Fabrication of spherical Ti-6Al-4V powder by RF plasma spheroidization combined with mechanical alloying and spray granulation

Spherical molybdenum powders were synthesized by (RF) plasma with irregular molybdenum powders. The powder characteristics and spheroidization efficiency of the feeding rate for obtain the spherical molybdenum powders were studied. The phase composition and morphological properties of the powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). As a result, the fine spherical powders composed of pure molybdenum with favorable dispersity and its surface became smooth. The spheroidization efficiency of synthesized powders was almost 100 % at feeding rate of 5g/min. LMS analysis indicated that the as-prepared powder had narrow particle size distribution and the spheroidization efficiency of the sample decreases gradually as increasing of the feeding rate. The RF plasma spheroidization of molybdenum powder is an ideal route synthesis of well- spherical molybdenum powders used as near net-shape technology and powder metallurgy.

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Thermal plasma spheroidization of Nb-16Si powder alloy obtained by mechanical alloying

Advanced Materials Letters ◽

10.5185/amlett.2018.7073 ◽

2018 ◽

Vol 9 (1) ◽

pp. 86-90 ◽

Cited By ~ 4

Author(s):

Nikolay G. Razumov ◽

Anatoly A. Popovich ◽

Andrey V. Samokhin ◽

Aleksei V. Grigoriev

Keyword(s):

Mechanical Alloying ◽

Thermal Plasma ◽

Powder Alloy ◽

Plasma Spheroidization

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Synthesis of titanium orthorhombic alloy spherical powders by mechanical alloying and plasma spheroidization processes

Materials Letters ◽

10.1016/j.matlet.2019.126615 ◽

2019 ◽

Vol 256 ◽

pp. 126615 ◽

Cited By ~ 9

Author(s):

Igor Polozov ◽

Nikolay Razumov ◽

Tagir Makhmutov ◽

Alexey Silin ◽

Artem Kim ◽

...

Keyword(s):

Mechanical Alloying ◽

Plasma Spheroidization ◽

Orthorhombic Alloy

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Structure Evolution of Ni36Al27Co37 Alloy in the Process of Mechanical Alloying and Plasma Spheroidization

Metals ◽

10.3390/met11101557 ◽

2021 ◽

Vol 11 (10) ◽

pp. 1557

Author(s):

Alina K. Mazeeva ◽

Artem Kim ◽

Nikolay E. Ozerskoi ◽

Aleksey I. Shamshurin ◽

Nikolay G. Razumov ◽

...

Keyword(s):

Particle Size ◽

Mechanical Alloying ◽

Ferromagnetic Material ◽

Planetary Mill ◽

Structure Evolution ◽

Minimal Amount ◽

Magnetic Composites ◽

Spherical Powder ◽

Plasma Spheroidization ◽

Lamella Thickness

In this paper, a novel approach to obtain a ferromagnetic material for smart applications was implied. A combination of mechanical alloying (MA) and plasma spheroidization (PS) was applied to produce Ni36Al27Co37 spherical powder. Then its structure was systematically studied. It was shown that homogenization of the structure occurs due to mechanism of layered structure formation. The dependence of the lamella thickness on the energy dose input at MA was defined. It was found that 14.7 W⋅h/g is sufficient to obtain lamella thickness of 1 μm and less. The low-energy mode of a planetary mill with rotation speeds of the main disk/bowl of 150/−300 rpm makes it possible to achieve a uniform element distribution upon a minimal amount of impurity. During MA in an attritor Ni3Al-type intermetallic compounds are formed that result in more intensive degradation in particle size. Plasma spheroidization of the powder after MA allowed obtaining Ni36Al27Co37 spherical powder. The powder had a fine β + γ-structure. The particle size distribution remains almost unchanged compared to the MA stage. Coercivity of the powder is 79 Oe. The powder obtained meets the requirements of selective laser melting technology, but also can be utilized as a functional filler in various magnetic composites.

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Synthesis of Nb-based powder alloy by mechanical alloying and plasma spheroidization processes for additive manufacturing

Materials Letters ◽

10.1016/j.matlet.2019.03.014 ◽

2019 ◽

Vol 245 ◽

pp. 188-191 ◽

Cited By ~ 20

Author(s):

I.S. Goncharov ◽

N.G. Razumov ◽

A.O. Silin ◽

N.E. Ozerskoi ◽

A.I. Shamshurin ◽

...

Keyword(s):

Additive Manufacturing ◽

Mechanical Alloying ◽

Powder Alloy ◽

Plasma Spheroidization

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Study on Spheroidization of Tungsten Powders by RF Plasma Processing

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.295-297.135 ◽

2011 ◽

Vol 295-297 ◽

pp. 135-139 ◽

Cited By ~ 2

Author(s):

Yan Wei Sheng ◽

Jun Jie Hao ◽

Zhi Meng Guo

Keyword(s):

Feeding Rate ◽

Tungsten Powder ◽

Thermal Spraying ◽

Argon Plasma ◽

Rf Plasma ◽

Spherical Powder ◽

Moulding Process ◽

Plasma Spheroidization ◽

Injection Moulding Process ◽

Tungsten Powders

Spherical tungsten powders were synthesized by (RF) argon plasma with irregular tungsten powders in this paper. The microstructure and crystallographic phases of the synthesized powders were characterized using scanning electron microscopy (SEM) and X-ray diffractometry (XRD). The results showed that fine spherical powder composed of pure tungsten phase with favorable dispersity and its surface becomes smooth. The spheroidization efficiency of synthesized powders was almost 100 %, and the particle size distribution became narrower after spheroidization treatment. The spheroidization efficiency of the sample decreases gradually as increasing of the feeding rate. The RF plasma spheroidization of tungsten powder is an ideal route synthesis of well- spherical metallic tungsten powders which is widely used in thermal spraying and metal injection moulding process.

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