| Autor: |
Alci, Musa, Çelik, Erdal, Savran, Aydogan, Yigit, Recep, Yildirim, Serdar |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Zdroj: |
Materiali in tehnologije |
| Popis: |
In this study the application of a neural network to estimate the crack propagation and crack size in CeO2 coatings on a Ni substrate during processing at temperature was evaluated as a function of the Ce content in solutions with increasing processing temperatures from 24 °C and 700 °C. In this respect, CeO2 coatings were prepared on Ni tapes from solutions derived from Ce-based precursors using a sol-gel method for YBCO-coated conductors. The crack size of the coating was determined using an in-situ Hot-Stage ESEM depending on the temperature at a certain time in vacuum conditions. It was determined that the crack size of the coating increased with the increasing processing temperature. Measuring the crack sizes of the coatings using Hot-Stage ESEM is an expensive and time-consuming process. In order to eliminate these kinds of problems a neural-network approach was used to estimate the crack sizes of the coatings at different temperatures. The neural network was constructed directly from the experimental results. It was concluded that the estimation of the crack propagation of CeO2 coatings on a Ni tape substrate are reasonable for the processing temperatures. V tej študiji je bila ocenjena uporaba nevronske mreže za določanje širjenja razpoke in velikosti razpoke v premazu iz CeO2 na podlagi iz Ni med ogrevanjem kot funkcija vsebnosti Ce v raztopini med ogrevanjem od 24 °C do 700 °C. Za ta namen je bil pripravljen premaz iz CeO2 na traku iz Ni iz predhodne raztopine Ce z uporabo sol-gel metode za premaz na prevodniku YBCO. Velikost razpoke v premazu je bila določena v vročem z in-situ ESEM v odvisnosti od temperature po določenem času v vakuumu. Ugotovljeno je bilo, da velikost razpoke v premazu narašča z naraščanjem temperature procesa. Merjenje velikosti razpoke v vročem z uporabo ESEM je drag in časovno zamuden postopek. Za odpravo teh težav je bila za določanje velikosti razpoke v premazu pri različnih temperaturah uporabljena nevronska mreža. Ta je bila postavljena na podlagi eksperimentalnih rezultatov. Ugotovljeno je bilo, da je mogoče določanje širjenja razpoke v premazu CeO2 na traku iz Ni pri različnih temperaturah procesa. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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