The changes in the surface phase and the morphology of nickel–yttria stabilized zirconia (YSZ) cermet anodes for solid oxide fuel cells (SOFCs) upon exposure to a fuel containing 100 parts per million (ppm)-level hydrogen sulfide (H2S) at elevated temperatures were investigated using in situ Raman microspectroscopy as well as ex situ techniques such as X-ray diffraction (XRD), scanning electron...

The electrochemical deposition of Cu into 0.12 cm and 60 μm thick, highly porous 65 vol % Ni/yttriastabilized zirconia (YSZ) cermets was investigated. An electrochemical cell in which the electrolyte solution was allowed to flow through a porous Ni/YSZ substrate was used to eliminate mass-transfer limitations and to determine the conditions for which the potential drop in the electrolyte soluti...

The redox properties of gadolinium doped ceria (CGO) and nickel oxide (NiO) composite cermets underpin the operation of solid oxide electrochemical cells. Although these systems have been widely studied, a full comprehension of the reaction dynamics at the interface of these materials is lacking. Here, in situ Raman spectroscopic monitoring of the redox cycle is used to investigate the interpla...

The effect of heat input on the microstructure and mechanical properties TiC cermet in MIG welding has been comprehensively investigated by Gleeble simulation. microstructure, phase composition shear fracture were examined OM (optical microscopy), SEM (scanning electron microscope), TEM (transmission microscope) XRD (X-ray diffraction) analyses. results show that a significant cermet. With part...

Cermet is an advanced class of material consisting a hard ceramic phase along with metallic binding the combined advantages both and metal phase. The superior properties this materials are particularly useful in high-temperature, tribological, machining applications. This review paper seeks to provide comprehensive overview various cermet systems. More specifically, most commonly used systems b...

A ceramic–metal composite (cermet) of uranium nitride (UN) particles embedded in a tungsten-molybdenum (W/Mo) alloy matrix is being considered as reactor fuel for nuclear thermal propulsion (NTP). One possible issue the loss fissile atoms during operation. We begin by reviewing historical data that suggest likely mechanism transport free along metal grain boundaries and through cracks to surfac...

Metal sulfides are widely used in a variety of applications requiring high hardness and toughness. In this study, the microstructure and mechanical properties of chromium–chromium sulfide cermets are investigated. The chromium–chromium sulfide cermet was manufactured using self-propagating high-temperature synthesis, a process where the material is created under a self-sustaining combustion rea...

Energy-filtered transmission electron microscopy (EFTEM) can be used to acquire elemental distribution maps at high lateral resolution within short acquisition times, which makes it quite efficient for a detailed characterization of nanostructures, as illustrated with examples concerning a nanostructured substituted La-based cermet compound and a nanoscale multilayer. In the first example, we s...