Thick Film Laser Sintering: An Evidence for Two-step Process

Antonelli, Eduardo; Andreeta, Marcello Rubens Barsi; Botero, Ériton Rodrigo; Hernandes, Antônio Carlos

doi:10.2174/1874846501306010001

TOCRYJ

2013

DOI: 10.2174/1874846501306010001

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Thick Film Laser Sintering: An Evidence for Two-step Process

Eduardo Antonelli¹,

Marcello Rubens Barsi Andreeta²,

Ériton Rodrigo Botero³

et al.

Abstract: Abstract:The results for the sintering of Bi 4 Ti 3 O 12 (BIT)-doped BaTi 0.85 Zr 0.15 O 3 (BTZ) thick films, deposited by electrophoresis, using as heating source a CO 2 laser are presented. The thermal process associated to the laser scanning sintering (LSS) acted in a similar way as a two-step-sintering process. This characteristic together with the high heating rate allowed us to obtain thick films with an average grain size of 200 nm, high relative density (~96%) and with a homogeneous microstructure. The… Show more

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2023

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References 18 publications

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A Direct Laser Sintering Approach for the Electrophoretic Deposition Overlay of Yttria-Stabilized Zirconia on the Surface of a Thermal Barrier Coating System

Ali Bash,

Ajeel,

Abbas

et al. 2023

Coatings

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The laser sintering process and modification of yttria-stabilized zirconia (YSZ) coatings subjected to electrophoretic deposition (EPD) on YSZ air-plasma-sprayed (APS) thermal barrier coatings (TBCs) were investigated. A Ni-based superalloy was plasma-sprayed using yttria-stabilized zirconia (YSZ) to create a thermal barrier coating with a 400 μm thickness. The electrophoretic deposition (EPD) technique was used to deposit the nanopowder of YSZ on the surface of YSZ TBCs. In this study, a technology based on the direct sintering of a green EPD layer using a laser beam was employed. The best conditions for the deposition overlay of the YSZ coating using a DC current were obtained with an applied voltage of 40 V, deposition time of 5 min, and suspension concentration of 10 g/L. Iodine was added to the solutions as a stabilizing agent. To overcome the problems of high sintering temperatures, laser sintering was adopted as a new approach. The microstructures of all the specimens were studied using field emission scanning electron microscopy (FESEM) with energy-dispersive X-ray spectroscopy (EDS) analysis. Surface roughness was investigated using atomic force microscopy (AFM) analysis and the central line average (CLA). The direct laser sintering (DLS) process for the EPD overlay on the surface of the TBCs caused a reduction in surface roughness and porosity, and improvements in the microstructural and mechanical properties of the surface coatings were observed.

show abstract

A Direct Laser Sintering Approach for the Electrophoretic Deposition Overlay of Yttria-Stabilized Zirconia on the Surface of a Thermal Barrier Coating System

Ali Bash,

Ajeel,

Abbas

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

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Thick Film Laser Sintering: An Evidence for Two-step Process

Cited by 1 publication

References 18 publications

A Direct Laser Sintering Approach for the Electrophoretic Deposition Overlay of Yttria-Stabilized Zirconia on the Surface of a Thermal Barrier Coating System

A Direct Laser Sintering Approach for the Electrophoretic Deposition Overlay of Yttria-Stabilized Zirconia on the Surface of a Thermal Barrier Coating System

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