Search

Your search keyword '"Perna, Alessia Serena"' showing total 33 results
Start Over Author "Perna, Alessia Serena"
33 results on '"Perna, Alessia Serena"'

13. Experimental analysis of cold sprayed precursors for closed-cells aluminum foams

Author

VISCUSI ANTONIO, PERNA ALESSIA SERENA, ASTARITA ANTONELLO, BORRELLI DOMENICO, CARAVIELLO ANTONIO, SICIGNANO NICOLA, CARRINO LUIGI, Viscusi, Antonio, Perna, ALESSIA SERENA, Astarita, Antonello, Borrelli, Domenico, Caraviello, Antonio, Sicignano, Nicola, and Carrino, Luigi

Subjects
Cold Spray, Metal Foams, Precursors, 3D-Printing, Experimental Analysis
Abstract

Metal foams are a relatively new class of materials with many interesting combinations of physical and mechanical properties. Among them, the closed-cells aluminum foams are the most interesting for structural applications in the aerospace industry. There exist different methods to produce metal foams. An innovative manufacturing technique was developed in this study, proving the possibility to produce closed-cells aluminum foams through the cold spray additive manufacturing technology (CS). In particular, two different sets of samples were produced by varying the cold spray process parameters aiming at: i) studying the advantages and the issues of cold spray for manufacturing precursors for metal foams; ii) analyzing the correlation among the CS printing strategy and parameters, the foaming process and the physical and the morphological characteristics of the resulting foams; iii) finally, finding appropriate conditions to form closed-cells aluminum foams via CS.

Published
2023

24. A novel manufacturing route for integrated 3D-printed composites and cold-sprayed metallic layer.

Author

Viscusi, Antonio, Della Gatta, Roberta, Delloro, Francesco, Papa, Ilaria, Perna, Alessia Serena, and Astarita, Antonello

Subjects
METALLIC composites, METAL coating, RAPID prototyping, COMPOSITE structures, FIBERS, METALLIC surfaces, METALLIC films
Abstract

Polymer matrix composites (PMCs) are the most used in aerospace fields due to their special mechanical properties coupled with reduced weight. Metallic structures can be manufactured on the surface of PMCs producing hybrid constructions with intriguing characteristics. The cold spray technology (CS) seems to be the best solution for the manufacturing of metallic coatings on polymer-based substrates. However, the last researches on PMCs metallization through CS were carried out without taking into account a proper manufacturing of the substrates. Therefore, the customized manufacturing of PMCs used as substrates for CS deposition represents a crucial aspect to be considered, the target surface should be designed and manufactured to fit better the CS requirements. In this scenario, the Fused Filament Fabrication method (FFF) is the best solution for tailored composites manufacturing. Therefore, this work aims to develop a novel manufacturing route to produce innovative composite structures by using the FFF technology for the 3D-printed polymer-based substrate and the cold spray technology for the 3D-printed metal deposition. The novelty is that, for the first time, the polymer-based substrates will be designed and manufactured "ad hoc" for the cold spray metallization by using the rapid prototyping 3D-printing process successfully integrated with CS technology. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

30. Feasibility of steel powder deposition on composites through cold spray.

Author

Della Gatta, Roberta, Viscusi, Antonio, Perna, Alessia Serena, Caraviello, Antonio, and Astarita, Antonello

Subjects
STEEL, COMPOSITE materials, CARRIER gas, POWDERED glass, GLASS fibers
Abstract

The deposition of steel powders on glass fiber reinforced polymer (GFRP) with the Cold Spray technique is investigated. Metallization of composite materials is still challenging when high-strength and dense powders, such as steel, are used due to excessive erosion of the polymer or disruption of the fibers during the deposition. To overcome these issues, low-pressure cold spray equipment has been used for the experimental campaign shown in this paper. Different coatings were obtained by using nitrogen as the carrier gas and different sets of pressure and standoff distance. Optimization of the process parameters, including the stratification of the laminate, has been carried out. Results of an initial study of the feasibility of the process and the influence of the different chosen spray conditions are exposed. In particular, the bonding mechanisms of steel powders and their morphology are discussed. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

31. Cold spray process for the production of AlSi10Mg coatings on glass fibers reinforced polymers.

Author

Della Gatta, Roberta, Viscusi, Antonio, Perna, Alessia Serena, Caraviello, Antonio, and Astarita, Antonello

Subjects
GLASS coatings, GLASS fibers, MANUFACTURING processes, ALUMINUM powder, POLYMERS, GLASS-reinforced plastics
Abstract

Cold spray deposition of aluminum powders on polyethylene reinforced with glass fibers has been studied. Different processing conditions, including different stratifications of the fiber-reinforced polymer used as a substrate, have been investigated to better understand the deposition mechanism. The experimental campaign has been conceived and tailored to highlight the influence of several process parameters on the deposition of the first layer of particles. The results obtained allowed to highlight and clarify the influence of standoff distance and gas pressure and also gave some insights concerning the effect of the substrate stratification. Guidelines regarding the design of the manufacturing process have been also released. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

32. Manufacturing of a Metal Matrix Composite Coating on a Polymer Matrix Composite Through Cold Gas Dynamic Spray Technique

Author

Antonello Astarita, Antonio Viscusi, Massimo Durante, Raffaele Sansone, Luca Boccarusso, Alessia Serena Perna, Luigi Carrino, Perna, ALESSIA SERENA, Viscusi, A., Astarita, A., Boccarusso, L., Carrino, L., Durante, M., and Sansone, R.

Subjects
Thermoplastic, Materials science, ceramic, Composite number, Gas dynamic cold spray, chemistry.chemical_element, 02 engineering and technology, engineering.material, 01 natural sciences, Coating, Aluminium, aluminum powder, 0103 physical sciences, General Materials Science, cold spray, Ceramic, metal matrix composite, Composite material, natural fiber composite, 010302 applied physics, chemistry.chemical_classification, Mechanical Engineering, Metal matrix composite, hemp, Tribology, 021001 nanoscience & nanotechnology, alumina, chemistry, Mechanics of Materials, visual_art, visual_art.visual_art_medium, engineering, 0210 nano-technology
Abstract

In this work, the manufacturing through cold gas dynamic spray (cold spray or CS) of metallic composite coatings of Al-Al2O3 on organic composite substrates with thermoplastic PLA matrix and hemp fibers was studied. Alumina powders, with a mean diameter of 50 μm, were used blended with aluminum powders in three different weight concentration percentages (0, 15, 20, and 45%) as feedstock material in order to highlight and discuss the variations of the coating surface properties depending on the alumina percentage. The coatings were produced by using a low-pressure cold spray equipment. A detailed experimental campaign, including microstructural observations and confocal microscopy, was carried out to study the structure of the coatings. Moreover, the tribological behavior of the coatings was studied through both scratch test and pin-on-disk test. The experiments showed that a small addition of alumina improves the compactness of the coating and its resistance to scratch and wear behavior.

Published
2019

Catalog

Books, media, physical & digital resources
See catalog results