A5032414707- Advanced Surface Polishing Techniques
- Advanced materials and composites
- Advanced ceramic materials synthesis
- Advanced machining processes and optimization
- Laser Material Processing Techniques
- Metal and Thin Film Mechanics
- Advanced Machining and Optimization Techniques
- High-Temperature Coating Behaviors
- Aluminum Alloys Composites Properties
- Diamond and Carbon-based Materials Research
- Dental Implant Techniques and Outcomes
- Academic Research in Diverse Fields
- Material Properties and Applications
- Cultural Heritage Materials Analysis
- Ferroelectric and Piezoelectric Materials
- Metal Alloys Wear and Properties
- Orthodontics and Dentofacial Orthopedics
- Dielectric properties of ceramics
- Microwave Dielectric Ceramics Synthesis
- High Entropy Alloys Studies
- Pigment Synthesis and Properties
- Surface Roughness and Optical Measurements
- Injection Molding Process and Properties
- Material Selection and Properties
- Chemistry Education and Research
Universidade Federal do Espírito Santo
2020-2024
Universidade de São Paulo
2012-2023
Universidade Federal de São Carlos
2023
Instituto de Pesquisas Energéticas e Nucleares
2018
Energy Research Institute
2015
Universidade Federal de Uberlândia
2010-2014
The pulse length for ultrashort lasers is considered shorter than the thermal vibration period of material lattice. diffusion depth negligible when compared with optical penetration because laser-matter interaction occurs only near focal volume. Hence, are indicated micromachining. This study aims to evaluate straight and zig-zag texture patterns generated by laser pulses on rake face uncoated cemented carbide tools during turning martensitic stainless steel. tests were performed under dry...
The spark plasma sintering (SPS) technique, by using a compacting pressure of 50 MPa, was used to consolidate pre-reacted powders Bi1.65Pb0.35Sr2Ca2Cu3O10+δ (Bi-2223). influence the consolidation temperature, TD, on structural and electrical properties has been investigated compared with those reference sample synthesized traditional solid-state reaction method subjected same pressure. From X-ray diffraction patterns, performed in both powder pellet samples, we have found that dominant phase...
Cutting tools with higher wear resistance are those manufactured by powder metallurgy process, which combines the development of materials and design properties, features shape-making technology sintering. The annual global market cutting consumes about US$ 12 billion; therefore, any research to improve tool designs machining process techniques adds value or reduces costs. aim is describe Spark Plasma Sintering (SPS) in functionally gradient materials, show this structure suitability through...
The aim is to analyze the influence of two sintering process parameters concerning compact densification WC-Co. input variables studied were uniaxial pressure (40 and 60 MPa) holding time (1 3 minutes). output monitored relative density, microstructural features, besides online monitoring dynamics sintering. samples sintered in a Dr. Sinter-Syntex machine Spark Plasma Sintering (SPS), which allows heating rate greater than conventional techniques, with advantage lower temperature, energy...
A perovskita CaCu3Ti4O12 foi consolidada pela técnica se sinterização assistida por campo elétrico. Foi investigada a influência do tempo e da temperatura de na estrutura cristalina, microestrutura nas propriedades dielétricas cerâmica policristalina. As amostras foram sinterizadas entre 750 930 °C, tempos 1 8 min. Os pós calcinados 900 °C durante 18 h. pastilhas caracterizadas difração raios X, microscopia eletrônica varredura espectroscopia impedância. O padrão X apresenta tipo o parâmetro...
Advanced structural ceramics have limited applications because of their low fracture toughness. Although many toughening methods been established, they cannot sufficiently ensure the widespread application. Functionally graded material (FGM) is a combination two or more elements in which one element gradually varies relation to other along structure, improving properties. This study aims design an FGM composed groups cutting tool materials, Al2O3-ZrO2 (ceramic-based alumina) and WC-Co...
Polycrystalline CaCu 3 Ti 4 O 12 ceramics were prepared by solid state reactions spark plasma sintering (SPS) technique. In this study, the effects of dwell temperature on structural, microstructural and dielectric properties have been investigated. Powder mixtures calcined at 900°C for 18 h before SPS consolidation. The temperatures 850, 900, 915 930°C. Sintered pellets characterized X-ray diffraction, scanning electron microscopy impedance spectroscopy. diffraction patterns show evidences...