Banca de DEFESA: ANA CAROLINA MARÇAL PIRES FERREIRA LUCAS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ANA CAROLINA MARÇAL PIRES FERREIRA LUCAS
DATE: 21/04/2022
TIME: 13:00
LOCAL: SalaVirtual
TITLE:

STUDY OF THE EFFECT OF THE ADDITION OF TITANIUM CARBIDE ON THE MICROSTRUCTURAL AND MECHANICAL PROPERTIES OF WC-FE CARBIDE

KEY WORDS:

 

Keywords: WC-Fe-TiC composites; High Energy Milling (HEM); Sintering, Powder Metallurgy. 

 

PAGES: 90
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Metalurgia de Transformação
SPECIALTY: Metalurgia de Pó
SUMMARY:

The present work aimed to study the effect of adding 1.5%, 3.0% and 4.5%, by mass, of TiC, to a WC-10%Fe composite powder, prepared by high energy milling. The composite powders were processed in a humid environment, using 99% ethyl alcohol, in a high energy planetary mill, with a container and carbide balls, under agitation of 400 rpm, with a ball/powder ratio of 5:1 during 10 hours. Subsequently, the ground powders were compacted at 200 MPa, in a uniaxial 8 mm stainless steel cylindrical matrix, and sintered in a resistive furnace at 1300 °C, 1400 °C, 1500 °C and 1600 °C for 1 h, under of argon and with a heating rate of 10 °C/min. To evaluate the composition, microstructure and properties, materials characterization techniques were used, such as Vibrating Sample Magnetometer (VSM), Granulometry, Scanning Electron Microscopy (SEM), X-Ray Diffractometry (XRD). In the consolidated samples, microstructural analysis was performed, microhardness measurement and density measurement by the Archimedes method. The results showed that high energy milling is an efficient method for homogenization and particle size reduction and the addition of TiC to WC-Fe contributes significantly, reflecting in samples with improved properties. 

 

 

BANKING MEMBERS:
Presidente - 345842 - UILAME UMBELINO GOMES
Externa à Instituição - ARIADNE DE SOUZA SILVA
Externa à Instituição - MARIA JOSÉ SANTOS LIMA
Externo à Instituição - NAILTON TORRES CAMARA
Externo à Instituição - RAFAEL ALEXANDRE RAIMUNDO