María José Quintana, PhD has an European Doctorate in Science and Technology of Materials from the University of Oviedo (Spain), and is a professor and researcher in the Materials group in the Panamerican University (Mexico). Dr. Quintana works on subjects of molding, thermomechanical treatments of steels, superplasticity of metals, microscopy and mechanical properties of materials, among others. The late José Antonio Pero-Sanz, PhD (2012) had a Doctorate in Engineering from the University of Barcelona (Spain). He was a founding member of the International Metallographic Society (USA), a fellow of the Institute of Materials, Minerals and Mining (UK) and Membre d'Honneur of the Société Française de Métallurgie et des Matériaux. He consulted on Physical Metallurgy matters for the United Nations Industrial Development Organization (UNIDO) as well as for Arcelor Mittal-Europe and was a member of the Conseil Scientifique des Usines Renault. Dr. Pero-Sanz was the Head of Research for more than 30 years of the Materials group in the Oviedo and Madrid Schools of Mines. Luis Felipe Verdeja, PhD has a Doctorate in Chemical Sciences from the University of Oviedo (Spain), and is a professor of Materials Science in the University of Oviedo as well as Head of the Siderurgy, Metals and Materials Group (Sid-Met-Mat). Professor Verdeja is the author of various books such as Metalurgia Extractiva and Materiales Refractarios y Cerámicos (in both Spanish and English versions: Refractory and Ceramic Materials). His work is related to steels and aids for the industry, such as refractories and other non-metallic materials.