Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Marcelo Falcão de Oliveira"'
Autor:
João Gabriel da Cruz Passos, Bruno Xavier de Freitas, Rodrigo da Silva, Carlos Alberto Della Rovere, Rodrigo Magnabosco, Marcelo Falcão de Oliveira, Artur Mariano de Sousa Malafaia
Publikováno v:
Journal of Materials Research and Technology, Vol 27, Iss , Pp 1281-1292 (2023)
Ferritic layer formation occurs after oxidation in Mn-rich austenitic alloys. It has significant effects on high-temperature oxidation resistance, but a better understanding of its formation is needed to control these effects. Thus, two FeMnSiCrNi al
Externí odkaz:
https://doaj.org/article/29596d3fdfd0485ea2d63de5f2b8e836
Autor:
Nelson Delfino de Campos Neto, Leonardo Pratavieira Deo, Marcio Andreato Batista Mendes, Michael Joseph Kaufman, Marcelo Falcão de Oliveira
Publikováno v:
Materials Research, Vol 25 (2022)
The microstructure of a melt-spun Zr28Ni44Cu28 (at. %) alloy was characterized in order to determine the structures and compositions of the crystalline phases that compete with glass formation during rapid solidification. Two crystalline phases were
Externí odkaz:
https://doaj.org/article/bba4776fb4574c0080ea5e800df03b91
Publikováno v:
Materials Research, Vol 24, Iss 1 (2021)
This study first reports details of a successful arc-melting furnace in the production of bulk metallic glasses (BMGs). Also, the study presents the results of a statistical experiment evaluating critical processing parameters that can increase oxyge
Externí odkaz:
https://doaj.org/article/741c3bbf40e94de6b0f9d7f3b3c67937
Autor:
Felipe Raphael Salgado, Janaina Fracaro de Souza Gonçalves, Marcio Andreato Batista Mendes, Nelson Delfino de Campos Neto, Marcelo Falcão de Oliveira
Publikováno v:
Materials Research, Vol 23, Iss 4 (2020)
Abstract Zr-based bulk metallic glasses (BMGs) are widely used as mechanical components due to their excellent properties and high glass-forming ability. However, there is a lack of research concerning the tribological behavior of BMG versus BMG. The
Externí odkaz:
https://doaj.org/article/c55b2054cd2b47fd80ccd5a1a57c82c0
Autor:
Nelson Delfino de Campos Neto, Wesley Marques de Paula, Flavio Soares Pereira, Catherine Jane Parrish, Marcelo Falcão de Oliveira
Publikováno v:
Materials Research, Vol 21, Iss 6 (2018)
The present work reports investigation on the Glass Forming Ability (GFA) of Zr-based Bulk Metallic Glasses (BMG’s) by microalloying with early transition metals. GFA was measured as the amorphous fraction formed in samples with different diameters
Externí odkaz:
https://doaj.org/article/d3cc4f7f834249ac86d99324a54b6ea3
Autor:
Marcio Andreato Batista Mendes, Claudio Shyinti Kiminami, Walter José Botta Filho, Claudemiro Bolfarini, Marcelo Falcão de Oliveira, Michael Joseph Kaufman
Publikováno v:
Materials Research, Vol 18, Iss suppl 2, Pp 104-108 (2015)
A good glass former, Ti57.4Cu33.4Ni9.2, was selected using the topological instability criterion (lambda criterion) and the average electronegativity approach. The crystallization behavior and microstructural development of amorphous melt-spun ribbon
Externí odkaz:
https://doaj.org/article/6db74e2e40c941249636df9752a71ada
Autor:
Carlos Alberto Caldas de Souza, Claudomiro Bolfarini, Walter José Botta Jr., Luiz Rogério Pinho de Andrade Lima, Marcelo Falcão de Oliveira, Claudio S. Kiminami
Publikováno v:
Materials Research, Vol 16, Iss 6, Pp 1294-1298 (2013)
In the present work the effect of substituting Mo with Nb on the glass forming ability and corrosion resistance of Fe-Co-Cr-M-Si-B-Y (M=Mo, Nb) ribbons with high corrosion resistance is investigated. The X-ray powder diffraction pattern indicates tha
Externí odkaz:
https://doaj.org/article/f5c8b57a7b42450b88386b3f2a8e0045
Autor:
Marcio Andreato Batista Mendes, Luis César Rodríguez Aliaga, Claudio Shyinti Kiminami, Marcelo Falcão de Oliveira, Walter José Botta Filho, Claudemiro Bolfarini
Publikováno v:
Materials Research, Vol 15, Iss 5, Pp 718-722 (2012)
A combination of an extension of the topological instability "λ criterion" and the "average electronegativity" has been recently reported in the literature to predict compositions with high glass-forming ability (GFA). In the present work, both crit
Externí odkaz:
https://doaj.org/article/cf903383924d4f57b11056544e545748
Autor:
Artur Mariano de Sousa Malafaia, Carolina Aurélia Ribeiro Maestro, Marcelo Falcão de Oliveira
Publikováno v:
International Journal of Metalcasting. 16:1265-1275
Iron aluminides based on Fe3Al intermetallic structure are known by their good corrosion and oxidation resistance. However, the hydrogen embrittlement is an issue generated by passive Al2O3 formation due to Al reaction with atmospheric water vapor. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::728066ac33c8113eef03b1d52616361a
https://doi.org/10.1007/s40962-021-00679-4
https://doi.org/10.1007/s40962-021-00679-4
Publikováno v:
International Journal of Metalcasting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3f511461143760d85cd5939499eebffc
https://doi.org/10.1007/s40962-022-00881-y
https://doi.org/10.1007/s40962-022-00881-y