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Dissolution of BaZrO 3 refractory in titanium melt
Author(s) -
Chen Guangyao,
Kang Juyun,
Gao Pengyue,
Qin Ziwei,
Lu Xionggang,
Li Chonghe
Publication year - 2018
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13009
Subject(s) - dissolution , materials science , titanium , crucible (geodemography) , metallurgy , scanning electron microscope , refractory metals , refractory (planetary science) , chemical engineering , composite material , chemistry , computational chemistry , engineering
Although numerous investigations have studied BaZrO 3 as a crucible refractory for melting titanium alloys, the interaction mechanism between them has not been clarified. In this study, a set of three designed alloys with different Ti composition (TiNi, Ti 1.5 Ni, and Ti 2 Ni) were melted in the BaZrO 3 crucibles. By using the X‐ray diffraction, optical, and scanning electron microscopy analysis, the interactions between the BaZrO 3 crucibles and the titanium melts were investigated. It was found that dissolution of the BaZrO 3 refractory into the titanium melts resulted in the crucible erosion and the melt contamination, the degree of which were both increased with the increasing of Ti content in the melts. The dissolution reaction could be determined as follows: TixNi ( l ) + x 2 BaZrO 3 ( s ) → TixNi x 2 Zr, xO ( l ) + x 2 BaO ( l ) . The oxygen content dissolved in TiNi, Ti 1.5 Ni, and Ti 2 Ni melts was thermodynamically calculated as 0.0055, 0.1922, and 0.2263 wt%, respectively, which were in agreement with the experimental results.