Juan Manuel Montes

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: In this article, a simple new equation for calculating thermal and electrical conductivities of powder sintered compacts is proposed, which is physically applicable from zero porosity to the packing porosity.

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 article, the development of the Electrical Resistance Sintering (ERS) process for the fabrication of hard metals is presented, and the characterization of the produced parts is compared to materials obtained by conventional processes.