2021
DOI: 10.1007/s11663-021-02354-9
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Identification of MgO·Al2O3 Spinel on MgO Refractory for Aluminum Deoxidation Process of Stainless Steel Using Cathodoluminescence and X-ray Excited Optical Luminescence Imaging

Abstract: MgOAEAl 2 O 3 spinel particles adhered to MgO refractory become a source of inclusions in stainless steel during the aluminum deoxidation process. In contrast, the MgOAEAl 2 O 3 spinel layer formed on MgO refractory can protect it from further dissolution and spalling. Thus, identifying the MgOAEAl 2 O 3 spinel particles and layer is critical for locating areas on the refractory that require repair and replacement. In this study, the author demonstrates that the MgOAEAl 2 O 3 spinel particles and layer on MgO … Show more

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Cited by 10 publications
(2 citation statements)
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“…The model sample was prepared by melting metal powders consisting of stainless-steel (Fe, Cr, Ni, and Mn) and a metal deoxidizer (Al) under inert gas atmosphere. [21,24,25,36] Half of a mixture of 68 mass pct electrolytic Fe powder (purity: 95 pct, Wako Pure Chemical Industries, Ltd., Osaka, Japan), 20 mass pct Cr powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan), 10 mass pct Ni powder (purity: 99 pct, Wako Pure Chemical Industries, Ltd., Osaka, Japan), 1 mass pct Mn powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan) were first placed in a MgO crucible, and 1 mass pct Al powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan) was placed on the mixture. Next, the remaining half of the mixture was placed on the Al powder.…”
Section: Methodsmentioning
confidence: 99%
“…The model sample was prepared by melting metal powders consisting of stainless-steel (Fe, Cr, Ni, and Mn) and a metal deoxidizer (Al) under inert gas atmosphere. [21,24,25,36] Half of a mixture of 68 mass pct electrolytic Fe powder (purity: 95 pct, Wako Pure Chemical Industries, Ltd., Osaka, Japan), 20 mass pct Cr powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan), 10 mass pct Ni powder (purity: 99 pct, Wako Pure Chemical Industries, Ltd., Osaka, Japan), 1 mass pct Mn powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan) were first placed in a MgO crucible, and 1 mass pct Al powder (purity: 99.9 pct, Kojundo Chemical Laboratory Co., Ltd., Saitama, Japan) was placed on the mixture. Next, the remaining half of the mixture was placed on the Al powder.…”
Section: Methodsmentioning
confidence: 99%
“…The CL spectra of the surfaces of the Cr 2 O 3 lm-deposited sapphires and the heat-treated Ni-25Cr-5Al alloys were acquired using the custom SEM-CL system previously described by the author [15,16,18,21,[26][27][28][29][30][31]. In brief, the CL spectra were acquired using an optical spectrometer (QE65Pro, Ocean Optics Inc., Largo, Florida, USA) by connecting an optical ber with a plano-convex lens at its tip opposite to that connected to the optical spectrometer.…”
Section: Methodsmentioning
confidence: 99%