콘텐츠 본문
논문 해외 국제전문학술지(SCI급) Magnesiothermic reduction for direct synthesis of Ti-Nb alloy at 1073 K (800℃)
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2017-09
- 저자명 Kyunsuk Choi, Kwang Hee Lee, Basit Ali, Sang-Hoon Choi, Kyoung-Tae Park & Il Sohn*
- 학술지명 Metals and Materials International
- 발행국가 해외
- 논문언어 외국어
논문 초록 (Abstract)
Direct fabrication of titanium (Ti) and niobium (Nb) alloys by direct magnesiothermic reduction from the respective initial metal oxides and complex oxides has been studied. TiO2, Nb2O5, and complex TiNb2O7 oxides were used as raw materials with Mg used as a reductant. To ensure a high chemical potential of the reactants to drive the spontaneous magnesiothermic reduction of the oxide mixtures, excess Mg five times higher than the required stoichiometric molar ratio was added. Samples were heated in a glove box under recycled and purified Ar atmosphere at 1073 K (800 °C) for 10 h. After the reduction of TiO2, intermediate oxide phases of Ti6O could still be observed, but reduction of Nb2O5 and TiNb2O7 showed metallic Nb and Ti-Nb to be present with negligible oxides according to the scanning electron microscope-energy dispersive spectroscopy and x ray diffraction analysis. This indicated that direct fabrication of Ti-Nb alloys through a complex TiNb2O7 oxide is possible and can be more efficient than alloying pure metallic elements of Ti and Nb.
