TBC Development on Ti-6Al-4V for Aerospace Application
Source abstract
Abstract
The Ti-6Al-4V alloy is widely utilized in the aerospace industry for applications such as turbine blades, where it is valued for its mechanical strength at high temperatures, low specific gravity, and resistance to corrosion and oxidation. This alloy provides crucial protection against oxidation and thermal damage. A thermal barrier coating (TBC) typically consists of a metallic substrate, a bond coating (BC), a thermally grown oxide (TGO), and a topcoat ceramic (TC). This study aimed to investigate laser parameters for forming a TBC with a NiCrAlY bond coating and a zirconia ceramic topcoat, which contains 16.0% equimolar yttria and niobia. The coatings were initially deposited in powder form and then irradiated using a CO2 laser. The parameters of laser power and beam scanning speed were evaluated using scanning electron microscopy and X-ray diffraction. The results indicated that the optimal laser scanning speed and power for achieving the best metallurgical bonding between the substrate/BC and the BC-TGO/TC layers were 70 mm/s at 100 W and 550 mm/s at 70 W, respectively. Laser-based layer formation has proven to be a promising technique for the application of TBC.
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Research context
OpenAlex topics: High-Temperature Coating Behaviors · Nuclear Materials and Properties · Advanced ceramic materials synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Laboratory of Mechanical Behavior of Metals, Science and Technology Institute, Federal University of São Paulo, São José dos Campos 12231-280, SP, Brazil
Institute of Aeronautics and Space, São José dos Campos 12231-280, SP, Brazil
ProLaser Laboratory, Science and Technology Institute, Federal University of São Paulo, São José dos Campos 12231-280, SP, Brazil
Funding
FAPESP · FINEP · Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brazil (CAPES) · National Council for Scientific and Technological Development—CNPq
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