Banca de DEFESA: IGOR MARTINS COURA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : IGOR MARTINS COURA
DATE: 22/12/2021
TIME: 10:00
LOCAL: Banca examinadora com participação remota
TITLE:

EVALUATION OF THE PROPERTIES OF THE SAE 323 CAST ALUMINUM ALLOY WITH ADDITION OF GRAPHENE PROCESSED IN AN INERT ATMOSPHERE

KEY WORDS:

Graphene, aluminum, nanocomposites, casting, inert atmosphere. 

PAGES: 96
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Metalurgia Física
SPECIALTY: Propriedades Físicas dos Metais e Ligas
SUMMARY:

Literature has recently shown that aluminum (Al) matrix nanocomposites with graphene (G) reinforcement have attracted attention mainly due to their high physical properties/density ratio. Al and its alloys, in turn, are commonly used industrially in the electrical, automotive and aerospace sectors in various applications that require materials with high mechanical resistance, good conductivity, low density and a significant cost-effective comparative advantage. Graphene, an allotropic carbon, has a very low density, low coefficient of thermal expansion, in addition to reasonable mechanical and electrical properties. In this work, it was sought to improve the melt processing in an inert atmosphere to evaluate the properties of nanocomposites with an SAE 323 aluminum alloy matrix with graphene reinforcement. The graphene material used had up to 30 layers, being added in proportions of 0.5%, 1% and 2% m/m. To obtain the specimens (CPs) by melting in a resistive furnace, adaptations to avoid oxidation were carried out using a nitrogen (N₂) gas atmosphere. The tests of physical-chemical and microstructural characterizations of the PCs were performed by scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS) used to determine the percentage of carbon, to determine the incorporation and dispersion of fractions of graphene and evaluate the morphologies. The mechanical, electrical and thermal tests performed were: hardness (HB and HV) to evaluate the mechanical properties; electrical conductivity test to evaluate the electrical properties (conductance) and thermal conductivity test, using the quadruple thermal method (laser flash) to evaluate the thermal properties (thermal conduction). It was found that in the nanocomposite that the reinforcement material was dispersed and found both in the matrix and in clusters, and the mechanical properties did not show changes, whereas the electrical and thermal properties were slightly modified.

BANKING MEMBERS:
Presidente - SIDNEY NICODEMOS DA SILVA
Interna - IVETE PEIXOTO PINHEIRO SILVA - CEFET-MG
Externo ao Programa - ALMIR GONCALVES VIEIRA