Research

The research performed in the Structural Materials group is focused in the areas of Metallic, Composite, Ceramics and Glass materials.

 

The current research projects are based on the following topics:

- NiTi SMA thermal/mechanical treatments, including nanostructuring (severe plastic deformation) and thin films characterization (in situ XRD analysis).

- Powder metallurgical processing of NiTi shape memory alloys.

- In service behaviour of Ni-Ti superelastic endodontic and orthodontic materials.

- Electrical resistivity studies of shape memory alloys during thermal / mechanical cycling, aiming to monitor deformation of structural components, including simultaneous measurement of electrical resistivity and X-ray diffraction (synchrotron radiation).

- Microstructural and elemental characterization and long term corrosion observations in ancient metallic objects as complementary archaeometallurgy studies.

- Process optimization and modelling of metal matrix functionally graded composites, coupled with microtomographic structural characterization (development of dedicated microtomographic image processing tools). Characterization of wear, corrosion and tribocorrosion behaviour.

- Synthesis and characterization of sol-gel prepared films and sol-gel prepared glasses with relevant functional properties.

- Sintering behaviour of glasses and of glass-nanoceramic particle composites: effect of experimental parameters on the final microstructure, thermal, electrical and optical properties of the composites.

- Recycling of solid wastes by ceramic and glass technology.

- valence plus bonding state of chromophore ions (iron, copper, cobalt) in natural painting pigments and in ancient glazes (Portuguese tiles and faience, Chinese porcelains) using synchrotron radiation;

- binding state of strategic metals - particularly, indium - in sulphide ores using synchrotron radiation;

- Coordination of hazardous metals in sulphates from acid mine drainage (lead in jarosite);

- Matter under extreme (P,T) conditions in the Earth’s interior: crystal chemical approaches. The research performed in the Structural Materials group is focused in the areas of Metallic, Composite, Ceramics and Glass materials.