Corrosion behavior of calcium zirconate refractories in contact with titanium aluminide melts
Corrosion behavior of calcium zirconate refractories in contact with titanium aluminide melts
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DOI：
10.1016/j.jeurceramsoc.2014.09.032
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发表时间：
2015-03-01
影响因子：
5.7
通讯作者：
Friedrich, Bernd
中科院分区：
文献类型：
--
作者：
Schaffoener, Stefan;Aneziris, Christos G.;Friedrich, Bernd
本文研究了真空感应熔炼钛铝合金过程中锆酸钙坩埚的腐蚀机理。坩埚经受住了几次熔化，并且没有表现出由于热冲击而导致的破裂。然而，大量的锆溶解在熔体中，而熔体的氧含量在低得多的水平上增加。与在相同坩埚中熔化Ti6A14V相反，坩埚中增加的锆酸钙含量没有减少铝化钛熔体的熔体污染。坩埚腐蚀前沿的研究表明形成了铝酸钙，而钛几乎不存在。钛铝合金的熔炼和随后的电渣重熔精炼可能是生产钛锆铝合金的可行的生产路线。此外，锆酸钙耐火材料与钛基合金接触时的腐蚀与其成分的关系还有待进一步研究。(C)2014爱思唯尔有限公司版权所有。
This contribution investigated the corrosion mechanisms of calcium zirconate crucibles during vacuum induction melting of titanium aluminides. The crucibles withstood several melts and exhibited no cracking due to thermal shock. However, a significant amount of zirconium dissolved in the melt, whereas the oxygen content of the melt increased on a much lower level. In contrast to melting Ti6A14V in the same crucibles an increased calcium zirconate content of the crucibles did not reduce the melt contamination of the titanium aluminide melts. The investigation of the corrosion front of the crucibles revealed the formation of calcium aluminates, whereas titanium was almost absent. The melting of titanium aluminides with subsequent refining by electro slag remelting could be a viable production route to produce titanium zirconium aluminum alloys. Furthermore, the relation between the corrosion of calcium zirconate refractories in contact with titanium based alloys depending on their composition should be further evaluated. (C) 2014 Elsevier Ltd. All rights reserved.