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Advanced characterization through TEM of FIB prepared samples of nanocrystalline alloy coatings produced by thermal spray and laser cladding

Grant number: 15/19978-6
Support type:Scholarships abroad - Research
Effective date (Start): March 01, 2016
Effective date (End): December 31, 2016
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Conrado Ramos Moreira Afonso
Grantee:Conrado Ramos Moreira Afonso
Host: Vicente Amigo Borras
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Local de pesquisa : Universitat Politécnica de Valéncia (UPV), Spain  
Associated research grant:13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys, AP.TEM


The surface treatments through laser that result in phase transformations solid state and the production of coatings for advanced applications in order to improve wear and corrosion resistance, are characterized as one of the main materials processing alternatives that brings together the possibility of obtaining, refined microstructures, metastable, nano and quasicrystalline and amorphous structure, with significant improvements in properties of metallic alloys when compared with commercial alloys or crystalline slowly solidified though conventional metallurgical processing routes. The objective of this project is the sample preparation for transmission electron microscopy (TEM) through focused ion beam (FIB) of Nanocrystalline Alloys Coatings produced by Thermal Spray and Laser Cladding from atomized powders. It will be studied the micro and nanostructure of coatings (and its interface with substrate) of Fe-, Ni-Nb, Cu-Zr, Al- and Ti-based Nanocrystalline Alloys atomized powders, using Thermal Spray and Laser Cladding, and it respective microstructure characterization. The characterization techniques used in this work will be X-ray diffraction (XRD), thermal analysis (DSC), scanning (SEM) and transmission electron microscopy (TEM) coupled to energy dispersive spectroscopy (EDS). Nanohardness measurements will be used for evaluation of nanohardness and Young modulus (GPa) of the coatings and interface with substrate. The execution of this proposal will be associated to a "Thematic" Project of FAPESP (Nº: 2013/05987-8) in our research group Lab (Amorphous and Nanocrystalline Alloys) the possibility de establish a new research area at the DEMa/UFSCar regarding materials processing through Laser.

Scientific publications (6)
(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)
DE SALVO, JOAO G. J.; AFONSO, CONRADO R. M. Fatigue strength and microstructure evaluation of Al 7050 alloy wires recycled by spray forming, extrusion and rotary swaging. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA, v. 30, n. 12, p. 3195-3209, DEC 2020. Web of Science Citations: 0.
CANEDA, CHAIANE M.; FOGAGNOLO, JOAO B.; KIMINAMI, CLAUDIO S.; AFONSO, CONRADO R. M. Ultrafine eutectic coatings from Fe-Nb-B powder using laser cladding. MATERIALS CHARACTERIZATION, v. 160, FEB 2020. Web of Science Citations: 0.
GONZALEZ, E. DAVID; AFONSO, CONRADO R. M.; NASCENTE, PEDRO A. P. Nanostructural characterization of sputter deposited Ti-Nb coatings byautomated crystallographic orientation mapping. Thin Solid Films, v. 661, p. 92-97, SEP 1 2018. Web of Science Citations: 0.
MARTINEZ OROZCO, KATHERINE; DESSI, JOAO GUILHERME; MOREIRA AFONSO, CONRADO RAMOS; MEZA MEZA, JUAN; UNFRIED-SILGADO, JIMY. Experimental study and thermodynamic computational simulation of phase transformations in centrifugal casting bimetallic pipe of API 5L X65Q steel and Inconel 625 alloy. JOURNAL OF MANUFACTURING PROCESSES, v. 32, p. 318-326, APR 2018. Web of Science Citations: 1.
AFONSO, C. R. M.; VIDILLI, A. L.; SPINELLI, J. E.; RIVA, R.; AMIGO, V.; KIMINAMI, C. S. An assessment of microstructure and properties of laser clad coatings of ultrafine eutectic beta Ti-Fe-Nb-Sn composite for implants. SURFACE & COATINGS TECHNOLOGY, v. 328, p. 161-171, NOV 15 2017. Web of Science Citations: 2.
AFONSO, CONRADO R. M.; AMIGO, ANGELICA; STOLYAROV, VLADIMIR; GUNDEROV, DMITRI; AMIGO, VICENTE. From Porous to Dense Nanostructured beta-Ti alloys through High-Pressure Torsion. SCIENTIFIC REPORTS, v. 7, OCT 19 2017. Web of Science Citations: 7.

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