Scienza e Tecnologia dei Materiali

(dipartimento di Ingegneria, Roma TRE)

Nanotecnologie e

caratterizzazione avanzata al

servizio dell’ingegneria

2013-03

Edoardo Bemporad

www.stm.uniroma3.it

STM Roma TRE channel on YouTube: http://www.youtube.com/user/STMRomaTRE

Image Gallery on flickr http://www.flickr.com/photos/stmdimiuniroma3/

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Research Group presentation

Mission

Vision

Research strategy

People and research Partners

Facilities

Examples from recent work

Spatially resolved residual stress measurement at the micron scale (x,y and z)

Development of novel thin film materials for advanced mechanical application

OUTLINE

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Study of surface properties of systems for advanced mechanical engineering and micro-devices applications, through numerical and analytical modeling, advanced characterization methods, technological, mechanical, tribological and chemical tests.

Development of advanced multi-scale methodology related with morphological, micro-structural and micro-analytical characterization of materials through optical, ionic, electronic and contact probes.

MISSION

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Coupling nano-mechanical testing with high resolution microscopy

High-resolution depth-resolved nano-scale mechanical characterization of engineered surfaces and multiphase materials;

(Sub)microscale analysis of residual stress and stress gradients in thin coatings and complex structures

FIB-SEM-TEM-AFM investigation of nano-scale deformation mechanisms and influence of microstructures on mechanical and functional behavior;

Roughness and inducing roughness methods Vs surface energy: measurement and dependence with surface chemistry

In-house deposition plant

MS-PVD: effect of deposition parameters on performances (adhesion, wear, bio, others..)

VISION

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Product/process innovation

(companies)

Improving of understanding

capabilities

(academic)

new materials and new devices

characterization methods: fine tuning or new applications

Development

Advanced use

Routine use

STM GROUP: VISION Increasing

output quality

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STM GROUP: RESEARCH STRATEGY

Development of methodologies for materials processing optimisation by the use of the paradigm:

nanostructure-microstructure–properties-performances

Multiscale and multidisciplinary approach

Modelling and simulating in service behaviour, reliability and degradation modes (materials oriented)

Optimization and failure analysis

Material system Design

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WE KEEP ATTENTION TO:

Workflow concerns Privacy Timing Cost control Reporting

Data and samples handling concerns

Redoundancy Affordability Accessibility Privacy Report standardization (Corporate Identity)

Everything is managed inside our intranet using

Microsoft Sharepoint™ CMS

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five staff unities

two full tenured professors

three researchers

one tenured technician

A team, financed mainly through research projects:

Four fellowship researchers

three doctoral students

one person with technical-administrative role

Manpower comprises also other master graduate in mechanical engineering involved in training activities concerned with research

projects supported by industrial enterprises and undergraduate students in mechanical engineering which are carrying out their

final master thesis work.

STM PEOPLE Edoard

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PRINCIPAL RESEARCH PARTNERS (CUSTOMERS)

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Italy

INFN – Laboratori Nazionali di Legnaro (Pd)

ENEA Casaccia dipartimento Materiali (RM)

Centro Sviluppo Materiali (RM)

Italian University Consortium on materials science and technology - INSTM

National Research Council (CNR) Department of Molecular Design

Universities Milano, Torino, Napoli, Modena, Roma 1,

Roma 2, Brescia, Cagliari, Firenze

Worldwide

Oak Ridge National Laboratory (ORNL, TN, USA)

University of Tennessee (TN, USA)

University of Oxford, Department of Engineering Science (UK)

Karlsruhe Institute of Technology (KIT, Germany)

SIOMEC (Saxonian Institute of Surface Mechanics) and Technische Universität Chemnitz, (Germany)

Lille University, Laboratoire de Mécanique (France)

Central University of Venezuela, School of Metallurgy and Materials Science (Venezuela)

University of Rosario (Argentina)

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Several Private Firms

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STM FACILITIES: 4 LABORATORIES (500m2 tot)

1. LIME, Electron Microscopy lab

Ion / Electronic / Stylus / Optical

2. MatEDP, Materials Modeling lab

15 PC stations, Thermocalc, ANSYS, ABAQUS, Elastica, EFS,…

3. MaTec, Materials Technology lab

Mechanical characterization (Hardness, Micro-hardness, Nano-hardness, Abrasive Wear, Scratch), Salt Spray

4. MaDep, Coating technologies Lab

Magnetron Sputtering for residual stress investigation (duty cycle, bias, thicknesses, chemistry, process gases…)

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Coating Deposition: Lab scale Magnetron Sputtering – Physical Vapour Deposition system

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MADEP, MS PVD EQUIPMENT

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Surface modification: Flame treatment system (home made)

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IMPROVEMENT AND OPTIMIZATION OF THE SURFACE FREE ENERGY OF POLYMERIC SUBSTRATES BY FLAME TREATMENT

Process parameters observed: 1. Total flow rate; 2. Oxygen/propane ratio; 3. Distance sample-tip nozzle; 4. Frequency of sample pass on

flame; 5. Total time treatment.

