1,721,144 research outputs found
Metodo e apparato per la stampa 3D di gioielli e componenti a alto valore aggiunto
No full textThe building chamber reducer is an aluminium plate with a central 20x20x40 (h) mm3 hole. The plate is 15 mm thick, but its building chamber has a depth of 40 mm. The plate external dimensions have been designed to fit the internal ones of the existing building box. Due to this modification, also the powder bed platform had to be modified to fit the new dimensions of the building plate. The new powder bed platform is divided in two main parts: a cylindrical part and a parallelepiped part with a flat top surface, where the powder will be deposited during the printing. The new system includes two thin aluminium plates connected to the cylindrical part and needed to couple the grasping machine system with the new powder bed platform. Characteristic elements of the invention:
A reducer to diminish the job box of the binder jetting machine aimed at reducing the amount of powder deposited on the building platform.
A customised hopper to store the powder and release it during the deposition phase
Tramoggia con azionamento magnetico per apparato per la stampa 3D di gioielli e componenti multimateriale
No full textEffects Of Feedstock Morphology And Composition On Binder Jetting Of 316L Stainless Steel: A Perspective On Circular Economy
No full textMicrostructure and mechanical behaviour of high speed steel by activated sintering method
No full textMicrostructure and mechanical behaviour of high speed steels by activated sintering method
No full textInvestigating the effect of current density in ultra-fast electrolytic zinc phosphate deposition
Full text linkThe influence of the current density utilized during electrolytic zinc phosphate deposition on the properties of the final coatings has been investigated. The adoption of a concentrated electrolyte allows satisfactory coating properties with current densities as high as 100 mA cm 2, resulting in exceptional deposition rates. The size of the Zn3PO4 crystals was shown to decrease with the current density, which in turn affected the coatings final properties. An explanation to this finding was provided following classical nucleation theory. Samples obtained at 25 and 50 mA cm 2 featured more compact layers while samples obtained at 100 mA cm 2 were thicker but porous. Scratch test was used to assess wear resistance, which was observed to be increasing with the applied current density. The more compact layers obtained at 25 and 50 mA cm 2 provided an enhanced corrosion resistance as highlighted by potentiodynamic polarization and electrochemical impedance spectroscopy. The adoption of an electrolytic setup allowed for co-deposition of metallic Zn which can further protect the steel substrate by galvanic coupling
microstructural and mechanical behaviour of high speed steels by activated sintering method
No full textExperimental assessment to evaluate adhesion in hybrid composite structures containing shape memory alloy layers
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