Banca de QUALIFICAÇÃO: WILLIAM DE PAULA SANTOS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : WILLIAM DE PAULA SANTOS
DATE: 10/11/2023
TIME: 09:00
LOCAL: Campus Santo André
TITLE:

PRODUCTION AND CHARACTERIZATION OF Ti COMPOSITES REINFORCED WITH NbC BY NON-CONVENTIONAL TECHNIQUES OF MANUFACTURING

PAGES: 132
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

Production of composite materials using non-conventional methods, such as severe plastic deformation (SPD) and spark plasma sintering, has attracting much attention of scientists over the last years. In this study, equal channel angular pressing (ECAP), which is the more developed technique of severe plastic deformation, is investigated to manufacture high resistance materials with potential for structural and biomedical applications. Composite samples were also manufactured by SPS, allowing comparing the effectiveness of both techniques (ECAP and SPS) to produce densely consolidated composite parts. Therefore, it is possible to evaluate ECAP processing as an alternative for sintering techniques such as SPS, generally employed to produce metal matrix composites. Ti composites reinforced with NbC produced by ECAP and SPS were investigated. The effects of processing parameters on the densification, mechanical and tribological properties were investigated. The microstructure of the samples was analyzed by confocal scanning laser microscopy, scanning electron microscopy and X-ray diffraction. Mechanical and tribological properties were assessed by microhardness, nanoindentation and wear tests. The microhardness of SPS produced samples were higher than those of ECAP processed samples. In the case of SPS, different powder pre-processing conditions were also tested. The values of elastic modulus for the ECAP processed composites were close of the desirable values for biomedical implants.

COMMITTEE MEMBERS:
Presidente - Interno ao Programa - 1282172 - ROBERTO GOMES DE AGUIAR VEIGA
Membro Titular - Examinador(a) Externo ao Programa - 1893637 - ALEJANDRO ANDRES ZUNIGA PAEZ
Membro Titular - Examinador(a) Externo ao Programa - 2133170 - ERIKA FERNANDA PRADOS
Membro Titular - Examinador(a) Externo à Instituição - KÁTIA REGINA CARDOSO - UNIFESP
Membro Suplente - Examinador(a) Interno ao Programa - 1761120 - DANILO JUSTINO CARASTAN
Membro Suplente - Examinador(a) Externo ao Programa - 1646041 - CARLOS TRIVENO RIOS
Membro Suplente - Examinador(a) Externo ao Programa - 3068039 - MOHAMMAD MASOUMI
Membro Suplente - Examinador(a) Externo à Instituição - SILVANO LEAL DOS SANTOS