Interaction mechanism between BaZrO_(3)/Y_(2)O_(3) refractory and Ti_(2)Ni alloy melts  

作　　者：Xiao Hou Guang-yao Chen Jian Liu Ming-rui Lv Fei-hai Yu Qi-sheng Feng Rong-bin Li Xiong-gang Lu Chong-he Li 

机构地区：[1]State Key Laboratory of Advanced Special Steel and Shanghai Key Laboratory of Advanced Ferromeallurgy and School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China [2]Shanghai Special Casting Engineering Technology Research Center,Shanghai 201605,China [3]Zhejiang Institute of Advanced Materials,Shanghai University,Jiashan 314100,Zhejiang,China [4]School of Materials Science and Engineering,Shanghai DianJi University,Shanghai 201306,China

出　　处：《Journal of Iron and Steel Research International》2024年第6期1376-1388,共13页

基　　金：supported by National Natural Science Foundation of China(No.52104305);the Science and Technology Innovation Project of Shanghai Lingang New Area(No.SH-LG-GK-2020).

摘　　要：The titanium alloys with highly chemical activity require stable crucible refractories that can withstand the erosion of alloy melts.The phase composition and microstructure are crucial factors that affect the stability of the refractory crucible.The effect of Y_(2)O_(3) on the composition and microstructure of BaZrO_(3) crucible was systematically investigated,and the improved mechanism of the stability of BaZrO_(3)/Y_(2)O_(3) crucible was clarified in comparison with the BaZrO_(3) crucible.The results showed that the erosion layer thickness of the BaZrO_(3)/Y_(2)O_(3) crucible was only 63μm,which was far less than that in the BaZrO_(3) crucible(485μm),and the erosion layer in the BaZrO_(3)/Y_(2)O_(3) crucible also exhibited a higher density than that in the BaZrO_(3) crucible.During the sintering,Y_(2)O_(3) could improve the densification of the BaZrO_(3) crucible due to the solid solution effect between Y_(2)O_(3) and ZrO_(2),which also caused the evaporation of BaO,resulting in the generation of a Y_(2)O_(3)(ZrO_(2))film on the surface of the crucible.Furthermore,the Y_(2)O_(3)(ZrO_(2))had higher thermodynamic stability than Y_(2)O_(3),confirming that the BaZrO_(3)/Y_(2)O_(3) crucible with high density exhibited a superior erosion resistance to titanium alloys.This dual-phase structure provides a strategy to design a long-life and stable refractory for melting titanium alloys.

关 键 词：Barium zirconate Yttrium oxide Dual-phase refractory Titanium alloy INTERACTION 

分 类 号：TG1[金属学及工艺—金属学]