Silicon carbide (SiC) ceramics show excellent mechanical and thermal properties, combined

This study proposes the assessment of impingement erosion and electrochemical corrosion resistance of two coatings materials deposited by Cold Spray technology and compare them to 440C annealed steel. The tested coating materials were CrMnFeCoNi and WC-Ni, deposited on 2205 duplex stainless steel substrates using nitrogen as process gas. In between the substrate and the high entropy alloy coating, an interlayer coating of 316 stainless steel was used to enable HEA adhesion. The presence of WC particles in the WC-Ni composite coatings was confirmed by SEM cross sectional inspection.

The goal of the Powersail project is to demonstrate the potential of amorphous silicon (a-Si) deposited on ultralight space-grade polyimide for solar power satellites (SPS). State of the art solutions are III-V compound semiconductor triple junction-based PV modules, which are 100 times too expensive and one order of magnitude too heavy to build a competitive SPS with terrestrial microwave energy collection infrastructure.

OOne important constraint in the sizing process of an ablative TPS for atmospheric entry vehicles is the temperature limit of the supporting heatshield structure and of the bonding material used to attach the TPS. This temperature limit is typically in the range of 150-180degC. For the CFRP the limiting factor is typically the resin. New resin materials (like cyanate ester or bismaleimide) have commercially become available in recent years and relevant CFRP materials been qualified towards higher temperature limits for other space applications (like solar arrays or antenna reflectors).

Metallic Glasses (MG) are a class of alloys which retain an amorphous structure in the solid state, when cooled from the liquid state. Formation of a fully amorphous structure for large cross sections (up to > 1 cm) is now possible for several alloying systems referred to as Bulk Metallic Glasses (e.g. Fe-base, Ti-base, Al-base, Mg-base, Ca-base, Zr-base).

Metallic Glasses (MG) are a class of alloys which retain an amorphous structure in the solid state, when cooled from the liquid state. Formation of a fully amorphous structure for large cross sections (up to > 1 cm) is now possible for several alloying systems referred to as Bulk Metallic Glasses (e.g. Fe-base, Ti-base, Al-base, Mg-base, Ca-base, Zr-base).

The main goal of this project was to fabricate porous electrodes used in fuel cells. A porous electrode consists of a catalyst layer (CL), microporous layer (MPL) and gas diffusion layer (GDL). GDLs are conventionally made of carbon paper or cloth. However, there are several drawbacks, including degregation in alkalin media, deformation, and consequently, closure of pores under compression, and randomness of pore charactristics (e.g., pore size and distribution). As an alternative, metallic GDLs with much greater mechanical strengths have recently been introduced for alkalin environements.