Oxidation and diffusion barrier behaviors of double-layer NiCoCrAlY coatings produced by plasma activated EB-PVD

Peng, Hui; Guo, Hongbo; He, Jian; Gong, Shengkai

doi:10.1016/j.surfcoat.2011.04.017

Cited by 27 publications

(4 citation statements)

References 39 publications

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“…Therefore, the difference in diffusion flux of Al reaching the oxide/metal interface is determined by the lattice diffusion. In addition, the lattice diffusivity might approach the grain boundary diffusivity at a high enough temperature (> 0.6Tm) [39].…”

Section: Understanding On the Oxidation Resistancementioning

confidence: 99%

Air plasma sprayed high-entropy AlCoCrFeNiY coating with excellent oxidation and spallation resistance under cyclic oxidation at 1050–1150 °C

et al. 2022

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Section: Understanding On the Oxidation Resistancementioning

confidence: 99%

Air plasma sprayed high-entropy AlCoCrFeNiY coating with excellent oxidation and spallation resistance under cyclic oxidation at 1050–1150 °C

et al. 2022

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“…The antioxidant capacity of the bond coat can be improved via the composition or microstructure of the bond coat [40][41][42][43], such as controlling the interface between the splats in the coating [43], a double-layer structure [44], and a column-like microstructure [45]. Gong [44] indicated that a double-layer MCrAlY (M = Ni, Co or Ni + Co) bond coat can provide excellent functions for both oxidation resistance and diffusion resistance, hence improves the durability of TBCs. Cao [46] pointed out that the scale adherence strength in double-layer bond coat system is higher than that in traditional bond coat systems.…”

Section: Introductionmentioning

confidence: 99%

The Evaluation of Durability of Plasma-Sprayed Thermal Barrier Coatings with Double-layer Bond Coat

Peng

Dong

et al. 2019

Coatings

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The durability of atmospheric plasma-sprayed thermal barrier coatings (APS TBCs) with a double-layer bond coat was evaluated via isothermal cycling tests under 1120 °C. The bond coat consisted of a porosity layer deposited on the substrate and an oxidation layer deposited on the porosity layer. Two types of double-layer bond coats with different thickness ratios of the porosity layer to the oxidation layer (type A: 1:2 and type B: 2:1, respectively) were prepared. The results show that the porosity layer was oxidation free, the oxidation layer included a fraction of well-distributed α-Al2O3. The coefficient of thermal expansion of the oxidation layer was about 11.2 × 10−6 K−1, which was rather lower than that of the porosity layer. Thus, the oxidation layer can be regards as a secondary bond coat between ceramic topcoat and traditional bond coat. The thermal cyclic lifetime of type A TBCs was about 60 cycles, which exceeded 1.2 times the durability of type B TBCs. The delamination cracks in both TBCs all propagated in the ceramic topcoat, which were all identical to those in traditional TBCs. Therefore, the design of the double-layer bond coat affected the stress level rather than the stress distribution in TBCs.

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“…Ti, Zr, W, and Mo, but not for the application of other metals and alloys with low melting point. Recently, Peng et al expanded the application range of SAD [9,10]. A Nb molten pool was introduced to increase the temperature and thermal electron emissivity of the molten pool.…”

Section: Introductionmentioning

confidence: 99%

Deposition of TiN by plasma activated EB-PVD: Activation by thermal electron emission from molten niobium

Peng

Zhou

Zhang³

et al. 2015

Surface and Coatings Technology

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Oxidation and diffusion barrier behaviors of double-layer NiCoCrAlY coatings produced by plasma activated EB-PVD

Cited by 27 publications

References 39 publications

Air plasma sprayed high-entropy AlCoCrFeNiY coating with excellent oxidation and spallation resistance under cyclic oxidation at 1050–1150 °C

Air plasma sprayed high-entropy AlCoCrFeNiY coating with excellent oxidation and spallation resistance under cyclic oxidation at 1050–1150 °C

The Evaluation of Durability of Plasma-Sprayed Thermal Barrier Coatings with Double-layer Bond Coat

Deposition of TiN by plasma activated EB-PVD: Activation by thermal electron emission from molten niobium

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