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Metal powder

About: Metal powder is a research topic. Over the lifetime, 15840 publications have been published within this topic receiving 115193 citations. The topic is also known as: bronze powder.


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Journal ArticleDOI
John Banhart1
TL;DR: The possibilities for manufacturing metal foams or other porous metallic structures are reviewed in this article, where various manufacturing processes are classified according to the state of matter in which the metal is processed, such as solid, liquid, gaseous or ionised.

3,294 citations

Journal ArticleDOI
TL;DR: In this paper, the authors study the denudation of metal powders that is observed near the laser scan path as a function of laser parameters and ambient gas pressure and show that the observed depletion of metal powder particles in the zone immediately surrounding the solidified track is due to a competition between outward metal vapor flux directed away from the laser spot and entrainment of powder particles.

587 citations

Journal ArticleDOI
TL;DR: In this paper, computational fluid dynamics (CFD) and extensive spray tests were performed for detailed analyses of the cold spray process, and the modeling of the gas and particle flow field for different nozzle geometries and process parameters in correlation with the results of the experiments reveal that adhesion only occurs when the powder particles exceed a critical impact velocity that is specific to the spray material.
Abstract: In this study, computational fluid dynamics (CFD) and extensive spray tests were performed for detailed analyses of the cold spray process. The modeling of the gas and particle flow field for different nozzle geometries and process parameters in correlation with the results of the experiments reveal that adhesion only occurs when the powder particles exceed a critical impact velocity that is specific to the spray material. For spherical copper powder with low oxygen content, the critical velocity was determined to be about 570 m/s. With nitrogen as the process gas and particle grain sizes from 5–25 µm, deposition efficiencies of more than 70% were achieved. The cold sprayed coatings show negligible porosity and oxygen contents comparable to the initial powder feedstock. Therefore, properties such as the electrical conductivity at room temperature correspond to those of the bulk material. The methods presented here can also be applied to develop strategies for cold spraying of other materials such as zinc, stainless steel, or nickel-based super-alloys.

540 citations

Journal ArticleDOI
TL;DR: Porous Ti compacts for biomedical applications are successfully fabricated in the porosity range from 50 to 371 vol% by controlling sintering conditions and Ti powder sizes as discussed by the authors, where Young's modulus and bending strength at the porosa of around 30 vol% are found to be similar to those of human cortical bone.

519 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202350
2022137
2021202
2020592
2019827
2018906