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Effects of the precipitation of stabilizers on the mechanism of grain fracturing in a zirconia metering nozzle

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Abstract

The mechanism of grain fracturing in a zirconia metering nozzle used in the continuous casting process was studied. The phase composition, microstructure, and chemical composition of the residual samples were studied using an X-ray fluorescence analyzer, scanning electron microscope, and electron probe. Results revealed that the composition, structure, and mineral phase of the original layer, transition layer, and affected layer of the metering nozzle differed because of stabilizer precipitation and steel slag permeation. The stabilizer MgO formed low-melting phases with steel slag and impure SiO2 on the boundaries (pores) of zirconia grains; consequently, grain fracturing occurred and accelerated damage to the metering nozzle was observed.

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Authors and Affiliations

  1. College of Materials and Mineral Resources, Xi’an University of Architecture and Technology, Xi’an, 710055, China

    Liang Zhao, Qun-hu Xue & Dong-hai Ding

  2. Shaanxi Techno-institute of Recycling Economy, Xi’an, 710055, China

    Qun-hu Xue

Authors
  1. Liang Zhao
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  2. Qun-hu Xue
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  3. Dong-hai Ding
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Correspondence to Qun-hu Xue.

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Zhao, L., Xue, Qh. & Ding, Dh. Effects of the precipitation of stabilizers on the mechanism of grain fracturing in a zirconia metering nozzle. Int J Miner Metall Mater 23, 1041–1047 (2016). https://doi.org/10.1007/s12613-016-1321-1

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  • DOI: https://doi.org/10.1007/s12613-016-1321-1

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