Measurements of elastic modulus and fracture toughness of an air plasma sprayed thermal barrier coating using micro-cantilever bending
| العنوان: | Measurements of elastic modulus and fracture toughness of an air plasma sprayed thermal barrier coating using micro-cantilever bending |
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| المؤلفون: | Chen, Ying, Zhang, Xun, Zhao, Xiaofeng, Markocsan, Nicolaie, 1967, Nylén, Per, 1960, Xiao, Ping |
| المصدر: | Surface & Coatings Technology. 374:12-20 |
| مصطلحات موضوعية: | Elastic moduli, Ion beams, Microstructure, Nanocantilevers, Plasma jets, Plasma spraying, Thermal barrier coatings, Air plasma sprayed thermal barrier coatings, Direct measurement, Lifetime prediction, Measurements of, Micro-cantilevers, Micro-mechanical, Mode-i fracture toughness, Out-of-plane direction, Fracture toughness, Manufacturing and materials engineering, Produktions- och materialteknik, Production Technology, Produktionsteknik |
| الوصف: | The elastic modulus and fracture toughness of an air plasma sprayed thermal barrier coating (APS TBC) were measured using the micro-cantilever bending technique. The micro-cantilevers were machined by a focused ion beam with their central arms either parallel or normal to the bond coat/topcoat interface. Such orientations allowed direct measurements of both the in-plane and out-of-plane elastic moduli as well as mode I fracture toughness by bending. The calculated elastic modulus along the in-plane and out-of-plane direction is 144 GPa and 110 GPa, respectively, suggesting that the APS TBC is elastically anisotropic at microscale. The derived mode I fracture toughness along the plane parallel to the interface is 0.40 MPam. This relatively low toughness reflects the weak fracture resistance of the highly-flawed APS for short cracks at microscale. The measurements in this study can be incorporated into micromechanical life time prediction models of the APS TBCs. © 2019 Elsevier B.V. |
| وصف الملف: | |
| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-14455 https://www.research.manchester.ac.uk/portal/files/96877073/Measurements_of_Elastic_Modulus_and_Fracture_Toughness_of_an_Air_Plasma_Sprayed_Thermal_Barrier_Coating_Using_Micro_Cantilever_Bending.pdf |
| قاعدة البيانات: | SwePub |
| تدمد: | 02578972 18793347 |
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| DOI: | 10.1016/j.surfcoat.2019.05.031 |