Effect of Na2SiO3 concentration on the properties of AZ31 magnesium alloy prepared by electrolytic plasma processing

Ahn, Byung-Hyun; Lee, Dong Gun; Cho, Hoje; Lee, Seung-Rok; Anwar, M. S.; Koo, Bon‐Heun

doi:10.1007/s13391-013-6018-2

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…This was because, at a high temperature, Mg in the substrate underwent arc breakdown and combined with O to form MgO, after which it flowed to the substrate surface and was rapidly condensed by the electrolyte, resulting in stress in the crystalline MgO phase and related XRD peak offsets. In addition, Mg2SiO4 phase was found in each coating, which was consistent with the literature [25]. In addition, at high temperatures, MgO will further form Mg2SiO4 and MgAl2O4 phases with SiO3 2− and Al2O3.…”

Section: Xrd Analysissupporting

confidence: 90%

“…This was because, at a high temperature, Mg in the substrate underwent arc breakdown and combined with O to form MgO, after which it flowed to the substrate surface and was rapidly condensed by the electrolyte, resulting in stress in the crystalline MgO phase and related XRD peak offsets. In addition, Mg 2 SiO 4 phase was found in each coating, which was consistent with the literature [25] study, the test depths were small, such that MgF2 was detected. Although the coating contained magnesium phosphate, in accordance with the literature [26], P in the membrane layer mainly existed in an amorphous form, without a diffraction peak.…”

Section: Xrd Analysissupporting

confidence: 90%

“…In this study, a black PEO coating was prepared on an AZ31B Mg alloy surface by adding NH 4 VO 3 into (NaPO 3 ) 6 -Na 2 SiO 3 electrolyte at different temperatures (5,15,25, and 35 • C). The structure, composition, morphology, roughness, and color value of each of the PEO coatings were then characterized.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Electrolyte Temperature on the Color Values of Black Plasma Electrolytic Oxidation Coatings on AZ31B Mg Alloy

Liao

Zhu

et al. 2020

Coatings

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A coating was prepared on an AZ31B Mg alloy substrate via black plasma electrolytic oxidation (PEO). The colorant NH4VO3 was added to Na2SiO3–(NaPO3)6 electrolyte at different temperatures (5, 15, 25, and 35 °C). The influences of electrolyte temperature on the structures, compositions, and color values of black PEO coatings were studied by UV–Visible, XRD, XPS, Raman, and SEM techniques. The results showed that the relative content of V2O3 and V2O5 was the key factor affecting the coating color value. At higher temperatures, more NH3 escaped from the electrolyte and the NH3 quantity participating in the reaction decreased, resulting in a decrease of V2O3 content, an increase in color value, and a darker coating. In the PEO process, VO3− mainly reacted to form V2O5, and then, the generated V2O5 reacted with NH3 to form V2O3.

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Section: Xrd Analysissupporting

confidence: 90%

“…This was because, at a high temperature, Mg in the substrate underwent arc breakdown and combined with O to form MgO, after which it flowed to the substrate surface and was rapidly condensed by the electrolyte, resulting in stress in the crystalline MgO phase and related XRD peak offsets. In addition, Mg 2 SiO 4 phase was found in each coating, which was consistent with the literature [25] study, the test depths were small, such that MgF2 was detected. Although the coating contained magnesium phosphate, in accordance with the literature [26], P in the membrane layer mainly existed in an amorphous form, without a diffraction peak.…”

Section: Xrd Analysissupporting

confidence: 90%