Magnesiothermic reduction for direct synthesis of Ti-Nb alloy at 1073 K (800 °C)

Kyunsuk Choi, Kwang Hee Lee, Basit Ali, Sang Hoon Choi, Kyoung Tae Park, Il Sohn

Research output: Contribution to journalArticle

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. TiO 2 , Nb 2 O 5 , and complex TiNb 2 O 7 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 TiO 2 , intermediate oxide phases of Ti 6 O could still be observed, but reduction of Nb 2 O 5 and TiNb 2 O 7 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 TiNb 2 O 7 oxide is possible and can be more efficient than alloying pure metallic elements of Ti and Nb.

Original languageEnglish
Pages (from-to)1037-1044
Number of pages8
JournalMetals and Materials International
Volume23
Issue number5
DOIs
Publication statusPublished - 2017 Sep 1

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niobium alloys
Niobium alloys
titanium alloys
Niobium
Titanium alloys
Oxides
niobium
oxides
synthesis
Titanium
titanium
gloves
fabrication
Fabrication
Chemical potential
Reducing Agents
alloying
metal oxides
Metal complexes
boxes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Choi, Kyunsuk ; Lee, Kwang Hee ; Ali, Basit ; Choi, Sang Hoon ; Park, Kyoung Tae ; Sohn, Il. / Magnesiothermic reduction for direct synthesis of Ti-Nb alloy at 1073 K (800 °C). In: Metals and Materials International. 2017 ; Vol. 23, No. 5. pp. 1037-1044.
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Magnesiothermic reduction for direct synthesis of Ti-Nb alloy at 1073 K (800 °C). / Choi, Kyunsuk; Lee, Kwang Hee; Ali, Basit; Choi, Sang Hoon; Park, Kyoung Tae; Sohn, Il.

In: Metals and Materials International, Vol. 23, No. 5, 01.09.2017, p. 1037-1044.

Research output: Contribution to journalArticle

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