Revestimento cerâmico aplicado como barreira térmica em componentes automotivos
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Dissertação
Date
2018-06-07
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Authors
Moraes, Denison Angelotti
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Munhoz Junior, Antônio Hortêncio
Journal Title
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Miranda, Leila Figueiredo de
Valenzuela Diaz, Francisco Rolando
Valenzuela Diaz, Francisco Rolando
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Engenharia de Materiais
Abstract
Automotive components are always in development, aiming to improve performance and
quality, either by reducing costs, market need, increased sales and productivity or some new
environmental or safety legislation. In the last years the environmental theme has gained interest
and has become central to vehicles that use fossil fuels, especially Diesel oil, and must comply
with new emission laws. For this, new engines and exhaust systems and gas filtration have been
developed, such as catalytic converters. The upcoming legislation, called PROCONVE P8,
restricts the values of nitrous oxides (NOx) and particulate matter to very low values. In order
to achieve these values, the post-treatment system called the ATS (After Treatment System)
was developed. In order for the process to reduce pollutants to be made within the ATS, the
exhaust gases burned in the combustion process inside the engine must be between 450 and 550
ºC. The burned gases, or exhaust gases, are piped to the catalyst by metal tubing. In this work
was proposed the use of 8% by weight (ZrO2-Y2O3) stabilized Zirconia oxide ceramic, known
as YSZ (Ytria Stabilized Zirconia), or 8YSZ, known as TBC (Thermal Barrier Coating). The
TBC was studied as a coating of exhaust pipe, through analytical calculation and CFD
(Computer Fluid Dynamics). The results showed that the YSZ is a potential material for the
studied application, as well as for applications where the thermal barrier theme is relevant.
Description
Keywords
componentes automotivos , legislações de emissão , sistema de póstratamento , gases de exaustão , ZrO2-Y2O3 , barreira térmica
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Citation
MORAES, Denison Angelotti. Revestimento cerâmico aplicado como barreira térmica em componentes automotivos. 2018. 93 p. Dissertação( Engenharia de Materiais) - Universidade Presbiteriana Mackenzie, São Paulo.