metallic materials group chemistry department · possible thesis: wick for heat pipe the wick is...
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Metallic Materials Group Chemistry Department
Prof. L. Battezzati, Prof. M. Baricco, Prof.ssa P. Rizzi*, Dr. A. Castellero
*e-mail: [email protected]
Tel.: 011-6707565
http://momo.ch.unito.it
http://www.chimica.unito.it/do/gruppi.pl/Show?_id=cpcf
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Additive manufacturing
Nanoporous metals
Thermophysical properties of advanced metallic materials
Energy storage and energy harvesting
Energy storage from renewable sources
Thermal energy harvesting: thermoelectric materials
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Additive manufacturing
• highly customized production • minimizing stock • components weigth reduction
STAMP project financed by Regione Piemonte
Laser melting of metal powders using a CAD design
Industry 4.0: new production methods
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Studies on the influence of process conditions: • Phase selection (non-equilibrium phase
diagram calculations) • Microstructures • Mechanical properties
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Advanced sensors and catalysts: nanoporous Au VitriMetTech project , FP7-PEOPLE-2013-ITN – Marie-Curie Action
BINGO project financed by Compagnia di San Paolo
De-alloying of Au based alloys: a) Crystallines b) Amorphous
nanoporous Au (NPG)
Study of: mechanism and kinetics of de-alloying, ligament morphology
200 nm
500 nm
FESEM STEM
HRTEM
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Electrocatalysis: methanol oxidation Methanol Fuel Cell for energy production • Effect of de-alloying time on current density • Effect of number of cycles on current density
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NPG functionalization Sensors for the detection of proteins/molecules in low concentration for: Point of care, airports (detection of explosives), weareable sensors
Surface enhanced Raman scattering (SERS)
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Thermophysical properties of advanced metallic materials
Project financed by European Space Agency
Studies of advanced metallic materials
Superalloys
High Entropy Alloys (HEA) Metallic glasses
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Measurement of: • Specific heat • Melting entalpies • Range of melting and solidification
Study of: • Containerless solidification • Liquid undercooling
Goals
Comparison of data obtained with experiments made on space station
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Energy storage and energy harvesting
• hydrogen technologies • thermal energy harvesting • development of new materials and processes •energy storage from renewable sources
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Energy storage from renewable sources
Need to optimize the storage of hydrogen as an energy carrier for stationary and mobile applications
APU installed on IVECO Daily
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Project financed by : Fuel Cells and Hydrogen Joint
Undertaking; Regione Piemonte
Mobile applications: hydrogen storage Scientific goals:
Solid state hydrogen storage Integration with hydrogen fuel cells
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Complex hydrides and intermetallics with high H2 gravimetric density: • Phase transformation • non-equilibrium phase diagram calculations • Life Cycle Analisys (LCA)
Development of advanced materials
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Conversion of thermal energy in electric energy
Seebeck effect (thermic -> electric)
V = T
Peltier effect
Thermal energy harvesting: thermoelectric materials
Project financed by Fondazione Cassa di Risparmio di Torino
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Open Die Pressing (ODP)
Powder sintering Electro Sinter Forging (ESF)
Carico
Piastre riscaldate
Tubo Fe
powder
Preriscaldo: 10 min Sinterizzazione: 10 min
deformation: 30 sec Process time 0.1 s
Melting techniques Synthesis of materials
Θ=
5 m
m
Θ =
3 m
m
Θ =
2 m
m
Soldification rate
Thermod. equilibrium Metastable Conditions
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300 400 500 600 700
80
100
120
140
160
180
Se
eb
ec
k c
oe
ffic
ien
t (
V/K
)
ODP - RS (after cycling)
MA
ODP - MA (after cycling)
Temperature (K)
Effect of syntering on mechanical and thermoelectric properties of Zn4Sb3
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Possible thesis: wick for heat pipe
The wick is one of the pricipal components in an heat excanger (loop heat pipe), that allows the heat transfer from a warm area (evaporator) to a cold area (condenser)
Regional project to be financed
Powder sintering in collaboration with Argotec