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HomeKey Engineering MaterialsKey Engineering Materials Vol. 768Preparation of High Density BaZr0.97Y0.03O3-δ...

Preparation of High Density BaZr_0.97Y_0.03O_3-δ Ceramic and its Interaction with Titanium Melt

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Abstract:

In this paper, the BaZrO₃(BZ) and BaZr_0.97Y_0.03O_3-δ (BZY3) powders were prepared by using the industrial grade BaCO₃, ZrO₂ and Y₂O₃ powders combining the conventional solid state reaction. The BaZrO₃(BZ) and BaZr_0.97Y_0.03O_3-δ(BZY3) ceramics were fabricated at 1750°C. The effect of ball milling time and sintering aid (TiO₂) on the sinterability of BaZr_0.97Y_0.03O_3-δ(BZY3) ceramics were investigated, and the improved stability of BaZrO₃ refractory with Y₂O₃additive were studied according to the refractory-metal interaction. The results revealed that the particle size of BZY3 powders decreased first and then increased with the increasing of ball milling time from 6h to 12h, and the minimum particle size was only 2.252μm at 8h. When 2wt.%TiO₂ was added, the sintered pellet of BZY3 was the most densest and the relative density was above 95%. After melting the Ti₂Ni alloy on the BZY and BZ ceramics, the thickness erosion layer of BaZrO₃ and BZY₃ refractories and Ti₂Ni alloy is approximately 50μm and 20μm respectively, showing that BZY3 was more stable than BaZrO₃ refractory.

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Periodical:

Key Engineering Materials (Volume 768)

Pages:

261-266

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.768.261

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Online since:

April 2018

Authors:

Ju Yun Kang, Guang Yao Chen, Bao Tong Li, Zi Wei Qin, Xiong Gang Lu, Chong He Li*

Keywords:

Ball Milling, Interfacial Reaction, Sintering Aid, Stability, Titanium Alloy

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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