Influence of high temperature exposure on the adhesion of a micro-composite refractory enamel to a Ni–18Cr–12W superalloy
| Autor: | Victor Manoliu, C. E. Sfat, Ramona Nicoleta Turcu, Alecs Andrei Matei, Iulian Vasile Antoniac, Ion Pencea, Mihai Branzei |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Enamel paint Composite number Metallurgy 030206 dentistry 02 engineering and technology Surfaces and Interfaces General Chemistry Adhesion 021001 nanoscience & nanotechnology Isothermal process Surfaces Coatings and Films Thermal barrier coating Superalloy 03 medical and health sciences 0302 clinical medicine Hot working Mechanics of Materials visual_art Materials Chemistry visual_art.visual_art_medium Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Journal of Adhesion Science and Technology. 31:2555-2570 |
| ISSN: | 1568-5616 0169-4243 |
| DOI: | 10.1080/01694243.2017.1310172 |
| Popis: | A new micro-composite refractory enamel (MCRE) was designed to play a multifunctional protective role (thermal barrier coating, corrosive and erosive protection) for the hot working parts made of EI868 superalloy sheets i.e. burning chambers, fire tubes, volets, eclises, etc. The effect of the isothermal heating at elevates temperature (800 °C, 900 °C) were, for the first time, investigate for MCRE/EI868 couple. The adhesion strength has shown an enhancement of about 100% when the couple was heated at 800 °C or at 900 °C for 10 h compared with the unexposed one. SEM-EDS, OM, XRD, EDP-XRFS and SDAR-OES investigations support a chemical bonding mechanism between MCRE and EI868 substrate via a transient interface layer. Elemental EDS distributions show that the Cr selective oxidation is responsible for the formation of the transient layer. The XRD measurements can be correlated with the contribution of the spinellic transformation of the SiO2, Cr2O3, NiO to the adhesion enhancement. The most importan... |
| Databáze: | OpenAIRE |
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