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INIZIO_TESTO_DA_INDICIZZARE

RESEARCH PROGRAM

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Keywords
MADE IN ITALY, NANOTECHNOLOGIES, COATINGS, FUNCTIONAL PROPERTIES, SURFACE MECHANICAL PROPERTIES

Nanotechnologies and surface functionalisation for made in Italy products

Università degli Studi Roma Tre
Abstract
The main objective of the project will be the application of emerging techniques for surface modification of materials to Made in Italy high value products, with the common purpose of increasing surface hardness and scratch resistance, touching soft feeling, aesthetical properties and durability.
The project will pay attention to the convergence of skills and experience of the research units, which are in the fields of physics, chemistry, engineering and Industrial Design, focusing to the development of new solutions for the automotive, nautical, arts and environment, jewelry fields.
Following these guideline, the research activities will be developed by the R.U. (Research Units) as follows:

R.U. I:
The R.U. I in the frame of the present project will develop a specific surface coating procedure (based on TiCx/a-C:H coatings obtained by plasma enhanced Chemical Vapour Deposition, PE-CVD, techniques) with the aim of obtaining high hardness, high stiffness, low friction nanostructured coatings on titanium alloy components. The required mechanical performances of the components will be resistance to galling, adhesive wear and scratch.
The characterization activities of the research unit #1 will be dedicated also to samples produced by the other research units, with the main aim of obtaining information at both micro scale and nano scale of their mechanical properties and their correlation with functional properties.
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Principal Investigator
Fabio Carassiti Università degli Studi ROMA TRE
Research Objectives
The development of globalization process and the presence of new conteders on international background, influence on Competitive position of our country.
Made in Italy suggest same product of italian factories and craft characterized to known brand and many properties, about design, aesthetics, tact pleasantness, quality and performance (crash resistance, scratch resistance and degradation). Thanks to this qualities, Italian products excel in international business competition.
Some examples in which are presents the italian expressions, are automotive, as cars (engine, components of cars), bike and motorbike and commercial vehicles, fashion industry and craft, for example jewellery, leather store, clothing and footwear.
The Made in Italy production represents a strong point of national productions; moreover the Made in Italy product marks themselves for innovative design and high quality materials.
Moreover penetration in international market about Made in Italy products, is essentially due to two important parameters (competitiveness and innovation).
The research project is finalized to realize competitive and innovative products about technological point of view, addressing the research to nanotechnologies That are gain relevance ), from organizational point of view due to necessary a synergy among scientific areas, to end, creative point of view, main requirement to impose ours products on the markets.
The new politics of Made in >>>

First Results
The results expected by research unit (RU) #1, in the frame of the present project, will consist of the development of a specific surface coating procedure (based on TiCx/a-C:H coatings obtained by plasma enhanced Chemical Vapour Deposition, PE-CVD, techniques) with the aim of obtaining high hardness, high stiffness, low friction nanostructured coatings on titanium alloy components. The required mechanical performances of the components will be resistance to galling, adhesive wear and scratch.
In particular, possible applications of anti-galling nanostructured coatings on titanium alloy substrate are expected in the aeronautic field, with particular focus on engines.
Fix components (stators, internal duct) and rotors present in a compressor both at high and low pressure, can work up to 700 °K; furthermore the presence of dust and abrading particle within the flux make the use of nanostructured wear resistant coatings absolutely necessary in case of titanium alloys.
In the automotive field the use of titanium alloys is particularly effective in case of concentrated loads and high contact stress (connecting rods, camshaft, crank pin, piston pin, valves).
Also in this case the use of nanostructured coatings would allow a significant increase of mechanical performances.
In the nautical field the use of titanium alloys is focused on yacht accessories, water jet propulsion, engine shaft.
The obtained know-how will allow a proper design of >>>

Timescale
24 months
National and international background
UR.I
Titanium and its alloys particularly are suitable candidates for biomedical, aerospace and extreme mechanical applications.
Plasma nitriding and PVD coating are commercial methods for improving properties in those applications which involve high contact stresses and severe sliding wear.
However, a very thin, hard layer on a Titanium alloy substrate (even if hardened by plasma nitriding) cannot lead to a mechanically improved structure in terms of load bearing capacity: differences in both coating and substrate hardness and stiffness do not provide a good distribution of contact stresses, while the presence of localised cracks under contact or tribological loads can generate galvanic corrosion between substrate and the PVD coating.
It is therefore clear that a coating procedure for titanium alloys is not straightforward, because of the complex interaction (both mechanical and chemical) between coating, substrate.
Surface treatments or coatings of titanium alloys show considerable promise for suppression of ‘galling’—a wear mechanism arising from the sliding contact of metallic surfaces in the absence of lubrication Galling has been defined by ASTM as ‘a form of surface damage arising between sliding solids, distinguished by macroscopic, usually localised, roughening and creation of protrusions above the original surface. It often includes plastic flow, or material transfer, or both’. The mechanism of galling involves extensive local >>>