Nanostructured α/β-tungsten by reduction of WO3 under microwave plasma

Murugan, K.; Chandrasekhar, S.; Joardar, J.

doi:10.1016/j.ijrmhm.2010.09.005

Cited by 26 publications

(5 citation statements)

References 21 publications

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“…Recently, metallic tungsten was prepared by microwave plasma-induced reduction using coarse grade, crystalline WO 3 as the starting material. 167 The experiment applied a 2·45-GHz, 5-kW microwave source (magnetron) for generating plasma with nitrogen gas. During the preparation process, hydrogen gas, at an optimal flow rate, was used as a carrier gas for the oxide powder feed.…”

Section: Applications Of Microwave Energy To Metallurgymentioning

confidence: 99%

Microwave-assisted metallurgy

Peng

Hwang

2014

International Materials Reviews

183

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Microwave heating has been extensively explored in various fields of materials processing. This technology exhibits unique characteristics including volumetric and selective heating, which eventually lead to many exceptional advantages over conventional processing methods including both energy and cost savings, improved product quality, faster processing and greater ecofriendliness, making microwave heating appropriate for applications in metallurgy. This paper presents a critical review on the use of microwave energy in metallurgy, with emphasis on both fundamentals of microwave heating and recent experimental efforts on extractive metallurgy via pyrometallurgical and/or hydrometallurgical routes. Applications to metallurgical processes for extraction of various metals, including heavy metals (Fe, Ni, Co, Cu, Pb and Zn), light metals (Al and Mg), rare metals (Ti, Mo, W and Re) and precious metals (Au, Ag and Pt), are reviewed and discussed.

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Section: Applications Of Microwave Energy To Metallurgymentioning

confidence: 99%

Microwave-assisted metallurgy

Peng

Hwang

2014

International Materials Reviews

183

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“…Furthermore, tungsten has an extremely low vapor pressure not only at room temperature but also at elevated temperatures. Based on these excellent properties, tungsten and its alloys have been widely used in the aerospace, medical, and nuclear industries [ 5 , 6 , 7 ]. It is worth mentioning that tungsten is massively used as a plasma-facing component in nuclear fusion reactors, being the material of choice for the divertor and sometimes even for the entire vessel, which has been driving research on tungsten materials in the last decade.…”

Section: Introductionmentioning

confidence: 99%

Research on Spheroidization of Tungsten Powder from Three Different Raw Materials

et al. 2022

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In this work, three kinds of tungsten powders with different particle sizes were spheroidized by radio-frequency (RF) inductively coupled plasma spheroidization. The spheroidization behavior of these tungsten powders was investigated and compared. The spheroidization effects of irregular tungsten powder improves with the decrease in degree of agglomeration and increases with primary particle size. Spherical tungsten powder from irregular powder with a primary particle size of 19.9 μm and an agglomeration coefficient of 1.59 had the best spheroidization effect; its apparent density, hall flow time, and spheroidization ratio are 9.36 g/cm3, 6.28 s/50 g, and 98%, respectively. The results show that irregular feedstock tungsten powder with a smaller primary particle size and higher agglomeration degree has a poor spheroidization effect because it is easily affected by the gas flow and deviates from the high temperature zone. On the contrary, irregular feedstock tungsten powder with larger primary particle sizes and lower agglomeration degrees has better spheroidization effects.

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“…Nanocrystalline grain size cemented tungsten carbide has significant potential to exhibit superior properties of hardness and toughness resulting in improved performance and life of cutting tools [1][2][3][4][5][6]. The ability to economically manufacture nanocrystalline size tungsten and tungsten carbide powder is critical to obtain cemented tungsten carbide products with nano grain size structure.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past few decades, several processes like wire explosion [9], ball milling [10,11], chemical vapor synthesis [12], plasma synthesis [5,6] etc. were developed to synthesize nano size tungsten powder.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of nanocrystalline tungsten and tungsten carbide powders in a single step via thermal plasma technique

Enneti

2015

International Journal of Refractory Metals and Hard Materials

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Nanostructured α/β-tungsten by reduction of WO3 under microwave plasma

Cited by 26 publications

References 21 publications

Microwave-assisted metallurgy

Microwave-assisted metallurgy

Research on Spheroidization of Tungsten Powder from Three Different Raw Materials

Synthesis of nanocrystalline tungsten and tungsten carbide powders in a single step via thermal plasma technique

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