锻造态W-1%La_2O_3合金的纳米颗粒相分析  

Phase Analysis of Nano-sized Particles in As-forged W-1%La_2O_3 Alloy

作　　者：许志强[1] 沈寅忠[1] 崔凯[1] 季波[1] 郭新秋[1] 

机构地区：[1]上海交通大学,上海200240

出　　处：《稀有金属材料与工程》2016年第10期2573-2577,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51034011);国家磁约束核聚变能研究专项(2011GB113001);国家科技重大专项(2011ZX06004-009)

摘　　要：利用透射电子显微镜对锻造状态W-1%La_2O_3合金的相,特别是纳米尺度颗粒相,进行了分析。共发现8种颗粒相,包括：3种类型的La_2O_3相;2种类型的WO_3相;W_3O_8相;La_（0.14）WO_3相以及（La_2O_3）_5WO_3相。其中La_2O_3、WO_3和W_3O_8为合金中主要的纳米颗粒相,这些颗粒的尺寸主要集中在20～100 nm范围内。同时讨论了W-1%La_2O_3合金颗粒相的可能形成过程。W–1% La2O3 alloy is considered as one of the candidate material for plasma-facing components of future fusion reactors. The phases of as-forged W–1% La2O3 alloy, especially the nano-sized particle phases, have been investigated using transmission electron microscopes．Eight kinds of particle phases have been found in the alloy. They are： three kinds of La2O3 phases; two kinds of WO3 phases; W3O8 phase; La0.14WO3 phase and （La2O3）5WO3 phase. La2O3, WO3 and W3O8 are dominant nano-sized phases in the alloy. These particles have sizes ranging from about 20 nm to about 100 nm. The possible formation processes of these particle phases are also discussed.

关 键 词：W-1%La2O3合金 锻造态 纳米颗粒 透射电子显微镜 

分 类 号：TG146.411[一般工业技术—材料科学与工程]