Development, characterization and qualification of carbon materials synthesized by CVD and PECVD techniques

• Grant number: 13/05269-8
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: May 01, 2013
• End date: May 31, 2016
• Field of knowledge: Engineering - Biomedical Engineering
• Agreement: CNPq - Pronex
• Principal Investigator: Homero Santiago Maciel
• Grantee: Everton Diniz dos Santos
• Host Institution: Instituto de Pesquisa e Desenvolvimento (IP&D). Universidade do Vale do Paraíba (UNIVAP). São José dos Campos , SP, Brazil
• Associated research grant: 11/50773-0 - Center of excellence in physics and applications of plasmas, AP.TEM

Abstract

The PRONEX proposal contemplates the research in plasma physics and technology looking to foment R & D activities that include the composition of the teams and the nature of the work, the groups that make up the Center of Excellence in Physics of Plasmas and Applications. This proposal is justified and timely shown in the context of "The 2012 Plasma Roadmap", adapting to the goals of the research lines of this Center of Excellence which focuses on the processing of materials, in specifically in the synthesis of carbon-based materials. The fellow selected displays potential skills and motivation necessary for the implementation of the work plan which provides the production of hydrogenated amorphous diamond films (a-CH) using PECVD technique, as well as the production of diamond films using CVD technique. These carbonaceous materials are fairly investigated and its applications are still growing in the various fields of the productive sector. The doping and incorporation of nanoparticles in these materials enhances their properties and extend the range of its applications. In the case of this work, each produced material, after properly characterized, will have its applicability tested and qualified for specific purposes. Thus, the hydrogenated amorphous diamond or hydrogenated DLC (Diamond Like Carbon), will be evaluated for their applicability to biomedicine, while the diamond film coating will be tested as resistant to plasma irradiation in Tokamak fusion reactors or irradiation by a thermal plasma torch. The nanotecplasma group, which welcomes Everton Diniz student, has the laboratory infrastructure for advanced research in materials processing and has the support of other groups, such as the ITA and USP, which are part of this Center of Excellence. With regard to specific applications, it will be studied both diamond resistant coatings in plasma radiation of Tokamak reactor, as the a-CH film for use in orthopedic prosthesis. It will investigated the factors that favor the increase of the lifetime of coatings, such as the addition of dielectrics and metals as dopants, trying to understand in detail the mechanisms related to the physicochemical interaction in the region of contact with the environment in which the coating is exposed. In the case of diamond, the wear rate of the film will be checked by exposing material samples to irradiation of the plasma from fusion reactor of the Tokamak type, located at Institute of Physics of the São Paulo University. Similarly, the material is exposed to radiation of a thermal plasma torch (water vapor torch, ITA) which emits UV radiation of high intensity. The purpose here is to qualify the resistance of diamond coatings in an environment of high intensity UV. In the case of coatings of a-CH, these include biomedical application, and will be submitted to analysis of tribocorrosion in order to study the degradation in environments that simulate corrosive and biological medium. The results of these analyzes are correlated with morphological and chemical analyzes of the materials produced. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

EVERTON DINIZ DOS SANTOS; GERSON LUQUETA; RAMU RAJASEKARAN; THAISA BAESSO DOS SANTOS; ANELISE CRISTINA OSORIO CESAR DORIA; POLYANA ALVES RADI; RODRIGO SAVIO PESSOA; LUCIA VIEIRA; HOMERO SANTIAGO MACIEL. Macrophages adhesion rate on Ti-6Al-4V substrates: polishing and DLC coating effects. Res. Biomed. Eng., v. 32, n. 2, p. 144-152, 2016-06-00. (11/50773-0, 13/05269-8)

SANTOS, EVERTON D.; LUQUETA, GERSON R.; ABDALA, JULIA M. A.; RAMU, RAJASEKARAN; ESPOSITO, ELISA; REZENDE, LEANDRO B.; VIEIRA, LUCIA; MILTON, JR., B.. Antimicrobial silver coating using PVD-PECVD system. INDIAN JOURNAL OF FIBRE & TEXTILE RESEARCH, v. 45, n. 2, p. 197-206, JUN 2020. (11/50773-0, 13/05269-8)