功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2014年
17期
17029-17033
,共5页
ODS 钢%纳米氧化物颗粒%层析原子探针
ODS 鋼%納米氧化物顆粒%層析原子探針
ODS 강%납미양화물과립%층석원자탐침
ODS steels%nanoparticles%APT
采用透射电镜和层析原子探针(APT)分析了9Cr-ODS 钢中纳米氧化物颗粒成分和结构.研究发现,氧化物颗粒成分与其大小有一定的关系,可将其归纳为3类：(1)氧化物＜5nm ,m (Y)∶m (Ti)＜1,可能是非整比化合物；(2)5~10 nm＜氧化物尺寸＜40 nm,m (Y)∶m (Ti)≈1,可能是 Y2 Ti2 O 7；(3)氧化物＞40 nm,为 TiO 2.Cr 在氧化物周围偏析形成壳状结构.
採用透射電鏡和層析原子探針(APT)分析瞭9Cr-ODS 鋼中納米氧化物顆粒成分和結構.研究髮現,氧化物顆粒成分與其大小有一定的關繫,可將其歸納為3類：(1)氧化物＜5nm ,m (Y)∶m (Ti)＜1,可能是非整比化閤物；(2)5~10 nm＜氧化物呎吋＜40 nm,m (Y)∶m (Ti)≈1,可能是 Y2 Ti2 O 7；(3)氧化物＞40 nm,為 TiO 2.Cr 在氧化物週圍偏析形成殼狀結構.
채용투사전경화층석원자탐침(APT)분석료9Cr-ODS 강중납미양화물과립성분화결구.연구발현,양화물과립성분여기대소유일정적관계,가장기귀납위3류：(1)양화물＜5nm ,m (Y)∶m (Ti)＜1,가능시비정비화합물；(2)5~10 nm＜양화물척촌＜40 nm,m (Y)∶m (Ti)≈1,가능시 Y2 Ti2 O 7；(3)양화물＞40 nm,위 TiO 2.Cr 재양화물주위편석형성각상결구.
The composition and the size of nanoparticles in the 9CR-ODS has been investigated by STEM-EDS and atom probe tomography.According to the correlation between m (Y)∶m (Ti)ratio and nanoparticles size in 9Cr-ODS steel,three types of nanoparticles were observed including:(1 )small sized nanoparticles less than 5 nm,m (Y)∶m (Ti)< 1,indicating non-stoichiometric nanoparticles,(2 )intermediate sized nanoparticles, ranging from 5-40 nm,m (Y)∶m (Ti)≈ 1.0,indicating Y2 Ti2 O 7 ,(3)large sized nanoparticles more than 40 nm,indicating TiO 2 .The nanoparticles was measured by proximity histogram (proxigram)method,exhibiting core shell structure with a Y-Ti-O core and a Cr shell.
