| 1. Identity statement | |
| Reference Type | ePrint (Electronic Source) |
| Site | mtc-m16c.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | sid.inpe.br/yolanda/2004/12.08.14.09 |
| Last Update | 2005:01.28.12.24.48 (UTC) administrator |
| Metadata Repository | sid.inpe.br/yolanda/2004/12.08.14.09.51 |
| Metadata Last Update | 2018:06.04.04.23.20 (UTC) administrator |
| Citation Key | AlmeidaSilvNonoCair::EBTBZi |
| Title | EB-PVD TBCs of zircodia co-doped with yttria and niobia a microstructural investigation  |
| Last Update Date | 2004-12-09 |
| Access Date | 2024, May 19 |
| Type of Medium | On-line |
| Number of Files | 1 |
| Size | 1205 KiB |
| 2. Context | |
| Author | 1 Almeida, D. S. 2 Silva, C. R. M. 3 Nono, Maria do Carmo de Andrade 4 Cairo, C. A. A. |
| Resume Identifier | 1 2 3 8JMKD3MGP5W/3C9JHRC |
| Group | 1 LAS-INPE-MCT-BR |
| Affiliation | 1 Centro Técnico Aeroespacial - Divisão de Materiais AMR-CTA |
| e-Mail Address | dsa62@yahoo.com |
| Producer | Instituto Nacional de Pesquisas Espaciais |
| City | São José dos Campos |
| History (UTC) | 2008-04-26 01:39:03 :: jefferson -> administrator :: 2018-06-04 04:23:20 :: administrator -> marciana :: |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | work-in-progress |
| Transferable | 1 |
| Keywords | SEM X-ray electron beam evaporation niobium oxide zirconium |
| Abstract | Turbine blades of airplanes and thermoelectric plants work in adverse conditions, with corrosive environment and high temperature and pressure. One way to improve the life and/or the working temperature of the blades is the use of special coatings over metallic material applied by Electron Beam Physical Vapor Deposition (EB-PVD). The most usual material for this application is yttria doped zirconia. Addition of niobia, as a co-dopant in the Y2O3-ZrO2 system, can reduce the thermal conductivity and improve mechanical properties of the coating. The purpose of this work is to show the influence of the addition of niobia on the microstructure of ceramic coatings by using x-ray diffraction (XRD) techniques and scanning electron microscopy (SEM) observations. SEM on fractured cross section shows a columnar structure and the results of XRD show only zirconia tetragonal phase in the ceramic coating for the chemical composition range studied. As the difference (NbO2.5 - YO1.5) mol % increases, the ratio c/a (tetragonality) increases. Considering that the t-ZrO2 solid solutions begins unstable when the relation c/a exceeds 1.020, it is possible to evaluate the maximum niobia content that can be added to the coating without losses in its mechanical properties. SEM on ceramic coatings polished cross section shows color bands associated with chemical composition changes due to the differences in saturation vapor pressure of the individual components. As the niobia content increases, there is a tendency to reduction of the ceramic coating theoretical density. . |
| Area | FISMAT |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAS > EB-PVD TBCs of... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| data URL | http://urlib.net/ibi/sid.inpe.br/yolanda/2004/12.08.14.09 |
| zipped data URL | http://urlib.net/zip/sid.inpe.br/yolanda/2004/12.08.14.09 |
| Language | English |
| Target File | v1.pdf |
| User Group | administrator jefferson |
| Visibility | shown |
| Update Permission | transferred to ePrint update |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ESR3H2 |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.55.40 2 |
| Host Collection | sid.inpe.br/mtc-m18@80/2008/03.17.15.17 |
| 6. Notes | |
| Notes | Journal of Surface Coating and Technology |
| Empty Fields | accessyear alternatepublication archivingpolicy archivist contenttype copyholder copyright creatorhistory descriptionlevel dissemination doi edition electronicmailaddress format identifier isbn issn label lineage mark mirrorrepository nextedition orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup readpermission rightsholder schedulinginformation secondarydate secondarykey secondarymark secondarytype session shorttitle sponsor stageofalternatepublication subject tertiarymark tertiarytype url versiontype year |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |