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Metallurgical and Materials Transactions B
Erschienen in: Metallurgical and Materials Transactions B 3/2013

01.06.2013

Crystallization Kinetics and Structure of Mold Fluxes with SiO2 Being Substituted by TiO2 for Casting of Titanium-Stabilized Stainless Steel

verfasst von: Zhen Wang, Qifeng Shu, Kuochih Chou

Erschienen in: Metallurgical and Materials Transactions B | Ausgabe 3/2013

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Abstract

Crystallization kinetics and the structure of mold fluxes with SiO2 being substituted by 0, 5, and 10 pct TiO2 were studied by differential thermal analysis technique and Raman spectroscopy, respectively, to explore the effect of TiO2 on the crystallization behavior of the slag. Crystallization kinetics analysis shows that the activation energy for crystal growth increases with the increase of TiO2 substitution, implying that TiO2 substitution for SiO2 in mold fluxes produces negative effects on crystal growth and retards the crystallization process. Raman spectral study indicates that TiO2 enters the system mainly in the form of [TiO4] in monomer structure unit, and simultaneously, there appear relatively small amounts of [TiO6] structure unit. The introduction of TiO2 leads to a decrease of the dimer and chain Si-O-Si structure unit (Q1 and Q2).
Vorheriger Artikel Numerical Modeling of Free Surface Dynamics of Melt in an Alternate Electromagnetic Field: Part I. Implementation and Verification of Model
Nächster Artikel Role of Grain Refinement in the Hot Tearing of Cast Al-Cu Alloy

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Metadaten
Titel
Crystallization Kinetics and Structure of Mold Fluxes with SiO2 Being Substituted by TiO2 for Casting of Titanium-Stabilized Stainless Steel
verfasst von
Zhen Wang
Qifeng Shu
Kuochih Chou
Publikationsdatum
01.06.2013
Verlag
Springer US
Erschienen in
Metallurgical and Materials Transactions B / Ausgabe 3/2013
Print ISSN: 1073-5615
Elektronische ISSN: 1543-1916
DOI
https://doi.org/10.1007/s11663-013-9803-2

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