Atmospheric plasma sprayed 7%-YSZ thick thermal barrier coatings with controlled segmentation crack densities and its thermal cycling behavior

Tailor, Satish; Upadhyaya, Rohit; Manjunath, S.; Dub, A. V.; Modi, Ankur; Modi, S. C.

doi:10.1016/j.ceramint.2017.10.219

Cited by 31 publications

(8 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…APS was commonly used in the past to prepare thermal barrier coatings because it is easier to prepare thermal barrier coatings with APS technology and the thermal conductivity of the coating is relatively low [66]. Nevertheless, the unavoidable disadvantage of the APS technology is that the layered structure coatings it produces usually contain a large amount of lateral micro-cracks that are likely to expand due to the thermal stress in high temperature environments, which can cause the coatings to fall off and prematurely fail [67]. Therefore, for propulsion systems of hypersonic aircrafts, it is of great significance to develop thermal barrier coatings with a small thermal conductivity and a strong anti-seismic ability.…”

Section: Latest Research Progress Of Thermal Barrier Coatingmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

View full text Add to dashboard Cite

Combined-cycle engine is a potential propulsion system for hypersonic aircraft. To ensure long-term, normal operation of combined-cycle engine under the harsh environment of high thermal load, it is of great significance to study the thermal protection and management of the propulsion system. In this study, the objective and development status of thermal protection and thermal management systems for the combined-cycle propulsion system were described. The latest research progresses of thermal protection, thermal barrier coating, and thermal management system of the combined-cycle propulsion system were summarized. Moreover, the problems and shortcoming in current researches were summarized. In addition, a prospect for the future development of thermal protection and management of the combined-cycle propulsion system was presented, pointing out a direction of great value and vital research significance to thermal protection and management of the combined-cycle propulsion system.

show abstract

Section: Latest Research Progress Of Thermal Barrier Coatingmentioning

confidence: 99%

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

et al. 2019

View full text Add to dashboard Cite

show abstract

“…From the thermal conductivity results of coated and uncoated sample, it clearly shows that the deposition method also influenced the thermal conductivity of the ceramic coated substrate. This is because a common APS method produced a coating with a microstructure characteristics that consist of cracks and pores with the level of porosity of 10-30%, that can decrease a coatings thermal conductivity to less than 1 W/mK [25]. The presence of porosity very useful to reduce thermal conductivity values.…”

Section: Fig 5 the Edx Analysis At Different Spot For Mullite Samplementioning

confidence: 99%

The Thermal Conductivity of 8 Yttria Stabilized Zirconia and Mullite Thermal Barrier Coating on Medium Carbon Steel Substrate

Zaini*,

Adenan*,

Saedon

et al. 2019

IJEAT

View full text Add to dashboard Cite

Thermal conductivity is one of the main features of a thermal barrier coating (TBC) that is important in making sure that the TBC gives its best functionality to the system. A good TBC has low thermal conductivity, so that the temperature can drop across the coating which allows the system to operate in extremely high temperatures. There are several factors that can influence the thermal conductivity of the TBC such as the type of ceramic material used, the deposition method and the physical features of the TBC itself. For this research, air plasma spray (APS) is used to deposit 8 wt% yttria stabilized zirconia (8YSZ) and mullite on medium carbon steel substrates to study their respective thermal conductivities. The aim here is to develop a heat shield using TBC to protect the electric motor in an electrical turbocompounding system. The characteristics of the deposited TBC such as microstructure, element composition, phases and thermal conductivity are studied. The thermal conductivity is reduced when medium carbon steel substrate deposited with TBC. The thermal conductivity of 8YSZ, mullite and uncoated sample at minute 60 is 0.868 W/mK, 0.903 W/mK and 1.057 W/mK, respectively. Therefore, the deposition of 8YSZ TBC can lower the thermal conductivity of the medium carbon steel heat shield.

show abstract

“…TBCs are usually multi layered structure, in which the top layer is made of ceramic material with low thermal conductivity. Then, a metallic bond coat layer of a nickel based superalloy is used underneath the top coat to enhance adhesion between substrate and top coat and protects the substrate from corrosion and oxidation [13], and a thermally grown oxide layer between the top and the bond coats that forms due to the oxidation of the bond coat [14]. Two main methods are usually used for manufacturing TBCs top coat, namely: Atmospheric Plasma Spray (APS), and Electron Beam Physical Vapor Deposition (EB-PVD) [15].Other new methods include suspension plasma spray [16] solution precursor plasma spray [17], plasma spray-physical vapor deposition [18] and electrophoretic deposition [19].…”

Section: Introductionmentioning

confidence: 99%

Thermal shock resistance of yttrium aluminium oxide Y3Al5O12 thermal barrier coating for titanium alloy

Almomani¹,

Al‐Widyan²,

Mohaidat³

2020

JMES

View full text Add to dashboard Cite

The high strength-to- weight ratio of titanium alloys allows their use in jet engines. However, their use is restricted by susceptibility to oxidation at high temperatures. In this study, the possibility of increasing the operating temperature of titanium alloys through using Yttrium Aluminum Oxide (YAG) as a thermal barrier coating material for Ti-6Al-4V substrate is studied. The study concludes that YAG can be utilized to increase the operating temperature of Ti-6Al-4V titanium alloy from around 350 °C to 800 °C due to its low thermal conductivity and phase stability up to its melting point. In addition, its lower oxygen diffusivity in comparison with the standard YSZ material will provide a better protection of the titanium substrate from oxidation. In this work, coating was created using atmospheric plasma spray. X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) were used to examine coatings' composition and structure. The coating was characterized by thermal shock test, Vickers hardness test and adhesion strength test. X-ray diffraction indicated that the coating was of a partially crystalline Y3Al5O12 composition. The coating was porous with excellent thermal shock resistance at 800 oC, with a Vickers micro-hardness of 331.35 HV and adhesion strength of 17.6 MPa.

show abstract

Atmospheric plasma sprayed 7%-YSZ thick thermal barrier coatings with controlled segmentation crack densities and its thermal cycling behavior

Cited by 31 publications

References 34 publications

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

Thermal Protection System and Thermal Management for Combined-Cycle Engine: Review and Prospects

The Thermal Conductivity of 8 Yttria Stabilized Zirconia and Mullite Thermal Barrier Coating on Medium Carbon Steel Substrate

Thermal shock resistance of yttrium aluminium oxide Y3Al5O12 thermal barrier coating for titanium alloy

Contact Info

Product

Resources

About