Study on thermal barrier coatings deposited by detonation gun spraying

Ke, Peiling; Wu, Yao; Wang, Q.M.; Gong, Junhui; Sun, Chencheng; Lei, Wen

doi:10.1016/j.surfcoat.2004.07.107

Cited by 28 publications

(13 citation statements)

References 14 publications

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“…The combustion cycle is repeated with a frequency of 3 to 6 Hz to produce a semicontinuous stream of heated and highly accelerated particles. The result is a coating with better adherence strength and reduced porosity to those deposited through the use of conventional flame spray techniques ( Ref 16,45,46).…”

Section: Detonation Gun (D-gun) Sprayingmentioning

confidence: 99%

Beyond Traditional Coatings: A Review on Thermal-Sprayed Functional and Smart Coatings

et al. 2019

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Thermal spraying has been present for over a century, being greatly refined and optimised during this time. It has become nowadays a reliable and cost-efficient method to deposit thick coatings with a wide variety of feedstock materials and substrates. Thermal sprayed coatings have been successfully applied in fields such as aerospace or electricity production, becoming an essential component of today's industry. To overpass the traditional capabilities of those coatings, new functionalities and coherent responses are being integrated, opening the field of functional and smart coatings. The aim of this paper is to present a comprehensive review of the Advantage has been taken of a beneficial phase transformation triggered by the correspondent event (such as a crack or the tribological interactions respectively) to promote self-healing.Another approach has been the release of an encapsulated component which effectively heals the coating or provides lubrication when required. All these exciting developments pave the way for the numerous applications that are to come in the next decade, making the field of thermal sprayed coatings a unique opportunity for research and development.

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Section: Detonation Gun (D-gun) Sprayingmentioning

confidence: 99%

Beyond Traditional Coatings: A Review on Thermal-Sprayed Functional and Smart Coatings

et al. 2019

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“…Gas detonation sprayed (GDS) intermetallic coatings composed of the phases in the Fe-Al system are characterized by a unique sandwich microstructure of layers which are responsible for high degree of hardness, thermal stability, high corrosion resistance, good adhesion and very good tribological properties of the GDS modified surface layer of engineering components [1][2][3][4][5][6][7][8][9][10][11][12]. It has already been shown [13][14][15] that the Fe-Al intermetallic compounds obtained by self-decomposition are extremely useful for GDS spraying on construction steel.…”

Section: Introductionmentioning

confidence: 99%

Gas detonation spray forming of Fe–Al coatings in the presence of interlayer

Senderowski

Bojar

2008

Surface and Coatings Technology

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“…Ma et al and Kim et al conquered some technical difficulties, such as low torch temperature and very short heating time for YSZ ceramic particles of a high melting point, by optimizing the spray parameters, especially the ratio of C 2 H 2 to O 2 11,12 . Recently, TBCs of low thermal conductivity 13 and excellent durability 14 were also successfully obtained using D‐gun spraying in our research group. The primary failure mechanism of D‐gun TBCs involves the depletion of aluminum in the bond coat and formation of non‐alumina oxides, mainly Cr 2 O 3 and NiO, within the TGO layer.…”

Section: Introductionmentioning

confidence: 91%

Stresses and Microstructural Development of Thermal Barrier Coatings Using AIP/D‐gun Two‐Step Processing

Wang

Hua

et al. 2007

Journal of the American Ceramic Society

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After depositing a Ni-32Co-20Cr-8Al-0.5Y-1Si-0.03B (wt%) bond coat on a Ni-base superalloy using arc ion plating (AIP), a ceramic top coat with hollow spherical powder of ZrO 2 -8 wt%Y 2 O 3 (HSP-YSZ) was deposited using detonation gun (D-gun) spraying. Thermal exposure behaviors of thermal barrier coatings (TBCs) were investigated at 11001C. The thermal growth oxides (TGO) layer thickened and became more undulated during thermal exposure. Yttrium aluminum garnet (YAG) was observed within TGO, which produced thickness imperfections and thus aided to build up out-of-plane stresses. As a result, radial cracks initiated at the defects around TGO imperfections and separation developed through crack nucleation, propagation, and coalescence at the weaker TGO/bond coat interface. With further thermal exposure, coalescence of interfacial separations created a connected crack. The TBC detached and final failure occurred at the TGO/bond coat interface, leading to spallation of TBC when cooling to ambient. The stress distributions in the TGO layer with different thermal exposure times were also measured using luminescence spectroscopy. The stresses were independent of time after a transient period from h-Al 2 O 3 to a-Al 2 O 3 scale. It is suggested that the lifetime of AIP/D-gun TBCs with an HSP-YSZ coat is controlled by the initiation and linking of a sub-critical interfacial crack.

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Study on thermal barrier coatings deposited by detonation gun spraying

Cited by 28 publications

References 14 publications

Beyond Traditional Coatings: A Review on Thermal-Sprayed Functional and Smart Coatings

Beyond Traditional Coatings: A Review on Thermal-Sprayed Functional and Smart Coatings

Gas detonation spray forming of Fe–Al coatings in the presence of interlayer

Stresses and Microstructural Development of Thermal Barrier Coatings Using AIP/D‐gun Two‐Step Processing

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