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Author Huang, Heji ♦ Eguchi, Keisuke ♦ Yoshida, Toyobu
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©2006
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword crack density ♦ flattening degree ♦ hybrid plasma ♦ large powder spraying ♦ single-splat deformation ♦ thermal barrier coatings ♦ thermal plasma spray ♦ Surfaces and Interfaces, Thin Films ♦ Tribology, Corrosion and Coatings ♦ Materials Science ♦ Characterization and Evaluation of Materials ♦ Operating Procedures, Materials Treatment ♦ Analytical Chemistry
Abstract To testify to the advantage of large ceramic powder spraying, numerical simulations and experimental studies on the behavior of large yttria-stabilized zirconia (YSZ) powder in a high-power hybrid plasma spraying process have been carried out. Numeric predictions and experimental results showed that, with the high radio frequency (RF) input power of 100 kW, the most refractory YSZ powder with particle sizes as large as 88 μm could be fully melted and well-flattened splats could be formed. A large degree of flattening (ξ) of 4.7 has been achieved. The improved adhesive strength between the large splat and the substrate was confirmed based on the measurement of the crack density inside of the splats. A thick YSZ coating >300 μm was successfully deposited on a large CoNiCrAlY-coated Inconel substrate (50×50×4 mm in size). The ultradense microstructure without clear boundaries between the splats and the clean and crack-free interface between the top-coat and the bond-coat also indicate the good adhesion. These results showed that highpower hybrid plasma spraying of large ceramic powder is a very promising process for deposition of highquality coatings, especially in the application of thermal barrier coatings (TBCs).
ISSN 10599630
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2006-01-01
Publisher Place New York
e-ISSN 15441016
Journal Journal of Thermal Spray Technology
Volume Number 15
Issue Number 1
Page Count 11
Starting Page 72
Ending Page 82

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Source: SpringerLink