Corrosion resistance of calcium zirconate crucible to titanium-copper melts

Role of Ca additive on the effect of phase composition and microstructure of BaZrO3 refractory and its interaction with titanium alloys

“…Thirdly, when the doping content of the Ca additive was 7.7 wt.%, the crucibles only consisted of Ba 1‐x Ca x ZrO 3 and CaZrO 3 phases. According to previous studies, 29–32 the dissolution of CaZrO 3 and Ba 1‐x Ca x ZrO 3 in the titanium alloy melt should be the main form of interaction between the crucibles and the alloys. $$$$\begin{eqnarray} && B{a_{1 - x}}C{a_x}Zr{O_3}\left( s \right) \to \left( {1 - x} \right)BaO\left( l \right) + \left[ {Zr} \right]\left( l \right)\nonumber\\ &&\quad +\, x\left[ {Ca} \right]\left( l \right) + \left( {2 + x} \right)\left[ O \right]\left( l \right) \end{eqnarray}$$$$…”

“…The dissolution products of CaZrO 3 contained Ca, Zr and O, and entered the alloy melt. 31 Further analysis of the values in Table 4 by combined with the equation mentioned above, it can be seen that the content of the crucible constitution elements in the alloy melted by the C series crucibles was smaller than those of the alloys melted by the B series crucibles. It showed that the C series crucibles exhibited less dissolution content in the alloy melts.…”

“…Thirdly, when the doping content of the Ca additive was 7.7 wt.%, the crucibles only consisted of Ba 1-x Ca x ZrO 3 and CaZrO 3 phases. According to previous studies, [29][30][31][32] the dissolution of CaZrO 3 and Ba 1-x Ca x ZrO 3 in the titanium alloy melt should be the main form of interaction between the crucibles and the alloys.…”

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

“…Alkaline earth zirconates with high chemical stability belong to the perovskite structure. Song and Ti-Cu alloy was about 740 µm [14]. Meng et al investigated the corrosion resistance of the Y 2 O 3 -doped SrZrO 3 crucible for melting NiTi alloy.…”