Some results obtained through DOE Technique

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2D Imaging and nanofabrication: Optical microscopes, Scanning electron microscope, Transmission electron microscope and Ion Beam / dual Beam microscope

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LIME LAB: SEM (FEI)

30 Kv LaB6 filament

Secondary electrons

Backscattered electrons

EDS to B, line & maps

Cathode luminescence

Specimen Current

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LIME LAB: TEM (FEI)

120kV LaB6 filament

Double tilt

EDS to B, point & line

nanoprobe

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LIME LAB: DUALBEAM (FEI) HELIOS 600 NANOLAB

early 2008

- Omnprobe - GIS (4 gases) - STEM - EDS (Oxford)

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3D Imaging, contact and non contact probes: AFM, Confocal and Interferometric optical microscopes

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LIME LAB: AFMS (1 NT-MDT + 1 DI)

50x50x5 microns range

All modes (contact, non

contact, lateral force,…)

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PROFILOMETER (NON CONTACT, BOTH CONFOCAL AND INTERFEROMETRIC)

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Interferometric

head:

(sub)nanometer

resolution in

roughness analysis

Confocal head: analysis of complex shapes with high z-range

µm

-5

-4.5

-4

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

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2.5

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3.5

4

9.32 µm

0.715 mm 0.7 mm

Alpha = 45° Beta = 30°

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Composition and microstructure: Energy Dispersive Spectroscopy (on all electron microscopes) and Xray Diffraction

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LIME LAB: DRX

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… COMING SOON..! (2013, THIRD QUARTER)

Surface funcional properties: Wettability, Wear resistance and corrosion test

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MATEC LAB: CONTACT ANGLE AND WETTABILITY

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Uni en 828 and ASTM D5725 - 99

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SEMI-AUTOMATED INSTRUMENT FOR CONTACT ANGLE MEASUREMENT AND SURFACE FREE ENERGY MODELS

Light source,

polarized filter,

screen diffuser

Sample holder(three

axes movement)

12X objectives

Digital Camera to

acquire images on a

PC

SFE models: 1. Zisman 2. Neumann 3. Girifalco 4. Fowkes 5. Owens-Wendt 6. Van Oss-Chaudhury-Good

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MATEC LAB: HOME MADE TRIBOMETER

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MATEC LAB: WEAR TEST Wear test device (prototype)

Dynamic measurement of wear and friction coefficient at the micron scale Campione 004

-505

-504,5

-504

-503,5

-503

-502,5

-502

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150

Tempo [s]

Aff

on

dam

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to

[u

m]

-10

0

10

20

30

40

50

60

Caric

o [

g]

Affondamento

Carico

R2=0,98

001

002 003 004 005

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MATEC LAB: SALT SPRAY 1M3 CHAMBER

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Surface structural properties: Micro and Nano-mechanical test

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MATEC LAB: SCRATCH TESTER

Depth profiling

Applied force feedback controlled

Acoustic emission sensor

Friction force measurement

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MACRO-SCALE INSTRUMENTED SPHERICAL INDENTATION

Prototipal instrument for macro-

scale spherical indentation

The stress-strain curve is obtained by

least-square fitting of exp data with a

FEM-modelled database of L-h curves

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MATEC LAB: HARDNESS TESTERS

Vickers

Knoop

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ROMA TRE NANOHARDNESS TESTER. AGILENT G200. XP AND DCM-II HEADS. ULTRA-FAST MAPPING

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ROMA TRE NANOHARDNESS TESTER

Berkovich tip

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Research Group presentation

Mission

Vision

Research strategy

People and research Partners

Facilities

Examples from recent work

Few short case studies on industry focused research activates

Extended case study: Spatially resolved residual stress measurement at the micron scale (x,y and z)

OUTLINE

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MICRO AND NANO-SCALE SENSOR NETWORKS

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G.Lanzara et al, Advanced Materials, 22, 41,

4643-4648, 2010

Expanded network and folded in 3D

256 micronodes network

Polyimide highly extendible

microwires coated with thin

metal films

Micronodes hosting

sensors/actuators, MEMS or

NEMS

Starting Grant

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MATERIALS FOR ELECTRODES OF LI-BATTERIES

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Electrode:

Particles + Matrix

Use of 2D dynamic nanoindentation mapping and focused ion beam (FIB) observations for the analysis of ithe nano-scale degradation mechanisms of innovative Li-batteries electrodes

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ENGINEEREED MICRO-CAPSULES FOR NEW DETERGENTS

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Focused ion beam section analysis of microcapsules for process optimization;

Nano-mechanical testing on single-capsule for the mechanical characterization and local surface free energy measurement

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NEW NANO-MATERIALS FOR THE SEMICONDUCTOR INDUSTRY

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Compression testing on single octapod-shaped colloidal nano-crystals;

Analysis of single-particle deformation mechanisms and design of new nano-porous film made by particle assembly

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INNOVATION IN ECOGRAPHY SENSORS

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Extensive use of nanoindentation and scratch testing, supported by 3D microscopy and SEM-FIB

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In-line introduction of plasma treatment to improve adhesion

RESIDUAL STRESS MEASUREMENT ON SUSPENDED MICRO-BRIDGES

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FIB-BASED FAILURE ANALYSIS AND NANO-MECHANICAL

CHARACTERIZATION OF MEMS STRUCTURES

calculation of the stiffness of MEMS membrane by the use of a wedge

indenter – spring stiffness taken into account 51

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OTTIMIZZAZIONE DEL COEFFICIENTE D’ATTRITO IN

PNEUMATICI

e.bemporad@stm.uniroma3.it

Acknowledgements:

Fabio Carassiti

Marco Sebastiani

Giulia Lanzara

Daniele De Felicis

Vincenzo Mangione

Mattia Piccoli

Marco Renzelli and

Dragana Nikolic

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