Jesús Cintas

Abstract: A new equation for calculating the electrical conductivity of sintered powder compacts is proposed. In this equation, the effective resistivity of porous compacts is a function of the fully dense material conductivity, the porosity of the compact and the tap porosity of the starting powder. The new equation is applicable to powder sintered compacts from zero porosity to tap porosity. A connection between this equation and the percolation conduction theory is stated. The proposed equation has been experimentally validated with sintered compacts of six different metallic powders. Results confirm very good agreement with theoretical predictions.

TL;DR: In this article, a literature review of the experimental data and different authors' proposed equations related to the measurement and modelling of the electrical conductivity of metal foams is presented, based on the classification scheme that considers two different foam categories: open-cell and closed-cell foams.

TL;DR: High-strength Al has been produced by attrition milling in ammonia gas atmosphere and powder consolidation by cold pressing and sintering as discussed by the authors, which has a high tensile strength (515 MPa) and its high-temperature behaviour is outstanding.

TL;DR: In this paper, an equation for calculating the electrical resistivity of a compressed powder mass, consisting of oxide-coated metal particles, has been derived, which is useful for describing the very early stages of electrical sintering processes.

TL;DR: Photogrammetry in a scanning electron microscope (SEM) is applied to study the three-dimensional shape and surface texture of a nanoscale LiTi2(PO4)3 particle using free software (freeware) and does not require special sample preparation.