Particle Segregation Regulation in Slipping Casting of Al 2O3 Crucible
The research on high-performance crucibles is crucial for the development of superalloy.Due to issues such as particle segregation during crucible preparation,resulting in uneven microstructure and poor overall performance.The Al2O3 crucible for superalloy melting was prepared by the slipping casting method in this study.The effects of the dispersant and solid content on particle segregation during slip casting of Al2O3 crucibles were studied,and theoretical analysis of particle segregation was conducted to mitigate the adverse effects during the forming process.By adding 0.3 wt％ammonium citrate and 0.3 wt％gum arabic as dispersants and with a solid content of 66 vol％,the particle segregation regulation in the slip cast Al2O3 crucible was realized.The prepared Al2O3 crucible with a uniform structure was suitable for superalloy melting.
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