Thermal shock resistance of bimodal structured thermal barrier coatings by atmospheric plasma spraying using nanostructured partially stabilized zirconia

Yang, Deming; Gao, Yang; Liu, Hongjun; Sun, Chao

doi:10.1016/j.surfcoat.2017.01.112

Cited by 50 publications

(10 citation statements)

References 23 publications

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“…The 20 µm Al-modi ed TBCs showed an optimal thermal cycle performance (Fig. 6a) compared to the other APS and EB-PVD TBCs [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48] . In this work, the as-sprayed and Al-modi ed TBCs were compared, shown in Figs.…”

Section: Comparison Of Thermal Cycle Performancementioning

confidence: 99%

A solution to the challenges of particle erosion and thermal cycle for PS-PVD 7YSZ thermal barrier coatings

Zhang

et al. 2021

Preprint

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Advanced aero-engine is a key technique that is used all over the world, where many high-temperature components such as turbine blades and combustor, are made of Ni/Co/Fe based superalloys. However, they need high-temperature protection to avoid fast performance degradation. Generally, the superalloy high-temperature components are protected by thermal barrier coatings (TBCs) obtained via an atmospheric plasma spray (APS) and an electron beam-physical vapor deposition (EB-PVD). Here, a novel 3rd generation TBCs process using plasma spray-physical vapor deposition (PS-PVD) is presented, showing a more promising use than the traditional APS and EB-PVD. The PS-PVD feature uses evaporating ceramic powder, which results in the deposition of a feather-like columnar coating. This special microstructure showed good strain tolerance and non-line-of-sight (NLOS) deposition, giving great potential for application. In a working aero-engine, the high-temperature components face a serious environment, where foreign particle erosion is a great challenge and is the first barrier to the application of PS-PVD TBCs. As a solution, an Al-modification approach was proposed in this investigation. The results demonstrate that this approach can improve particle erosion resistance. Also, the thermal cycle performance had an apparent optimization.

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Section: Comparison Of Thermal Cycle Performancementioning

confidence: 99%

A solution to the challenges of particle erosion and thermal cycle for PS-PVD 7YSZ thermal barrier coatings

Zhang

et al. 2021

Preprint

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“…Roof cutting pressure releasing technology in the retracement channel had been proposed and applied in many coalmines, such as Tashan [14], Halagou [15] and Ningtiaota [16]. A few key technologies with independent intellectual property rights have been formed by studying the safe and efficient mining of an 8-m-thick coal seam, which achieves more than 15.5 Mt/a [17]. The coal resources in northwest China are abundant, which are characterized by a shallow-buried depth, stable occurrence, hard coal quality and poor caving ability; therefore, it is suitable for high-intensity mining.…”

Section: Introductionmentioning

confidence: 99%

Using the Magnetotelluric Method for Detecting Aquifer Failure Characteristics under High-Intensity Mining of Thick Coal Seams

et al. 2019

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In the ecologically fragile mining area of northwest China, high-intensity mining has seriously affected the aquifer and surface eco-environment. In order to better implement water-preserved mining in ecologically fragile areas, the aquifer failure characteristics should be first detected accurately; therefore, it is necessary to find a convenient and fast detection method. Based on the analysis of the basic principles and influencing factors of the magnetotelluric (MT) method, the feasibility of using the MT method to detect aquifer failure is verified by testing the mined area with MT detection and field borehole measurement. Subsequently, the failure characteristics of overburden and unconsolidated aquifers under high-intensity mining are studied by MT detection and physical simulation. By comparing the physical simulation with the field measurement from the aspects of the maximum surface subsidence, interval of periodic weighting and step cracks, the reliability of the height of the water flowing fracture zone and caving zone obtained from physical simulation is verified. The analysis from MT detection and physical simulation shows that the results of the two methods are in accord with each other, which further confirms that the MT method can be used to detect the failure of overburdened structures and aquifers. The penetrating fractures are the main channel for the downward seepage of water resources, which is caused by the “two-zone” of overburden model and located in the “dimple” shape in the apparent resistivity (AR) isogram. It can provide a reference and technical support for the corresponding new water-preserved mining technology and the construction of digital mines.

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“…Research and development of nanotechnology and nanomaterials have further promoted and expanded the development of APS [12]. The plasma-sprayed nanostructured 8YSZ coatings can be obtained using nanostructured powder feedstocks and it has been demonstrated that nanostructured 8YSZ coatings present more remarkable properties than microstructured counterparts [13][14][15][16][17][18][19][20]. Therefore, it is necessary and significant to develop nanostructured 8YSZ coatings.…”

Section: Introductionmentioning

confidence: 99%

Depth-Sensing Indentation Creep Behavior of Nanostructured Thermal Barrier Coatings from As-Synthesized t’-8YSZ Feedstocks

et al. 2019

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Nano-indentation is a popular method to characterize the micromechanical properties of nanostructured 8YSZ coatings. However, little research has focused on the creep behavior of nano-indentation and only the elastic modulus and nanohardness have been analyzed. Herein, for the first time, the nano-indentation creep behavior of plasma-sprayed nanostructured 8YSZ coatings using as-prepared nanostructured non-transformable tetragonal (t') feedstocks was investigated. The indentation creep behavior can be well characterized by the power-law equation and the strain rate sensitivity has been calculated in light of the equation. The strain rate sensitivity was sensitive to the load and the reasons were analyzed in detail. The current results can further guide and design thermal barrier coatings from the point of indentation creep property.Mechanical properties, embodying elastic modulus, hardness, fracture toughness and bonding strength, are extremely essential to ensure coatings with functionality, reliability, and durability during service [17,[20][21][22]. In addition to tensile testing for bonding strength, nano-indentation is also required and useful for most measurements or calculation of these mechanical properties. Nano-indentation tests in references have mostly focused on the modulus of elasticity, nano-hardness, and calculation of the fracture toughness of coatings [23][24][25]. However, these references pay little attention to the creep behavior of nanostructured 8YSZ coatings. Concerning nanostructured 8YSZ thermal barrier coatings, the stress state and distribution have influences on the properties of coatings [1,6]. It has been reported that the creep property of 8YSZ coatings can determine the stress distribution [26]. Therefore, it is of great importance to study the creep property of nanostructured 8YSZ coatings.Our previous work prepared and investigated high-performance non-transformable tetragonal (t') 8YSZ feedstocks with nanostructure [27]. In this paper, we fabricated high-performance nanostructured 8YSZ coatings from t' feedstocks using the APS method. The creep behavior of nanostructured 8YSZ coatings was studied by nano-indentation for the purpose of filling in this research gap.

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Thermal shock resistance of bimodal structured thermal barrier coatings by atmospheric plasma spraying using nanostructured partially stabilized zirconia

Cited by 50 publications

References 23 publications

A solution to the challenges of particle erosion and thermal cycle for PS-PVD 7YSZ thermal barrier coatings

A solution to the challenges of particle erosion and thermal cycle for PS-PVD 7YSZ thermal barrier coatings

Using the Magnetotelluric Method for Detecting Aquifer Failure Characteristics under High-Intensity Mining of Thick Coal Seams

Depth-Sensing Indentation Creep Behavior of Nanostructured Thermal Barrier Coatings from As-Synthesized t’-8YSZ Feedstocks

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