Solid Particle Erosion of a Plasma Spray – Physical Vapor Deposition Environmental Barrier Coating in a Combustion Environment

2021 ◽  
Author(s):  
Michael J. Presby ◽  
Bryan J. Harder
Keyword(s):  
Solid Particle ◽  
Plasma Spray ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Environmental Barrier ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
Combustion Environment

scholarly journals Water Vapor Corrosion Behavior of Yb2SiO5 Environmental Barrier Coatings Prepared by Plasma Spray-Physical Vapor Deposition

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 392 ◽  
Author(s):  
Chao Wang ◽  
Min Liu ◽  
Junli Feng ◽  
Xiaofeng Zhang ◽  
Chunming Deng ◽  
...  
Keyword(s):  
Water Vapor ◽  
Porous Structure ◽  
Plasma Spray ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Ceramic Matrix Composite ◽  
Environmental Barrier Coatings ◽  
Environmental Barrier ◽  
Barrier Coating ◽  
Water Vapor Corrosion

Tri-layer Si/mullite/Yb2SiO5 environmental barrier coating (EBC) was prepared on the SiCf/SiC ceramic matrix composite (CMC) by plasma spray-physical vapor deposition (PS-PVD). The EBC samples were carried out with water vapor corrosion at 1300 °C for 200 h. After steam corrosion, Yb2SiO5 layer forms a gradient porous structure. This is mainly due to the inclusion of SiO2-rich layer which is precipitated from the gasification inside the coating and existing a small amount of Yb2O3 separately. During the corrosion process, water vapor infiltrates into the coating and reacts with the SiO2 and Yb2O3 to generate volatile substances. This forms a porous structure to make the coating brittle, resulting in mud cracks finally. In addition, the results show that the Yb2SiO5 can react with the water vapor at the coating surface, forming an Yb2Si2O7 top layer.

scholarly journals Rear Earth Oxide Multilayer Deposited by Plasma Spray-Physical Vapor Deposition for Envisaged Application as Thermal/Environmental Barrier Coating

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 889
Author(s):  
Jie Zhong ◽  
Dongling Yang ◽  
Shuangquan Guo ◽  
Xiaofeng Zhang ◽  
Xinghua Liang ◽  
...  
Keyword(s):  
Composite Coating ◽  
High Temperatures ◽  
Physical Vapor Deposition ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Environmental Barrier ◽  
Chemical Attack ◽  
Environmental Barrier Coating ◽  
Barrier Coating

SiC fiber-reinforced SiC ceramic matrix composites (SiCf/SiC CMCs) are being increasingly used in the hot sections of gas turbines because of their light weight and mechanical properties at high temperatures. The objective of this investigation was the development of a thermal/environmental barrier coating (T/EBC) composite coating system consisting of an environmental barrier coating (EBC) to protect the ceramic matrix composites from chemical attack and a thermal barrier coating (TBC) that insulates and reduces the ceramic matrix composites substrate temperature for increased lifetime. In this paper, a plasma spray-physical vapor deposition (PS-PVD) method was used to prepare multilayer Si–HfO2/Yb2Si2O7/Yb2SiO5/Gd2Zr2O7 composite coatings on the surface of SiCf/SiC ceramic matrix composites. The purpose of this study is to develop a coating with resistance to high temperatures and chemical attack. Different process parameters are adopted, and their influence on the microstructure characteristics of the coating is discussed. The water quenching thermal cycle of the coating at high temperatures was tested. The results show that the structure of the thermal/environmental barrier composite coating changes after water quenching because point defects and dislocations appear in the Gd2Zr2O7 and Yb2SiO5 coatings. A phase transition was found to occur in the Yb2SiO5 and Yb2Si2O7 coatings. The failure mechanism of the T/EBC composite coating is mainly spalling when the top layer penetrates cracks and cracking occurs in the interface of the Si–HfO2/Yb2Si2O7 coating.

scholarly journals Preparation of Si/Mullite/Yb2SiO5 Environment Barrier Coating (EBC) by Plasma Spray-Physical Vapor Deposition (PS-PVD)

2018 ◽  
Vol 33 (3) ◽  
pp. 325 ◽  
Author(s):  
ZHANG Xiao-Feng ◽  
ZHOU Ke-Song ◽  
LIU Min ◽  
DENG Chun-Ming ◽  
NIU Shao-Peng ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Barrier Coating

scholarly journals Deposição de recobrimentos de proteção térmica e ambiental por plasma spray utilizando precursor híbrido de SiO2+ZrO2/ Plasma spray deposition of thermal and environmental protection coatings using SiO2+ZrO2 hybrid precursor

2021 ◽  
Vol 5 (4) ◽  
pp. 1755-1766
Author(s):  
Felipe de Souza Miranda ◽  
Eduardo Sant'Ana Petraconi Prado ◽  
Cristian Cley Paterniani Rita ◽  
Roberson José da Silva ◽  
Mauricio Ribeiro Baldan ◽  
...  
Keyword(s):  
Environmental Protection ◽  
Plasma Spray ◽  
High Velocity ◽  
Spray Deposition ◽  
Environmental Barrier ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
Hybrid Precursor

Compósitos reforçados com fibra de carbono (C/C) são materiais amplamente utilizados em componentes estruturais, especialmente quando expostos as intensas cargas aerotermodinâmicas. Sua alta resistência e excepcional tenacidade à fratura, combinados com suas propriedades refratárias, resistência à erosão, corrosão e desgaste tornam este material ideal para aplicações em componentes estruturais, submetidos a altas temperaturas, tais como turbinas e veículos de reentrada atmosférica. Quando utilizados em atmosferas inertes ou em vácuo, os compósitos C/C mantêm suas propriedades a temperaturas superiores a 2000°C. Porém, nas condições de ambientes oxidantes e de elevadas temperaturas, os compósitos a base de fibras de carbono sofrem intensa degradação devido à elevada catalicidade de reações entre o carbono e o oxigênio, dificultando e, muitas vezes, impossibilitando seu uso em dispositivos aeroespaciais. Neste contexto, o objetivo deste trabalho é a deposição de recobrimentos de barreira ambiental (Environmental Barrier Coating, EBC), utilizando precursores híbridos de ZrO2+SiO2 visando proteção contra oxidação dos compósitos estruturais de C/C. Os recobrimentos serão depositados por meio do processo de spray a plasma de alta velocidade (High Velocity Plasma Spray, HVPS).

Sign in / Sign up

Export Citation Format

Share Document