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Dive into the research topics where Silvia Maria Deambrosis is active.

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Featured researches published by Silvia Maria Deambrosis.


Review of Scientific Instruments | 2016

Design optimization of RF lines in vacuum environment for the MITICA experiment

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

Thermal Shock and Oxidation Behavior of HiPIMS TiAlN Coatings Grown on Ti-48Al-2Cr-2Nb Intermetallic Alloy

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

Effect of alumina coatings on corrosion protection of steels in molten lead

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

Structural, morphological and mechanical characterization of Mo sputtered coatings

Silvia Maria Deambrosis; Enrico Miorin; Francesco Montagner; Valentina Zin; Monica Fabrizio; Marco Sebastiani; Federico Massimi; Edoardo Bemporad


Ceramics International | 2017

Cyclic oxidation in burner rig of TiAlN coating deposited on Ti-48Al-2Cr-2Nb by reactive HiPIMS

Claudio Francesco Badini; Silvia Maria Deambrosis; Oxana Ostrovskaya; Valentina Zin; Elisa Padovano; E. Miorin; Micaela Castellino; Sara Biamino


Tribology International | 2018

Mechanical properties and tribological behaviour of Mo-N coatings deposited via high power impulse magnetron sputtering on temperature sensitive substrates

Valentina Zin; Enrico Miorin; Silvia Maria Deambrosis; Francesco Montagner; Monica Fabrizio


Journal of Fusion Energy | 2013

Removing of Mixed Coatings by Plasma Discharges

E. Vassallo; R. Caniello; Silvia Maria Deambrosis; David Dellasega; F. Ghezzi; L. Laguardia; E. Miorin; M. Passoni


Surface & Coatings Technology | 2018

Ti1−xAlxN coatings by Reactive High Power Impulse Magnetron Sputtering: film/substrate interface effect on residual stress and high temperature oxidation

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

反応性H iPIMSによるTi48Al2Cr2Nb上に堆積したTiAlN被覆のバーナリグにおける繰返し酸化【Powered by NICT】

Claudio Francesco Badini; Silvia Maria Deambrosis; Oxana Ostrovskaya; Valentina Zin; Elisa Padovano; E. Miorin; Micaela Castellino; Sara Biamino


Journal of Fusion Energy | 2015

Effects of Nitrogen Concentration on Microstructure of Tungsten Coatings Synthesized by Plasma Sputtering Method

E. Vassallo; G. Angella; R. Caniello; Silvia Maria Deambrosis; F. Inzoli; E. Miorin; M. Pedroni

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Valentina Zin

National Research Council

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Enrico Miorin

National Research Council

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Monica Fabrizio

National Research Council

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E. Miorin

National Research Council

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Micaela Castellino

Istituto Italiano di Tecnologia

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