Deoxidation of Titanium alloy using hydrogen

Su, Yanqing; Luo, Liangshun; Jiang, Xiaohong; Guo, Jingjie; Fu, Hengzhi

doi:10.1016/j.ijhydene.2009.08.053

Cited by 58 publications

(21 citation statements)

References 17 publications

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“…For example, there are many reports on the deoxidation of solid Ti using Ca as a deoxidant. [7][8][9][10][11][12][13][14][15]20,[24][25][26][27]29,[33][34][35]37] Oxygen removal during melting process using Ca, [31,32] Al, [28] and H 2 [30,36] as deoxidants was also studied. More recently, deoxidation with Mg under a H 2 atmosphere was reported and gained a significant amount of attention in the field.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Considerations of Direct Oxygen Removal from Titanium by Utilizing the Deoxidation Capability of Rare Earth Metals

Okabe

Zheng

Taninouchi

2018

Metall Mater Trans B

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Oxygen removal from metallic Ti is extremely difficult and, currently, there is no commercial process for effectively deoxidizing Ti or its alloys. The oxygen concentration in Ti scraps is normally higher than that in virgin metals such as in Ti sponges produced by the Kroll process. When scraps are remelted with virgin metals for producing primary ingots of Ti or its alloys, the amount of scrap that can be used is limited owing to the accumulation of oxygen impurities. Future demands of an increase in Ti production and of mitigating environmental impacts require that the amount of scrap recycled as a feed material of Ti ingots should also increase. Therefore, it is important to develop methods for removing oxygen directly from Ti scraps. In this study, we evaluated the deoxidation limit for b-Ti using Y or light rare earth metals (La, Ce, Pr, or Nd) as a deoxidant. Thermodynamic considerations suggest that extra-low-oxygen Ti, with an oxygen concentration of 100 mass ppm or less can be obtained using a molten salt equilibrating with rare earth metals. The results presented herein also indicate that methods based on molten salt electrolysis for producing rare earth metals can be utilized for effectively and directly deoxidizing Ti scraps.

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Section: Introductionmentioning

confidence: 99%

Thermodynamic Considerations of Direct Oxygen Removal from Titanium by Utilizing the Deoxidation Capability of Rare Earth Metals

Okabe

Zheng

Taninouchi

2018

Metall Mater Trans B

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“…In our recent work, it was found that hydrogen can be absorbed by Ti-based or TieAl based alloys when melting under the gaseous mixture hydrogen and argon. This method can be called as melt hydrogenation, which can lead to the microstructure refinement and purification in the alloys [22].…”

Section: Introductionmentioning

confidence: 99%

Enhanced plasticity in Zr-based bulk metallic glasses by hydrogen

Dong

Luo

et al. 2012

International Journal of Hydrogen Energy

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“…In our recent work, hydrogen was absorbed by Ti-based and Ti-Al based alloys when the alloys was melted under the gaseous mixture hydrogen and argon, called as melt hydrogenation, leading to the microstructure refinement and decrease of oxygen contents in the alloys [15][16][17][18]. Most glassy alloys contain some alloying elements that have a high affinity for hydrogen such as Zr, Ti, Hf, Mg and rare earth elements.…”

Section: Introductionmentioning

confidence: 99%