Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Antonio Augusto Araújo Pinto da Silva"'
Autor:
Ágata Mayara Paula Pontes, Marcela Silva Lamoglia, Leandro Bernardes Serrano, Elioenai Levi Barbedo, Antonio Augusto Araújo Pinto da Silva, Geovani Rodrigues, Gilbert Silva
Publikováno v:
Materials Research, Vol 27 (2024)
Refractory multi-principal element alloys constitute a novel category of metallic materials, and they have good properties, particularly at elevated temperatures. Currently, casting and powder metallurgy stand as the two predominant manufacturing rou
Externí odkaz:
https://doaj.org/article/23b33a4fb6424dfb8e6a8b614512965a
Autor:
Pedro Henrique Gonçalves, Agata Mayara Paula Pontes, Marcela Silva Lamoglia, Bruna Horta Bastos Kuffner, Antonio Augusto Araújo Pinto da Silva, Gilbert Silva
Publikováno v:
Materials Research, Vol 26 (2023)
Vanadis®8 is a high-value tool steel, that undergoes gas atomization and hot isostatic pressing during production , resulting in costly waste. Repurposing this waste material through powder metallurgy (PM) offers a cost-effective solution. This stud
Externí odkaz:
https://doaj.org/article/1b2e070de039473cbb50e690c200e395
Autor:
Marcela Silva Lamoglia, Pedro Henrique Gonçalves, Ágata Mayara Paula Pontes, Leandro Bernardes Serrano, Gilbert Silva, Antonio Augusto Araújo Pinto da Silva
Publikováno v:
Materials Research, Vol 25 (2022)
Abstract In this paper, Fe-15at.%Nb alloys were produced from high purity Fe (min. 99.8%) and Nb (min. 99.8%) powders via a mechanical alloying process. The effects of different Process Control Agents (i.e., methanol, hexane, and stearic acid) were i
Externí odkaz:
https://doaj.org/article/58b3f9e51752480c92c38fd9040b0883
Autor:
Thiago Gonçalves de Oliveira, Danilo Valim Fagundes, Patrícia Capellato, Daniela Sachs, Antonio Augusto Araújo Pinto da Silva
Publikováno v:
Metals, Vol 12, Iss 11, p 1940 (2022)
Due to its great amount of microstructure and property possibilities as well as its high thermodynamic stability and superior mechanical performance, the new class of material known as high-entropy alloys (HEAs) has aroused great interest in the rese
Externí odkaz:
https://doaj.org/article/1b4a4a20f1fa4906a42dfa84fd5a8ccb
Autor:
Luciano Braga Alkmin, Antonio Augusto Araújo Pinto da Silva, Carlos Angelo Nunes, Claudinei dos Santos, Gilberto Carvalho Coelho
Publikováno v:
Materials Research, Vol 17, Iss 3, Pp 627-631 (2014)
The focus of this work was to determine microstructural features in commercial Ni-Cr alloys which could be used to identify indirectly the presence of beryllium. Thus, eight commercial alloys were characterized by chemical analysis, thermal analysis,
Externí odkaz:
https://doaj.org/article/85f6a809fc3a463e840bd166f9c92ca9
Autor:
Nícolas Pinheiro Ramos, Sandro Metrevelle Lima e Silva, Mariana De Melo Antunes, Antonio Augusto Araújo Pinto da Silva
Publikováno v:
Journal of Materials Science. 58:1905-1924
Autor:
K. E. Borowski, Gilberto Carvalho Coelho, D.F. Barros, D.A. Abreu, Antonio Augusto Araújo Pinto da Silva, J.C.P. Santos, N. Chaia, Carlos Angelo Nunes
Publikováno v:
Journal of Phase Equilibria and Diffusion. 41:172-180
Phase equilibria in the Al-Nb-V system are important data for the design of innovative Al-containing refractory-high-entropy alloys, however issues still open in this system. In the present work, Al-Nb-V phase equilibria at 1200 °C were re-investiga
Autor:
Antonio Augusto Araújo Pinto da Silva, Carlos Angelo Nunes, Luiz Antonio Borges Junior, Gilberto Carvalho Coelho
Publikováno v:
Journal of Phase Equilibria and Diffusion. 41:123-131
The knowledge of phase equilibria in RM-Si-B systems (RM = Refractory and/or Reactive Metals) is of great interest for the elaboration of thermodynamic databases, aiming the development of high temperature materials. Despite this, no experimental inv
Autor:
Nicolas David, Carlos Angelo Nunes, Michel Vilasi, Antonio Augusto Araújo Pinto da Silva, Gilberto Carvalho Coelho, Belmira Benedita de Lima-Kühn, Jean-Marc Fiorani, Flávio Ferreira, Pauline Vilasi
Publikováno v:
Calphad. 63:107-115
In the present work, the Ta-B system was thermodynamically optimized based on the CALPHAD method using data of liquidus temperatures, invariant transformations and enthalpy of formation from the literature as well as new experiments performed in our
Autor:
Carlos Angelo Nunes, Gilberto Carvalho Coelho, Gilbert Silva, Antonio Augusto Araújo Pinto da Silva, Nicolas David, Jean-Marc Fiorani, Marcela Silva Lamoglia, Michel Vilasi, Luiz T.F. Eleno
Publikováno v:
Journal of Alloys and Compounds. 878:160411
The molar heat capacities of the Fe2Nb and Fe7Nb6 intermetallic compounds are reported here for the first time. The results were obtained via Differential Scanning Calorimetry (DSC) measurements, performed in a temperature range between 348 and 1038