Slurry Sintering Research Articles

High temperature oxidation resistance coating on niobium

An ultrahigh temperature oxidation resistance MoSi2 coating on niobium substrate was prepared by a slurry sintering technique. The static antioxidation property was tested at 1600°C. The microstructure and phase composition of the coating were investigated by SEM, EDS, and XRD analysis. Results were correlated to the coating oxidation resistance. The results indicated that, when exposed to a high temperature oxidation atmosphere, the MoSi2 coatings oxidised selectively to form an oxide glass with a self healing function on the coating surface. Any impurities existing in the slurry deteriorated the integrity of the surface, and hence the antioxidation properties of the coating. A transitional layer formed by diffusion was found at the interface between the coating and the substrate.

Control of Micropore Structures of Porous Oxide Plaques for Molten Carbonate Fuel Cells by Slurry Sintering Method (II)

Control of Micropore Structures of Porous Oxide Plaques for Molten Carbonate Fuel Cells by Slurry Sintering Method (II)

Controlling of Micropore Distribution of Porous Gas-Diffusion Electrodes for a Molten Carbonate Fuel Cell by a Slurry Sintering Method (I)

Controlling of Micropore Distribution of Porous Gas-Diffusion Electrodes for a Molten Carbonate Fuel Cell by a Slurry Sintering Method (I)

THE STRUCTURE AND PROPERTIES OF POROUS NICKEL PLAQUES

The structure of porous nickel plaques produced by the following routes has been examined using scanning electron microscopy: (a) pressure-less sintering of nickel powder; (b) slurry sintering of powder; (c) roll-compaction and sintering of powder; (d) pyrolysis of cloth impregnated with nickel chloride. The observations show that measurements of pore-size distribution with a mercury porosimeter can be misleading, and also reveal the existence of fine closed porosity in plaques made from impregnated cloth. The relation of the observed porosity characteristics and inter-particle bond diameters to the mechanical and electrical properties of the plaques is discussed.