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- W2896431130 abstract "Structured bond coat (BC) is a g enerally accept method for improving the adhesion of thermal barrier coatings (TBCs) hence the thermal barrier effect. To manufacture structured BC with good adhesion the laser cladding method was used. The triangular structured BC (NiCrAlY) was clad on the substrate (Ni-based superalloy DZ4125) with optimized laser processing parameters. The top coat (TC) with ceramic material ZrO2-8%Y2O3 was further deposited by atmosphere plasma spraying (APS). The microstructure of the cladded BC and the sprayed TC were detected by scanning electron microscope (SEM). Their adhesion or cohesion were measured by the tensile test. To explain the tensile stress induced fracture the distribution of stress in three different models were simulated by finite element method. The results show that the adhesion of laser cladded BC is 175MPa. It meets the requirement of metallurgical bonding. Unlike the non-structured TBCs the TC of the structured one is not fully spall off the substrate with the help of the triangular BC. However the cohesion of the latter TC is still lower due to the poor adhesions on the perpendicular interface of BC and TC, the interface of BC and the glue used in tensile test.Structured bond coat (BC) is a g enerally accept method for improving the adhesion of thermal barrier coatings (TBCs) hence the thermal barrier effect. To manufacture structured BC with good adhesion the laser cladding method was used. The triangular structured BC (NiCrAlY) was clad on the substrate (Ni-based superalloy DZ4125) with optimized laser processing parameters. The top coat (TC) with ceramic material ZrO2-8%Y2O3 was further deposited by atmosphere plasma spraying (APS). The microstructure of the cladded BC and the sprayed TC were detected by scanning electron microscope (SEM). Their adhesion or cohesion were measured by the tensile test. To explain the tensile stress induced fracture the distribution of stress in three different models were simulated by finite element method. The results show that the adhesion of laser cladded BC is 175MPa. It meets the requirement of metallurgical bonding. Unlike the non-structured TBCs the TC of the structured one is not fully spall off the substrate with the ..." @default.
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- W2896431130 date "2014-01-01" @default.
- W2896431130 modified "2023-09-28" @default.
- W2896431130 title "Laser cladding of structured bond coat on Ni-based superalloy" @default.
- W2896431130 doi "https://doi.org/10.2351/1.5063023" @default.
- W2896431130 hasPublicationYear "2014" @default.
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