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May 7, 2026Metallurgical and Materials Transactions B0 citationsOpen Access

Desiliconization of a Molten Ni-Base Superalloy Using Refining Agents

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MDMasaki DobashiCTChihiro TabataSUSatoshi Utada

Key Points

  • This research aims to analyze the effects of different oxide agents on the desiliconization of a Ni-base superalloy.
  • Comparative analysis of CoO, Cr2O3, and CaO as desiliconization agents
  • Elemental analyses to determine Si concentration changes
  • Element mapping to investigate underlying mechanisms
  • All agents successfully reduced Si concentration in the alloy
  • CoO showed the greatest desiliconization efficiency
  • Desiliconization mechanisms involve redox reactions for CoO and Cr2O3, and calcium aluminates for CaO.

Abstract

Abstract Effects of oxide agents, CoO, Cr 2 O 3 , and CaO on desiliconization during vacuum induction melting of Ni-base superalloys were compared. Elemental analyses revealed that all desiliconization agents decreased the Si concentration in the alloy, with CoO exhibiting the highest desiliconization efficiency. Meanwhile, element mapping results suggest that, desiliconization is attributed to redox reactions for CoO and Cr 2 O 3 , whereas the formation of calcium aluminates likely contributed to the desiliconization of the alloy for CaO.

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Cite This Study

Dobashi et al. (2026) studied this question.

synapsesocial.com/papers/69fbefef164b5133a91a40b3https://doi.org/10.1007/s11663-026-04067-3
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Impurities and trace elements in nickel-base superalloys1976 · 140 citations
  2. 2Development of Si-Bearing 4th Generation Ni-Base Single Crystal Superalloys2008 · 28 citations
  3. 3The Control of Sulfur Content in Nickel-Base, Single Crystal Superalloys and Its Effects on Cyclic Oxidation Resistance1996 · 26 citations
  4. 4Effect of Uncombined Calcium and Magnesium on the Malleability of Nickel Alloys1976 · 10 citations
  5. 5The detrimental effect of elemental contaminants when using B additions to improve the creep properties of a Ni-based superalloy2021 · 17 citations