Sabrina Alam Khan , Mohammad Reza Vaziri Sereshk , Benjamin D. Nelson
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引用次数: 0
Abstract
Ultrasonic atomization (UA) machines have recently been developed and presented to the market, leading to the need for understanding the characteristics of the produced powders. The current focus in characterizing UA fabricated powders is on assessing flowability, particle size distribution, and powder morphology. However, there is a lack of detailed evaluation of the chemical composition of the fabricated powders, which is crucial in determining the mechanical properties of the parts made from these powders. For the first time, intense Energy Dispersive X-ray Analysis (EDS) was conducted on a substantial number of custom powders of Fe-xMn alloy produced using the UA technique. The powders exhibited a highly spherical shape with a narrow size distribution, primarily within the range of 35–55 μm, making them very promising for 3D printing applications. However, the EDS results indicated that segregation or depletion of Mn occurred during particle formation and is associated with the surface area to volume ratio of the produced powders. When the ratio is greater than 0.1, the particles are entirely depleted of Mn, and an abnormally high concentration of Mn was detected for ratios less than 0.1. We have proposed a schematic model of the UA process during particle formation that takes into account the segregation behavior of Mn based on the particle size of the produced powder.
期刊介绍:
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.