Silvia Maria Deambrosis
National Research Council
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Publication
Featured researches published by Silvia Maria Deambrosis.
Review of Scientific Instruments | 2016
Michela De Muri; M. Pavei; F. Rossetto; D. Marcuzzi; Enrico Miorin; Silvia Maria Deambrosis
This contribution regards the Radio Frequency (RF) transmission line of the Megavolt ITER Injector and Concept Advancement (MITICA) experiment. The original design considered copper coaxial lines of 1″ 5/8, but thermal simulations under operating conditions showed maximum temperatures of the lines at regime not compatible with the prescription of the component manufacturer. Hence, an optimization of the design was necessary. Enhancing thermal radiation and increasing the conductor size were considered for design optimization: thermal analyses were carried out to calculate the temperature of MITICA RF lines during operation, as a function of the emissivity value and of other geometrical parameters. Five coating products to increase the conductor surface emissivity were tested, measuring the outgassing behavior of the selected products and the obtained emissivity values.
Materials | 2016
Claudio Francesco Badini; Silvia Maria Deambrosis; Elisa Padovano; Monica Fabrizio; Oxana Ostrovskaya; Enrico Miorin; Giuseppe D’Amico; Francesco Montagner; Sara Biamino; Valentina Zin
A High Power Impulse Magnetron Sputtering (HiPIMS) method for depositing TiAlN environmental barrier coatings on the surface of Ti-48Al-2Cr-2Nb alloy was developed in view of their exploitation in turbine engines. Three differently engineered TiAlN films were processed and their performance compared. Bare intermetallic alloy coupons and coated specimens were submitted to thermal cycling under oxidizing atmosphere up to 850 °C or 950 °C, at high heating and cooling rates. For this purpose, a burner rig able to simulate the operating conditions of the different stages of turbine engines was used. Microstructures of the samples were compared before and after each test using several techniques (microscopy, XRD, and XPS). Coating-intermetallic substrate adhesion and tribological properties were investigated too. All the TiAlN films provided a remarkable increase in oxidation resistance. Good adhesion properties were observed even after repeated thermal shocks. HiPIMS pretreatments of the substrate surfaces performed before the coating deposition significantly affected the oxidation rate, the oxide layer composition and the coating/substrate adhesion.
Journal of Vacuum Science & Technology. B. Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena | 2018
Espedito Vassallo; Matteo Pedroni; Valentina Spampinato; Silvia Maria Deambrosis; Enrico Miorin; Enrica Ricci; Valentina Zin
Lead alloys are attractive candidates as coolants for future generation nuclear reactors (fast reactors). Unfortunately, they easily corrode structural steels of reactors. To mitigate this phenomenon, surface protective coatings may be applied. In this study, T91 steel (Cr9Mo1) samples were coated with aluminum oxide coatings (Al-O) deposited by radio frequency magnetron sputtering. The alumina coatings were characterized using scanning electron microscopy–energy dispersive spectroscopy, x-ray diffraction, and tribological techniques. A corrosion test of coated steel samples was performed in stagnant lead at 550 °C for 1200 h and none of the samples revealed corrosion signs.
Surface & Coatings Technology | 2015
Silvia Maria Deambrosis; Enrico Miorin; Francesco Montagner; Valentina Zin; Monica Fabrizio; Marco Sebastiani; Federico Massimi; Edoardo Bemporad
Ceramics International | 2017
Claudio Francesco Badini; Silvia Maria Deambrosis; Oxana Ostrovskaya; Valentina Zin; Elisa Padovano; E. Miorin; Micaela Castellino; Sara Biamino
Tribology International | 2018
Valentina Zin; Enrico Miorin; Silvia Maria Deambrosis; Francesco Montagner; Monica Fabrizio
Journal of Fusion Energy | 2013
E. Vassallo; R. Caniello; Silvia Maria Deambrosis; David Dellasega; F. Ghezzi; L. Laguardia; E. Miorin; M. Passoni
Surface & Coatings Technology | 2018
Silvia Maria Deambrosis; Francesco Montagner; Valentina Zin; Monica Fabrizio; Claudio Francesco Badini; Elisa Padovano; Marco Sebastiani; Edoardo Bemporad; Katya Brunelli; Enrico Miorin
Ceramics International | 2017
Claudio Francesco Badini; Silvia Maria Deambrosis; Oxana Ostrovskaya; Valentina Zin; Elisa Padovano; E. Miorin; Micaela Castellino; Sara Biamino
Journal of Fusion Energy | 2015
E. Vassallo; G. Angella; R. Caniello; Silvia Maria Deambrosis; F. Inzoli; E. Miorin; M. Pedroni