【摘要】 应用OM、SEM、EDAX和AES对在一定压力下不同温度加热后的UO₂/Zr间结合界面进行了微观分析。结果表明,在750℃以上经不同时间加热后,UO₂/Zr间发生了化学反应,反应层由α-Zr（O）+富轴的（U,Zr）相;α-Zr（O）+（U,Zr）δ相和α-Zr（O）组成。UO₂/Zr在700℃延长加热时间,相互间也会发生反应。Zr或Zr合金在700℃以上应避免直接与UO₂相接触。此外,对反应层的形成过程进行了讨论。更多还原

【Abstract】 The microstructure of bonded interface between UO₂ and Zr after heated under certain pressure and different temperature has been analysed by means of OM, SEM, EDAX and AES. The results indicate that the interface between UO₂ and Zr have reacted in the temperature range 750—850℃. The reaction zone is composed of three different layers, that is, the α-Zr（O）and rich uranium （U,Zr） ally （the first layer）, α-Zr（O） and （U,Zr） δ phase （the second layer） and the α-Zr（O） （the third layer）. It has been pointed out that the interracial reaction between UO₂ and Zr can occur if prolonging the heated time at 700℃. A direct contact between UO₂ and Zr should be avoided at 700℃ or over this temperature. Besides this, the formation process of reaction layers is also discussed in this paper.更多还原