Synthesis of As-Cast Ti-Al-V Alloy from Titanium-Rich Material by Thermite Reduction

Cheng, Chu; Dou, Zhi He; Zhang, Ting An; Zhang, Hui Jie; Yi, Xiaosu; Su, Jian

doi:10.1007/s11837-017-2467-7

Cited by 18 publications

(4 citation statements)

References 9 publications

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“…31,32) The main mechanism of exothermic reaction in Ti/SiO 2 nanoparticles can be considered to be the thermite reaction caused by Ti absorbing oxygen atoms from SiO 2 and air. [33][34][35] Furthermore, it is highly possible that the exothermic reaction occurred with the formation of the alloy of Ti and Si because the repeating structure of Ti and Si was realized in each porous nanoparticle. Then, the increase of calorific value due to the alloy formation of Ti and Si resulted from that the ratio of Si increased by increasing the reduction amount.…”

Section: Mechanism Of Changing Exothermic Characteristics By Sio 2 Re...mentioning

confidence: 99%

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Shindo¹,

Kumakiri²,

Terasawa³

et al. 2021

Jpn. J. Appl. Phys.

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This paper describes the effect of molten salt reduction on exothermic characteristics of Ti/reduced-SiO2 nanoparticles. Sputtered Ti/Si multilayer film is known to show exothermic reaction by electrical shock or mechanical impact during intermetallic compound formation. So far, we demonstrated that SiO2/Ti nanoparticles, which are produced by combining atomized heating for porous SiO2 nanoparticle and sputtering for Ti deposition, show exothermic reaction. if an amount of oxygen in SiO2 nanoparticles can be changed, it is expected that exothermic characteristics can be controlled more accurately. In this paper, the effect of reduction on exothermic reaction is investigated, and the mechanism of the reduced effect is discussed based on the result of differential scanning calorimetry analysis.

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Section: Mechanism Of Changing Exothermic Characteristics By Sio 2 Re...mentioning

confidence: 99%

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Shindo¹,

Kumakiri²,

Terasawa³

et al. 2021

Jpn. J. Appl. Phys.

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“…Vanadium is an important strategic metal widely used in various fields of industry. In ferrous metallurgy, V in the form of ferrovanadium is used for steel alloying [ 1 , 2 , 3 ] and in non-ferrous metallurgy in aluminum-vanadium alloys for alloying titanium-based structural materials used in aerospace engineering (engines, fuselages of high-speed aircraft) [ 4 , 5 , 6 , 7 ]. In the chemical industry, vanadium compounds are used as catalysts [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Hydrometallurgical Methods for Obtaining Vanadium Concentrates from the Waste by Chemical Production of Vanadium Pentoxide

et al. 2022

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The paper describes hydrometallurgical methods to recycle wastes of vanadium pentoxide chemical fabrication. Sludges containing a significant amount of V2O5 can be considered as an additional source of raw materials for vanadium production. We studied the one-stage leaching method using various iron-based reductants for converting V5+ to V4+ in a solution allowing to precipitate V when its concentration in the solution is low. As a result of the reduction leaching with further precipitation, we obtained concentrates with V2O5 content of 22–26% and a high amount of harmful impurities. Multistage counterflow leaching can be used to fabricate solutions with vanadium pentoxide concentration suitable for vanadium precipitation by hydrolysis and adding ammonium salts. The solutions with V2O5 content of ≈15 g/L can be obtained from the initial sludge by three-stage counterflow vanadium leaching. A concentrate with a content of 78 wt% V2O5 can be precipitated from these solutions at pH = 2.4 by adding ammonium chloride. Additionally, concentrate with V2O5 content of ≈94 wt% was precipitated from the solution with a concentration of >20 g/L V2O5 obtained from the roasted sludge. The concentrates were purified for increasing the vanadium content to 5–7%. The consumption and technological parameters of the considered processes are presented in the paper.

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“…The properties of titanium alloys can be effectively optimized when a certain proportion of vanadium is added to the titanium alloys, especially the ductility, corrosion resistance, and high temperature resistance of the alloy that are significantly improved [1][2][3]. Titanium alloys with metallic vanadium are widely used in major areas such as aerospace, nuclear energy materials, and weaponry [4][5][6][7][8]. Generally, vanadium is added to the titanium alloy in the form of aluminum-vanadium (Al-V) alloy.…”

Section: Introductionmentioning

confidence: 99%

Study of Controlled Aluminum-Vanadium Alloy Prepared by Vacuum Resistance Furnace

Wan

et al. 2021

International Journal of Photoenergy

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In this paper, V2O3 is used as the raw material, and an Al-V alloy is synthesized by vacuum resistance furnace heating. The results show that with the extension of the heating time, the separation effect of the alloy and the slag and the uniformity of the alloy are significantly improved. The slag is fully separated from the alloy, and the composition of the alloy is more uniformly distributed when the heating time is controlled at 1 hour. In addition, the composition of the alloy is affected by increasing content of Al. In particular, the obtained alloy composition meets commercial standards when the mass ratio of Al is 31-36 wt%. The effect of different mass ratios of CaO on the quality of slag series and alloys was also investigated. The results show that the composition distribution of the slag system can be effectively changed with increasing the mass ratio of CaO, and the uniformity of the alloy composition is also optimized. When the mass ratio of CaO is 27 wt%, the alloy and slag are well separated, and the composition distribution in the obtained alloy is more uniform. In addition, the content of impurities in the alloy can be effectively improved under vacuum. Therefore, it is suggested that a vacuum resistance furnace should be applied in the industrial production of high-quality Al-V alloy.

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Synthesis of As-Cast Ti-Al-V Alloy from Titanium-Rich Material by Thermite Reduction

Cited by 18 publications

References 9 publications

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Effect of molten salt reduction on exothermic characteristics of titanium/reduced-silica nanoparticles

Analysis of Hydrometallurgical Methods for Obtaining Vanadium Concentrates from the Waste by Chemical Production of Vanadium Pentoxide

Study of Controlled Aluminum-Vanadium Alloy Prepared by Vacuum Resistance Furnace

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