Next Article in Journal
Effects of Coating Film Parameters on Thermal and Stress Distributions of Glass-Based Phosphor-Converted Color Wheels
Next Article in Special Issue
Oxidation Behavior of MoSi2-Coated TZM Alloys during Isothermal Exposure at High Temperatures
Previous Article in Journal
Improvement of Aluminium Film Adhesion on PMMA Using Pre-Layer and Specific Annealing
Previous Article in Special Issue
Corrosion Resistance of Pipeline Steel with Damaged Enamel Coating and Cathodic Protection
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Coatings 2018, 8(5), 187; https://doi.org/10.3390/coatings8050187

Influence of Lamellar Interface Morphology on Cracking Resistance of Plasma-Sprayed YSZ Coatings

1
Key Laboratory of Pressure System and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China
2
Shanghai Baosteel Industry Technological Service Co., Ltd., Shanghai 201900, China
*
Author to whom correspondence should be addressed.
Received: 21 March 2018 / Revised: 4 May 2018 / Accepted: 11 May 2018 / Published: 15 May 2018
(This article belongs to the Special Issue Coatings for Harsh Environments)
View Full-Text   |   Download PDF [21837 KB, uploaded 24 May 2018]   |  

Abstract

Splat morphology is an important factor that influences the mechanical properties and durability of thermal barrier coatings (TBCs). In this study, yttria-stabilized zirconia (YSZ) coatings with different lamellar interface morphologies were deposited by atmospheric plasma spraying (APS) using feedstocks with different particle sizes. The influence of lamellar interface roughness on the cracking resistance of the coatings was investigated. Furthermore, the thermal shock and erosion resistance of coatings deposited by two different powders was evaluated. It was found that the particle size of the feedstock powder affects the stacking morphology of the splat that forms the coating. Coatings fabricated from coarse YSZ powders (45–60 μm) show a relatively rough inter-lamellar surface, with a roughness about 3 times greater than those faricated from fine powders (15–25 μm). Coatings prepared with fine powders tend to form large cracks parallel to the substrate direction under indentation, while no cracking phenomena were found in coatings prepared with coarse powders. Due to the higher cracking resistance, coatings prepared with coarse powders show better thermal shock and erosion resistances than those with fine powders. The results of this study provide a reference for the design and optimization of the microstructure of TBCs. View Full-Text
Keywords: YSZ; particle size; lamellar interface; cracking resistance; thermal shocks; erosion YSZ; particle size; lamellar interface; cracking resistance; thermal shocks; erosion
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Huang, J.; Wang, W.; Lu, X.; Liu, S.; Li, C. Influence of Lamellar Interface Morphology on Cracking Resistance of Plasma-Sprayed YSZ Coatings. Coatings 2018, 8, 187.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top