氧化钇含量对W-ZrC复合材料显微组织和抗热冲击性能的影响  

Effect of Y_(2)O_(3) Content on the Microstructure and Transient Heat Loading Performance of W-ZrC Composite

作　　者：钟铭[1] 都娟 周张健[1] ZHONG Ming;DU Juan;ZHOU Zhangjian(School of Material Science and Engineering,University of Science&Technology Beijing,Beijing 100083,China;Southwestern Institute of Physics,Chengdu 610225,Sichuan,China)

机构地区：[1]北京科技大学材料学院,北京100083 [2]核工业西南物理研究院,四川成都610225

出　　处：《中国钨业》2022年第3期38-45,共8页China Tungsten Industry

基　　金：核工业西南物理研究院“西物创新行动”(202103XWCXRC002)。

摘　　要：钨是聚变堆面向等离子体材料的主要候选材料,抗瞬态热冲击能力是其重要的服役性能。为了提高钨的抗热冲击性能,以W-0.5%ZrC复合材料为基体,采用放电等离子烧结制备了具有不同氧化钇含量的W-ZrC-Y复合材料,采用扫描电镜和透射电镜对氧化钇含量与晶粒组织之间的关系进行研究,通过显微硬度和抗弯强度测试对不同氧化钇含量样品的力学性能进行比较,采用高能电子束对其瞬态热冲击行为进行测试。结果表明,钇添加含量为0.5%时,所制备的复合材料具有最为均匀的细晶组织,其弯曲强度最高,同时具有最高的抗瞬态热冲击开裂阈值。Tungsten is the main candidate material for plasma materials of fusion reactors,and its transient thermal shock resistance is an important service performance.In order to improve the thermal shock resistance of tungsten,W-ZrC-Y composites with different addition of yttrium content were prepared by spark plasma sintering with W-0.5%ZrC composites as the matrix.It is found that uniformly distributed yttrium oxide particles formed after sintering.The relationship between the addition content of yttrium and grain structure was studied by scanning electron microscope and transmission electron microscope.The mechanical properties of samples with different yttrium content were compared by microhardness and bending strength test,and the transient thermal shock behavior was tested by high energy electron beam.The results show that when the yttrium content is 0.5%,the prepared composite has the most uniform fine-grained structure,the highest bending strength and the highest threshold of transient thermal shock cracking resistance.

关 键 词：钨 面向等离子体材料 氧化钇 抗热冲击性能 

分 类 号：TG135[一般工业技术—材料科学与工程]