The effect of mechanical alloying time on the microstructural and mechanical properties of spark plasma sintered Ta–10W

Seyyedin, S.; Zangi, Hadi; Bozorgmehr, Mohsen; Ghasemi, Behzad; Tavallaei, Mohammad Mahdi; Adib, Saeed

doi:10.1016/j.msea.2020.140024

Cited by 13 publications

(4 citation statements)

References 19 publications

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“…During mechanical alloying, under the influence of ball impacts, metal powders are first cold-welded, and then broken and cold-welded again. Moreover, the micro-strain increases in metal powders by severe plastic deformation due to the effect of ball impacts [30]. Micro-strain occurring in metal powders causes the crystal size to decrease and the crystal structure to deteriorate.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Hydrogen Evolution of TiZrNbHfTaOx High-Entropy Oxide Synthesized by Mechano-Thermal Method

Güler,

Boyrazlı,

Albayrak

et al. 2024

Materials

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One of the most promising solutions to slow down CO2 emissions is the use of photocatalysis to produce hydrogen as a clean fuel. However, the efficiency of the photocatalysts is not at the desired level, and they usually need precious metal co-catalysts for reactions. In this study, to achieve efficient photocatalytic hydrogen production, a high-entropy oxide was synthesized by a mechano-thermal method. The synthesized high-entropy oxide had a bandgap of 2.45 eV, which coincided with both UV and visible light regions. The material could successfully produce hydrogen from water under light, but the main difference to conventional photocatalysts was that the photocatalysis proceeded without a co-catalyst addition. Hydrogen production increased with increasing time, and at the end of the 3 h period, 134.76 µmol/m2 h of hydrogen was produced. These findings not only introduce a new method for producing high-entropy photocatalysts but also confirm the high potential of high-entropy photocatalysts for hydrogen production without the need for precious metal co-catalysts.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic Hydrogen Evolution of TiZrNbHfTaOx High-Entropy Oxide Synthesized by Mechano-Thermal Method

Güler,

Boyrazlı,

Albayrak

et al. 2024

Materials

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“…Diffraction peaks of ( 110), ( 200), (211), and (200) crystal planes were observed at the 38.5 °, 55.5 °,69.6 °, and 82.4 °, but no peaks of W appeared. In all curves, the tungsten peak had vanished, suggesting the dissolution of a large amount of available tungsten in the tantalum lattice (taking into account the quantitative comparison of the X-ray analysis and its errors) (Seyyedin et al, 2020), in the shape of the solid solution because of electron-beam smelting.…”

Section: Wear Surface Analysismentioning

confidence: 98%

“…Spark plasma sintering has been used in a few studies to consolidate Ta-W alloys. In a study by Shahram Seyyedin (Seyyedin et al, 2020), the effect of mechanical alloying time on the microstructure, hardness, and tensile properties of Ta-10 (wt%)W alloy sintered at 2000 °C for 5 min using spark plasma sintering was investigated. Furthermore, the corrosion resistance of commercial purity titanium (CP-Ti) and Ti-6Al-4V (TC4) alloys coated with Ta-10W via multi-arc ion plating was investigated by Pei Sun, and electrochemical corrosion testing revealed that the Ta-10W coating improved the substrate's corrosion resistance (Sun et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviors of Ta-10W alloy at elevated temperature

Xia

Duan

et al. 2023

Front. Mater.

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Ta-10W alloy has great potential in the aerospace and nuclear industries due to its good formability, high melting point and excellent high-temperature strength. The purpose of this study was to experimentally research the tribological behaviors of Ta-10W at elevated temperatures and the effects of temperatures on the friction coefficient and the wear rate of Ta-10W in sliding wear. It was found that the main wear mechanism of the material at 100°C was abrasive wear, as well as adhesive wear and slight oxidative wear occurred at 200°C and 300°C. The friction coefficients increased as the temperature rose, which was attributed to the increase in metal viscosity at elevated temperatures. The wear rate gradually decreased with the temperature rising, such that there was a conversion from severe wear to light wear. At 200°C and 300°C, a large amount of stable oxide film covered the scar surface, resulting in decreased wear rate.

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“…The heating is mostly hybrid as the electrical current passes through the powder and the graphite tools depending on the powder conductivity. The high temperatures (>2000 °C) combined with the high pressures (~100 MPa) allow the sintering of materials that are very difficult to process by free-sintering such as Ultra-High-Temperature-Ceramics [1][2][3], Functionally Graded Material [4][5][6], refractory metals [7][8][9] . They also permit to obtain microstructures with interesting properties [10][11][12] in shorter times compared to Hot Pressing or Hot Isostatic Pressing.…”

Section: Introductionmentioning

confidence: 99%

Impact of graphite foil rolling on the thermal field homogeneity of spark plasma sintering

Cloarec

Chevallier

Estournès

et al. 2023

Ceramics International

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The effect of mechanical alloying time on the microstructural and mechanical properties of spark plasma sintered Ta–10W

Cited by 13 publications

References 19 publications

Photocatalytic Hydrogen Evolution of TiZrNbHfTaOx High-Entropy Oxide Synthesized by Mechano-Thermal Method

Photocatalytic Hydrogen Evolution of TiZrNbHfTaOx High-Entropy Oxide Synthesized by Mechano-Thermal Method

Tribological behaviors of Ta-10W alloy at elevated temperature

Impact of graphite foil rolling on the thermal field homogeneity of spark plasma sintering

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