Microstructure evolution of Y2O3 doped BaZrO3 and its interface reaction with titanium melt

被引：0

作者：

Zhou L.-H. ^{[1
]}

Chen G.-Y. ^{[1
]}

Li B.-T. ^{[1
]}

Cheng Z.-W. ^{[3
]}

Ali W. ^{[1
]}

Lu X.-G. ^{[1
,2
]}

Li C.-H. ^{[1
,2
]}

机构：

[1] Shanghai Key Laboratory of Advanced Ferrometallurgy, School of Materials Science and Engineering, Shanghai University, Shanghai

[2] Shanghai Special Casting Engineering Technology Research Center, Shanghai

[3] Sflyxgs. Chinaepu. Co., Ltd., Taicang

来源：

Li, Chong-He (chli@staff.shu.edu.cn) | 1600年 / Central South University of Technology卷 / 27期

基金：

中国国家自然科学基金;

关键词：

Barium zirconate; Doping; Microstructure: interfacial reaction; Yttria;

D O I：

10.19476/j.ysxb.1004.0609.2017.11.12

中图分类号：

学科分类号：

摘要：

Six ratios of Y2O3 doped BaZrO3 powder were prepared from BaCO3, ZrO2 and Y2O3 as raw materials by solid reaction method at 1200℃. Then, the pellets were fabricated by cold isostatic pressing and sintered at 1750℃. The effect Y2O3 on the constituents of BaZrO3 powder and microstructure evolution of BaZrO3 pellets was studied by using the X-ray diffraction (XRD) and scanning electron microscopy (SEM) combined with EDS. The results show that the Y2O3 doped BaZrO3 mainly consists of two phases, i. e., BaZrO3 and Ba2YZrO6. The content of Ba2YZrO6 increases gradually and the phenomenon of aggregation appears as the amount of Y2O3 increasing. At the same time, the growth of BaZrO3 grains are restrained, the grain boundaries of BaZrO3 and Ba2YZrO6 transform from regular polyhedron boundary to irregular amorphous grain boundary, which make the surface of the pellets porous and lower dense. When the mole ratio of BaCO3, ZrO2 and Y2O3 is about 0.48:0.47:0.1, the relative density of pellets reaches to 97.1%. This proportion of powder was prepared into crucible and utilized to melt TiNi alloys using vacuum induction. There is no obvious interaction layer and elements diffusion between the crucible and the melt, which may imply that the Y-doped BaZrO3 refractory is a promising candidate for melting titanium alloys. © 2017, Science Press. All right reserved.

引用

页码：2276 / 2282

页数：6

共 21 条

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