Microstructure of Bi-containing zirconium alloys  

作　　者：Han-Pei Zhao Mei-Yi Yao Jiao Huang Jin-Long Zhang Jian-Chao Peng Bang-Xin Zhou 

机构地区：[1]Laboratory for Microstructure,Shanghai University,Shanghai,200444,China [2]Institute of Materials,Shanghai University,Shanghai,200072,China

出　　处：《Rare Metals》2022年第10期3566-3573,共8页稀有金属（英文版）

基　　金：financially supported by tne National Natural Science Foundation of China (Nos.51171102 and 50971084)。

摘　　要：The effect of Bi addition(0.05 wt%-0.50 wt%)on the microstructure of zirconium alloys,including T5(Zr-0.7 S n-1.0 Nb-0.3 Fe-0.1 Cr),S5(Zr-0.8 Sn-0.35 Nb-0.4 Fe-0.1 Cr),Zr-4(Zr-1.5 Sn-0.2 Fe-0.1 Cr) and Zr-1 Nb,was investigated by transmission electron microscopy(TEM),energy-dispersive spectroscopy(EDS) and selected area electron diffraction(SAED).Results show that with the increase in Bi content,h-Zr(Fe,Cr,Nb)2,o-Zr(Fe,Sn,Bi)_(2) and Zr-Fe-Cr-Nb-Sn-Bi second-phase particles(SPPs) precipitate successively in the T5+xBi and S5+xBi alloys;in the Zr-4+xBi alloys,h-Zr(Fe,Cr)2,o-Zr(Fe,Sn,Bi)2,Zr-Fe-Cr-Sn-Bi and Zr-Fe-Cr-Bi SPPs are detected successively.While as for Zr-1 Nb+xBi alloys,Bi-free SPPs appear.The addition of Bi promotes the precipitation of SPPs with Sn in the alloys.The concentration of Bi dissolved in α-Zr matrix increases with the decrease in Sn content in the alloys.Adding reasonable Bi has little influence on the solid solution content of Nb in α-Zr matrix.

关 键 词：Zirconium alloy BISMUTH Second-phase particles MICROSTRUCTURE 

分 类 号：TG146.414[一般工业技术—材料科学与工程] TL352[金属学及工艺—金属材料]