Deoxidation of Titanium Using Mg as Deoxidant in MgCl2-YCl3 Flux
| العنوان: | Deoxidation of Titanium Using Mg as Deoxidant in MgCl2-YCl3 Flux |
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| المؤلفون: | Akihiro Iizuka, Toru H. Okabe, Yu ki Taninouchi, Chenyi Zheng, Takanari Ouchi |
| المصدر: | Metallurgical and Materials Transactions B. 50:622-631 |
| بيانات النشر: | Springer Science and Business Media LLC, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010302 applied physics, Materials science, Magnesium, 0211 other engineering and technologies, Metals and Alloys, Oxide, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, Yttrium, Condensed Matter Physics, Electrochemistry, 01 natural sciences, Cathode, law.invention, Ion, Anode, chemistry.chemical_compound, chemistry, Mechanics of Materials, law, 0103 physical sciences, Materials Chemistry, 021102 mining & metallurgy, Titanium |
| الوصف: | To reduce the oxygen level in titanium (Ti) to less than 1000 mass ppm O, using magnesium as the deoxidant at 1300 K (1027 °C), the activity of the deoxidation product (MgO), i.e., aMgO, in the system must be reduced to less than 0.04, from a thermodynamic viewpoint. In this study, we developed a new deoxidation technique for Ti, by adding yttrium chloride (YCl3) to magnesium chloride (MgCl2) flux, which effectively decreases and maintains the aMgO in the system at a low level, via the formation of yttrium oxychloride (YOCl). Through thermodynamic assessment using a $$ p_{{{\text{O}}_{ 2} }} {\text{-}}p_{{{\text{Cl}}_{ 2} }} $$ diagram, as well as experiments, the deoxidation of Ti to an oxygen level below 1000 mass ppm O, via the reaction O (in Ti) + Mg + YCl3 → MgCl2 + YOCl, was confirmed. Furthermore, using the E-pO2− diagram of the M-O-Cl system (M = Y, Mg), the possibility of electrochemical deoxidation is discussed. In the MgCl2-YCl3 flux, Mg deposits on the Ti cathode and simultaneously deoxidizes it. The activity of the deoxidation product, MgO, decreases due to the formation of YOCl and/or the electrochemical oxidation of oxide ions on the carbon anode; thus, the deoxidation of Ti becomes feasible. This new deoxidation technique using rare-earth-containing MgCl2 flux can be applied to the recycling of Ti scraps, in the future. |
| تدمد: | 1543-1916 1073-5615 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::9f10506349c5c151f69292c8c948d859Test https://doi.org/10.1007/s11663-018-1494-2Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........9f10506349c5c151f69292c8c948d859 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15431916 10735615 |
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