Miao Liu , Xingming Yang , Zhongqiu Liu , Baokuan Li
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引用次数: 0
Abstract
Enhancing the quality of the powder bed can significantly lower the defects in the finished product manufactured by Laser-based powder bed fusion. In this work, the multi-factor effects of particle size distribution, scraper type, laying speed, scraper and substrate separation, and non-spherical particles were investigated using the discrete element method. The results show that the powder bed created by the roller can hold the largest number of particles, with a maximum gap of 67.64 %. The scraper angle will significantly impact the force and volume of the deposited particles. Accelerating the laying speed worsens the powder disturbance and raises the impact on the scraper. Non-spherical particles have less effect than particle size, which raises the force and frequency of pushing on the scraper and the friction between the particles. In addition, the slender particles have the most significant impact on the fluidity.
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.
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