Marcelo Henrique Prado da Silva
Military Institute of Engineering – IME, Rio de Janeiro, Brazil
Marcelo Prado is a metallurgical engineer with M.Sc. and Ph.D. on Metallurgical and Materials Science Engineering from the Federal University of Rio de Janeiro (UFRJ, Brazil). Part of the Ph.D. was performed in the Interdisciplinary Research Centre in Biomedical Materials (IRC, Queen Mary and Westfield College, University of London). Marcelo Prado performed a post doctoral research at the National Institute of Biomedical Engineering (INEB), at University of OPorto, Portugal.
Marcelo Prado is currently an Associate Professor in the Military Institute of Engineering (IME, Brazil), being also in chief of the Electron Microscopy Laboratory. He was the President of the International Society for Ceramics in Medicine (ISCM) in 2008 and is currently a permanent member of the Executive Committee of the ISCM.
Develops researches on bioceramics synthesis and processing, bioactive glasses and composites and is involved in related researches as supervisor, member of scientific committee of conferences, referee of scientific journals, and international societies.
NIOBOPHOSPHATE GLASSES FOR BALLISTIC APPLICATIONS
The potential of a niobophosphate glass was investigated with respect to the ability to act as a ceramic shield for multi-layer shields. The glass was designed to have the following molar composition: 30% Nb2O5– 30% P2O5– 20% CaO – 20% CaF2. Glass, heat treated glass (glass ceramic) and alumina-reinforced with glass samples were used as the ceramic component for multi-layer shields.
Ballistic tests were performed in order to assess the residual velocity of the projectile. The results from the residual velocity tests indicated higher energy absorption for the glass-reinforced alumina samples, in comparison to pure alumina, indicating a promise use of this glass for ballistic applications.
Łukasiewicz Research Network
Institute for Ferrous Metallurgy,
Prof. Adam Zieliński is CEO Director at the Łukasiewicz Research Network – Institute for Ferrous Metallurgy. Expert in the area of materials engineering. He is well versed in materials for service at elevated temperatures, in high-temperature creep resistance, in the creep tests, and in diagnostics of the high pressure power-, chemical-, and petrochemical installations. He collaborates closely with the power boilers manufacturers, as well as the power industry repair plants in the area of the power installations diagnostics, residual life and damage processes. He is an author and coauthor of ca. 150 scientific publications worldwide including more than 4 publications in the Philadelphia list, he won 15 awards. He is an author and coauthor more than 400 research and expertise on the direct instructions of the energy industry and petrochemical industry. Prof. Adam Zieliński has h-index 15 in Web of Science, 17 – in Scopus and 22 in Google Scollar.
THE STUDY OF THE EVOLUTION OF THE MICROSTRUCTURE, MECHANICAL AND CREEP PROPERTIES OF AUSTENITIC STAINLESS STEELS AFTER LONG-TERM AGEING
The increase in the efficiency of power units, among others by improving the steam parameters, required a kind of revolution in the field of materials for power engineering. The so-called bainitic steels as well as 9-12%Cr martensitic steels were developed and implemented in the power industry. Martensitic steels may operate at max 620°C, and higher parameters require, due to low corrosion resistance of 9%Cr steels and low microstructural stability of 12%Cr steels, the application of creep-resistant austenitic steels. One of the modern grades in this group of materials are austenitic steels. The introduction of a new steel grade in the power engineering requires adequate knowledge, which is usually preceded by thorough research under the laboratory and industrial conditions. One of the main criteria determining the usefulness of a specific material in the given part of boiler is the stability of its microstructure and mechanical properties at given temperature of expected service.
This research fills in this gap of information by presenting the results of investigations of microstructure and properties of the austenitic steel after long-term ageing at 650, 700 and 750°C