Abstract
Powder metallurgy (PM) is a metal-forming technology that uses powders (metallic and or ceramic) as raw materials which are formed into a specific shape and dimensions and subsequently sintered at high temperature. Using this technology, high performance materials can be obtained, but always depending of the processing route and the type and amount of porosity. In this chapter, a brief review of this technology is made with the objective of attaining the highest level of mechanical and physical properties. For this purpose different alternatives have been chosen: acting over mechanisms apart from the density of the material (the alloying system, the microstructure, the grain size, ...), acting over the density/porosity level and properties of the pores, improving the sintering activity by different routes, and using techniques that avoid the grain growth during sintering.
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