粉末冶金法制备多孔U-10%Mo合金及其微观组织结构分析  

Preparation of Porous U-10%Mo Alloy by Powder Metallurgy and Its Microstructure Characterization

作　　者：贾建平[1] 王志刚[2] 陈淼[1] 王锡胜[2] 张鹏程[1] 武胜[1] 

机构地区：[1]表面物理与化学重点实验室,四川绵阳621907 [2]中国工程物理研究院,四川绵阳621900

出　　处：《原子能科学技术》2013年第2期295-298,共4页Atomic Energy Science and Technology

摘　　要：U-Mo合金是近期广受关注的金属型核燃料材料之一,它具有良好的抗辐照肿胀能力。分析认为,若能在U-Mo合金中加入一定的孔隙,可起到容纳裂变气体以进一步提高其抗辐照肿胀性能的作用。本文利用冷等静压-真空固相烧结的粉末冶金方法制备低密度U-10%Mo合金材料,探索了烧结工艺对产品密度的影响规律。实验得到了一系列不同孔隙度的U-Mo合金材料,利用金相显微镜(OM)、扫描电子显微镜(SEM)对其微观结构进行了表征。结果证明,样品在1 100℃下烧结时密度随烧结时间的延长而提高,因此可通过改变烧结时间控制其孔隙率。U-Mo alloy is one of candidates of metallic fuel for advanced nuclear reactor due to its good irradiation behavior. Reasonably analysis suggests that the irradiation swell of U-Mo alloy can be decreased by introducing homogenously distributed voids, because they can accommodate gaseous fission products. The process of preparing low density U-Mo alloy by powder metallurgy was described, including preparing low density bulk materials by pressing and vacuum sintering. A serial of U-10%Mo alloys with different densities were obtained and the microstructure was analyzed by optical microscopy （OM） and scanning electron microscopy （SEM）. It is proved that the density of sample increases with sinister time under 1 100 ℃. The void ratio can be controlled by adjusting sinister process conveniently.

关 键 词：U—Mo合金 粉末冶金 微观结构 

分 类 号：TG113.12[金属学及工艺—物理冶金]