Results 21 to 30 of about 2,192 (300)

Advancement of Powder Spheroidization Process Using a Small Power DC-RF Hybrid Plasma Flow System by Sinusoidal Gas Injection

open access: yesJournal of Fluid Science and Technology, 2011
The effect of sinusoidal central gas injection on the in-flight alumina spheroidization process was experimentally clarified by using DC-RF hybrid plasma flow system under constant low input power.
Juyong JANG   +3 more
doaj   +1 more source

DC Arc Plasma Treatment for Defect Reduction in WC-Co Granulated Powder

open access: yesMetals, 2020
Tungsten carbide–cobalt (WC–Co) agglomerated powder is widely used for additive manufacturing and spray coating, and a reduction in internal gaps in the powder is required to obtain a product of high quality.
Hirotomo Itagaki   +6 more
doaj   +1 more source

Investigation on spheroidization of refractory tungsten powders by laminar DC plasma torch

open access: yesMaterials Research Express, 2022
The spherical tungsten powders were prepared by a low-power DC laminar plasma torch. At a discharge current of 50 A, the tungsten powder fed downstream cannot be spheroidized by using Ar discharge, while a small number of spherical particles can be ...
Y Ma, W Ke, K Yang, X D Zhu
doaj   +1 more source

Investigation of The Effect of Semi-Solid Temperatures and Holding Times at Isothermal Range On Microstructure of AZ31 Mg Alloy

open access: yesGazi Üniversitesi Fen Bilimleri Dergisi, 2023
Mg alloys have poor formability due to their hexagonal tightly packed (HCP) crystal structure, low active shear system at room temperature, and anisotropic behavior in polycrystalline structure.
Bahadır AKGÜN, Kadir KOCATEPE
doaj   +1 more source

Research on Spheroidization of Tungsten Powder from Three Different Raw Materials

open access: yes, 2022
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.
Zhenhua Hao   +11 more
core   +1 more source

Spheroidal Functions [PDF]

open access: yesProceedings of the National Academy of Sciences, 1935
Verf. geht aus von der Differentialgleichung für die rotationssymmetrischen Laméschen Wellenfunktionen in ihrer algebraischen Form, wie sie durch \textit{R. Maclaurin} aufgestellt wurde [Erg. Math. 1, H. 3, 69 (1934)]. Er löst diese Differentialgleichung mit Hilfe einer Reihe von hypergeometrischen Funktionen, welche für den Fall ganzzahliger Indizes ...
openaire   +3 more sources

Synthesis of Multiscale Ultrafine Copper Powder via Radio Frequency Induction Coupled Plasma Treatment

open access: yesMetals, 2022
Nano-sized spherical copper powder has important applications in the fields of microelectronic devices, highly efficient catalysts and lubricant additives.
Haibo Wu   +4 more
doaj   +1 more source

Advanced spheroidal degeneration [PDF]

open access: yesDigital Journal of Ophthalmology, 2019
Spheroidal degeneration, involving the cornea and/or the conjunctiva, is characterized by amber-colored homogeneous, translucent spherules in the corneal stroma, Bowman’s membrane, and subepithelium. The condition has a higher prevalence in areas with extreme temperatures, low humidity, high wind, and presence of sand.
Abdelrahman M, Elhusseiny   +5 more
openaire   +2 more sources

Characterization of Virgin, Re-Used, and Oxygen-Reduced Copper Powders Processed by the Plasma Spheroidization Process

open access: yes, 2023
Fabrication of parts with high mechanical properties heavily depend on the quality of powder deployed in the fabrication process. Copper powder in three different powder types were spheroidized using radio-frequency inductively coupled plasma (ICP ...
Newkirk, Joseph William   +10 more
core   +1 more source

Numerical Simulation of Spheroidization Process of TiAl Alloy Powders in Radio Frequency Plasma

open access: yesJournal of Aeronautical Materials, 2017
A numerical simulation method was used to study the radio frequency plasma spheroidization process of TiAl alloy powder. The effects of velocity field and temperature field on the motion trajectory and mass change of TiAl alloy powder with different ...
ZHU Langping   +4 more
doaj   +1 more source

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