Journal of Nuclear Materials
• 出版年：May 2014
• 年：2014
• 卷：448
• 期：1-3
• 页码：109-112
• 全文大小：581 K

文摘

Researchers commonly observe high-Zr inclusions in actinide–Zr alloys. As there is very little published data on the crystal structures of these inclusions, it has generally been assumed that the inclusions were impurity-stabilized 伪-Zr. However, new electron-diffraction data from two high-Zr inclusions in an alloy containing U, Pu, Np, Am, Zr, and rare-earth elements show that these inclusions are not 伪-Zr (which has a hexagonal structure) but, instead, have a face-centered cubic structure. This data is unique in that it combines single-crystal diffraction patterns and microchemical analyses from individual inclusions.

More data on other high-Zr inclusions is clearly required. However, the present results suggest that caution is needed in assuming that all high-Zr inclusions in actinide–Zr alloys are 伪-Zr.