Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Rômulo Ribeiro Magalhães de Sousa"'
Autor:
Hunos Paixão Madureira, Renan Matos Monção, Adriano Almeida Silva, Angel Alberto Hidalgo, Maria Letícia Vega, Michelle Cequeira Feitor, Francisco Eroni Paz Santos, Thércio Henrique de Carvalho Costa, Rômulo Ribeiro Magalhães de Sousa
Publikováno v:
Materials Research, Vol 26 (2023)
We investigate the structural, optical, thermal-optical, and electronic properties of TiNx thin films utilizing a variety of experimental techniques, including spectroscopic ellipsometry, Raman spectroscopy, scanning electron microscopy, atomic force
Externí odkaz:
https://doaj.org/article/bb04ff4ba04f47d7b03908544a7e270f
Autor:
Anderson Wagner Alves de Menezes, Ivan Alves de Souza, Thércio Henrique de Carvalho Costa, Tharsia Cristiany de Carvalho Costa, Rômulo Ribeiro Magalhães de Sousa, Rubens Maribondo Nascimento, Michelle de Medeiros Aires, Michelle Cequeira Feitor
Publikováno v:
Journal of Materials Research and Technology, Vol 18, Iss , Pp 1578-1589 (2022)
The tissue–prosthesis relationship is essential for the success of an implant. Aiming at higher levels of affinity between the implant and the human body, engineering focuses on studies on ceramic coating processes, surface modifications, and the s
Externí odkaz:
https://doaj.org/article/e503d864300045a0af5d32f61beb77cf
Autor:
Heurison de Sousa e Silva, Fernanda Roberta Marciano, Alan Silva de Menezes, Thercio Henrique de Carvalho Costa, Larissa Solano de Almeida, Luciana Sgarbi Rossino, Igor Oliveira Nascimento, Rômulo Ribeiro Magalhães de Sousa, Bartolomeu Cruz Viana
Publikováno v:
Journal of Materials Research and Technology, Vol 9, Iss 6, Pp 13945-13955 (2020)
TiN granular thin films were deposited on SiO2 substrates using cathodic cage plasma nitriding (CCPN) and SEM images, roughness analysis, contact angle measurements, and X-ray diffraction (XRD) were employed to characterize the structure of these fil
Externí odkaz:
https://doaj.org/article/a5461745e8a5468d86b9ba897eee3a91
Autor:
Renan Matos Monção, Miguel Rubira Danelon, Larissa Solano de Almeida, Luciana Sgarbi Rossino, Fernanda Roberta Marciano, Thércio Henrique de Carvalho Costa, Michelle Cequeira Feitor, Ruben Maribondo do Nascimento, Rômulo Ribeiro Magalhães de Sousa
Publikováno v:
Materials Research, Vol 25 (2022)
Molybdenum trioxide (MoO3) thin films are generally deposit on metallic surfaces to increase their tribological performance. In this manuscript, MoOx coatings were for the first time deposited on plasma nitrided surfaces. Vickers microhardness tests,
Externí odkaz:
https://doaj.org/article/33311199f31446f3859f46595ae8d084
Autor:
Ferdinando Marco Rodrigues Borges, Wênio Fhará Alencar Borges, Rafaela Luiz Pereira Santos, Valdemar Silva Leal, José Ribeiro dos Santos Júnior, Anderson Oliveira Lobo, Rômulo Ribeiro Magalhães de Sousa
Publikováno v:
Materials Research, Vol 24, Iss 6 (2021)
Super duplex stainless steel (SDSS) combines corrosion resistance and mechanical properties, interesting to applications in the oil extraction industry. In this process, wear between the tools friction and rocky materials occurs with SDSS pipes. Due
Externí odkaz:
https://doaj.org/article/582b522719104d72a87d7091bfee9293
Autor:
Pablo Matheus Oliveira Costa, Petteson Linniker Carvalho Serra, Renan Matos Monção, Alan Silva de Menezes, Ferdinando Marco Rodrigues Borges, Thercio Henrique de Carvalho Costa, Rômulo Ribeiro Magalhães de Sousa
Publikováno v:
Materials Research, Vol 24, Iss 1 (2021)
Abstract AISI D6 tool steel and AISI 304 stainless steel are among the most widely used material in the industry. However, this application field can still be expanded through the coatings deposition. In this regard, the objective of this work was to
Externí odkaz:
https://doaj.org/article/ed4ecf9579164d94a5eab20b28aad146
Autor:
Isaías Damasceno da Conceição, Lucas Rafael Carneiro da Silva, Tatianny Soares Alves, Heurison de Sousa e Silva, Renata Barbosa, Rômulo Ribeiro Magalhães de Sousa
Publikováno v:
Materials Research, Vol 22, Iss suppl 1 (2019)
Polyethylene (PE) is a polymer that has a low adhesion property, which is related to its low surface energy. However, the plasma treatment aims the modification of the surface properties without affecting the polymer structure. In this sense, the obj
Externí odkaz:
https://doaj.org/article/1ab432f2372747169b2680be697228d2
Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique
Autor:
Rômulo Ribeiro Magalhães de Sousa, Francisco Odolberto de Araújo, José Alzamir Pereira da Costa, Akio Nishimoto, Bartolomeu Cruz Viana, Clodomiro Alves Jr.
Publikováno v:
Materials Research, Vol 19, Iss 5, Pp 1207-1212 (2016)
This research used the "cathodic cage (CC)" technique for TiO2 film deposition on duplex stainless steel substrate. This technique uses a multiple hollow cathode effect. Duplex stainless steel substrates were treated at temperatures of 300°C, 350°C
Externí odkaz:
https://doaj.org/article/26a11f88d6ae48c992630052ad39b1c5
Autor:
Michelle Cequeira Feitor, Clodomiro Alves Junior, Clovis Medeiros Bezerra, Rômulo Ribeiro Magalhães de Sousa, Thercio Henrique de Carvalho Costa
Publikováno v:
Materials Research, Vol 18, Iss 5, Pp 891-896 (2015)
AbstractPolyester fabric samples – PET (poly (ethylene terephtalate)), were treated with oxygen plasma, in order to alter the hydrophilicity of such material. The process parameters: working pressure, current, tension and temperature were kept cons
Externí odkaz:
https://doaj.org/article/8e49b128ea6241db9dcc8288c7eaaad8
Autor:
Rômulo Ribeiro Magalhães de Sousa, Francisco Odolberto de Araújo, Thercio Henrique de Carvalho Costa, Igor Oliveira Nascimento, Francisco Eroni Paes Santos, Clodomiro Alves Júnior, Michelle Cequeira Feitor
Publikováno v:
Materials Research, Vol 18, Iss 2, Pp 347-352 (2015)
Thin nitride and titanium dioxide films were produced using an innovative technique called cathodic cage depositon. Uniformity, three-dimensionality and high rate deposition are some of the advantages of this technique. In this study we discuss the i
Externí odkaz:
https://doaj.org/article/d880c050eb8445f3824823907bdfb44b