Deformation measurement and In-situ observation of damage evolution behavior in environmental barrier coating system at high temperature

2016 ◽  
Vol 2016.24 (0) ◽  
pp. 426
Author(s):  
Ryo INOUE ◽  
Hideki KAKISAWA ◽  
Yasuo KOGO
Keyword(s):  
High Temperature ◽  
Damage Evolution ◽  
Deformation Measurement ◽  
In Situ Observation ◽  
Coating System ◽  
Environmental Barrier ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
Evolution Behavior

scholarly journals Water vapor and CMAS corrosion tests of Si/Y2SiO5 Thermal and Environmental Barrier Coating

2021 ◽  
Author(s):  
Qi Zhang ◽  
Xueqin Zhang ◽  
Zhuang Ma ◽  
Ling Liu ◽  
Yanbo Liu ◽  
...  
Keyword(s):  
Water Vapor ◽  
High Temperature ◽  
Corrosion Test ◽  
Environmental Barrier ◽  
Alkali Salt ◽  
High Temperature Water ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
High Temperature Steam ◽  
Temperature Water

Abstract Thermal and environmental barrier coating (TEBC), the up-to-date concept, is introduced to protect silicon-based ceramics matrix composites (CMC) from not only high temperature water vapor but also the alkali salt from volcanic ash and dust suspending in atmosphere. Because both of high temperature steam and CMAS will make Si-based CMC deteriorate rapidly. By executing the corrosion test against high temperature water vapor, we find that Si/Y2SiO5 double-layer TEBC can effectively protect SiCf/SiC CMC from water vapor at 1300 ℃ for over 205 hours. Almost all Y2SiO5 transform into Y4.67(SiO4)3O after corrosion test. It is also found that in CMAS corrosion test, the reaction zone formed between CMAS and Y2SiO5 layer prevents the mutual diffusion of elements in CMAS and Y2SiO5 layer. The apparent activation energy of reaction between CMAS and Y2SiO5 in 1200~1300℃ temperature ranges is calculated to be 713.749kJ/mol. These findings provide a reference to select appropriate materials for TEBC.

Novel polymer-derived ceramic environmental barrier coating system for carbon steel in oxidizing environments

2017 ◽  
Vol 37 (5) ◽  
pp. 2001-2010 ◽  
Author(s):  
Minh Dat Nguyen ◽  
Jung Won Bang ◽  
An Su Bin ◽  
Soo-Ryoung Kim ◽  
Younghee Kim ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Coating System ◽  
Environmental Barrier ◽  
Environmental Barrier Coating ◽  
Barrier Coating ◽  
Polymer Derived Ceramic

EXPERIMENTAL OBSERVATIONS OF THE FAILURE MECHANISMS IN A BULK METALLIC GLASS COMPOSITE

2007 ◽  
Vol 1048 ◽  
Author(s):  
Hui Wang ◽  
Ashraf Bastawros ◽  
S. Bulent Biner
Keyword(s):  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Damage Evolution ◽  
Composite System ◽  
Shear Bands ◽  
In Situ Observation ◽  
Glass Composite ◽  
Evolution Behavior ◽  
Bulk Metallic Glass Composite

AbstractThe deformation and damage evolution behavior of a Ni-based bulk metallic glass composite reinforced with elongated brass phase is studied under cylindrical indentation. The estimated fracture toughness values based on the energy dissipation and the in-situ observation during the loading reveal the details of the damage evolution and toughening mechanisms in this composite system. The results indicate that the enhanced toughness of the BMG composite is plausibly an outcome of crack bridging mechanisms by the ductile brass phase, rather than a diffused array of nucleated shear bands in the hard BMG and arrest by the ductile reinforcing phase.

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