A5029312135- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Advanced materials and composites
- Advanced Surface Polishing Techniques
- Semiconductor materials and devices
- Lubricants and Their Additives
- Advanced ceramic materials synthesis
- Aerogels and thermal insulation
- Advanced machining processes and optimization
- Biodiesel Production and Applications
- Tribology and Wear Analysis
- Nuclear materials and radiation effects
- Banana Cultivation and Research
- Potato Plant Research
- Tunneling and Rock Mechanics
- Magnesium Oxide Properties and Applications
- Silicon Nanostructures and Photoluminescence
- Dental materials and restorations
- Advanced Machining and Optimization Techniques
- Advanced Combustion Engine Technologies
- Hygrothermal properties of building materials
- Boron and Carbon Nanomaterials Research
- High voltage insulation and dielectric phenomena
- Glass properties and applications
- Plant Pathogens and Resistance
Va-Q-tec (Germany)
2020-2021
University of Coimbra
2017
Instituto Pedro Nunes
2017
University of Aveiro
2004-2013
The interfaces of multilayered CVD diamond films grown by the hot-filament technique were characterized with high detail using HRTEM, STEM-EDX, and EELS. results show that at transition from micro- (MCD) to nanocrystalline (NCD), a thin precursor graphitic film is formed, irrespectively NCD gas chemistry used (with or without argon). On contrary, MCD grade free carbon structures other than diamond, result higher substrate temperature more abundant atomic H in chemistry. At those transitions...
New polystyrene (PS) foams with submicron pore sizes and open structure are introduced as potential cores for vacuum insulation panels (VIPs). Measurements of the thermal conductivity λ air-filled evacuated PS foams, influence temperature T, opacifiers well gas pressure p on presented. First results foam microstructures, visualized by electron microscopy, confirm that below 1 µm can be achieved. Thermal values advanced samples in about 7 mW/(m·K) were measured.
Silicon nitride (Si3N4) is known to offer the required adhesion chemically vapor deposited diamond coatings for demanding mechanical solicitations but nature of their strong interface not well know. Focused ion beam preparation preserved such thin layer high resolution transmission electron microscopy. Contrarily earlier suppositions, SiC interlinking particles were found. Instead, shows diamondlike carbon interlayers (approximately 3nm in thickness) intercalated with regions directly-grown...