State of the Art Thermal Barrier Coating (TBC) Materials and TBC Failure Mechanisms 

2016 ◽  
pp. 441-452 ◽  
Author(s):  
Abdullah Cahit Karaoglanli ◽  
Kadir Mert Doleker ◽  
Yasin Ozgurluk
Keyword(s):  
Thermal Barrier Coating ◽  
State Of The Art ◽  
Failure Mechanisms ◽  
Thermal Barrier ◽  
Barrier Coating

Multi-scale failure mechanisms of thermal barrier coating systems

2013 ◽  
Vol 80 ◽  
pp. 27-34 ◽  
Author(s):  
Philipp Seiler ◽  
Martin Bäker ◽  
Joachim Rösler
Keyword(s):  
Thermal Barrier Coating ◽  
Failure Mechanisms ◽  
Thermal Barrier ◽  
Multi Scale ◽  
Barrier Coating ◽  
Scale Failure

scholarly journals Influence of Pt Addition and Manufacturing Process on the Failure Mechanisms of NiCoCrAlYTa-Base Thermal Barrier Coating Systems under Thermal Cycling Conditions

Metals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 771 ◽  
Author(s):  
Aurelie Vande Put ◽  
Djar Oquab ◽  
Aymeric Raffaitin ◽  
Daniel Monceau
Keyword(s):  
Thermal Cycling ◽  
Thermal Barrier Coating ◽  
Failure Mechanisms ◽  
Surface Preparation ◽  
Deposition Process ◽  
Thermal Barrier ◽  
Degradation Mechanisms ◽  
Bond Coating ◽  
Barrier Coating ◽  
Coating Microstructure

The cyclic oxidation of NiCoCrAlYTa-base thermal barrier coating systems was investigated at 1100 °C. The influence of the NiCoCrAlYTa deposition process, the coating modification by a Pt-overlayer, and the surface preparation steps were studied. Thermal cycling results showed that the addition of a Pt-overlayer, a dense and oxide-free bond-coating microstructure, together with a smooth NiCoCrAlYTa surface prior to Pt deposition and a suitable surface preparation before thermal barrier deposition all increase the lifetime. Degradation mechanisms are proposed to explain how coating defects develop during thermal cycling and how the fabrication process influences both failure and lifetime.

HOT CORROSION OF CERIA-YTTRIA STABILIZED ZIRCONIA PLASMA SPRAYED THERMAL BARRIER COATING BY EUTECTIC VANDIUM PENTAOXIDE-SODIUM SULFATE

2018 ◽  
Vol 18 (1) ◽  
pp. 182-192 ◽  
Author(s):  
Mohammed J Kadhim ◽  
Mohammed H Hafiz ◽  
Maryam A Ali Bash
Keyword(s):  
Thermal Barrier Coating ◽  
Hot Corrosion ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
High Volume ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Plan View ◽  
Barrier Coating ◽  
Plasma Sprayed

The high temperature corrosion behavior of thermal barrier coating (TBC) systemconsisting of IN-738 LC superalloy substrate, air plasma sprayed Ni24.5Cr6Al0.4Y (wt%)bond coat and air plasma sprayed ZrO2-20 wt% ceria-3.6 wt% yttria (CYSZ) ceramic coatwere characterized. The upper surfaces of CYSZ covered with 30 mg/cm2 , mixed 45 wt%Na2SO4-55 wt% V2O5 salt were exposed at different temperatures from 800 to 1000 oC andinteraction times from 1 up to 8 h. The upper surface plan view of the coatings wereidentified for topography, roughness, chemical composition, phases and reaction productsusing scanning electron microscopy, energy dispersive spectroscopy, talysurf, and X-raydiffraction. XRD analyses of the plasma sprayed coatings after hot corrosion confirmed thephase transformation of nontransformable tetragonal (t') into monoclinic phase, presence ofYVO4 and CeVO4 products. Analysis of the hot corrosion CYSZ coating confirmed theformation of high volume fraction of YVO4, with low volume fractions of CeOV4 and CeO2.The formation of these compounds were combined with formation of monoclinic phase (m)from transformation of nontransformable tetragonal phase (t').

Evaluation of Spatial Resolution of Nondestructive Testing of Thermal Barrier Coating by Terahertz Imaging

2012 ◽  
Vol 132 (10) ◽  
pp. 864-870
Author(s):  
Tetsuo Fukuchi ◽  
Norikazu Fuse ◽  
Mitsutoshi Okada ◽  
Tomoharu Fujii ◽  
Maya Mizuno ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Thermal Barrier Coating ◽  
Spatial Resolution ◽  
Terahertz Imaging ◽  
Thermal Barrier ◽  
Barrier Coating

Surface Roughness Measurement of Thermal Barrier Coating using Terahertz Waves

2017 ◽  
Vol 137 (3) ◽  
pp. 147-152 ◽  
Author(s):  
Tetsuo Fukuchi ◽  
Norikazu Fuse ◽  
Mitsutoshi Okada ◽  
Tomoharu Fujii ◽  
Maya Mizuno ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Thermal Barrier Coating ◽  
Thermal Barrier ◽  
Roughness Measurement ◽  
Terahertz Waves ◽  
Surface Roughness Measurement ◽  
Barrier Coating
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