Samiha Hakkar, S. Achache, F. Sanchette, Z. Mekhalif, N. Kamoun, A. Boumaza
{"title":"Characterization by Photoluminescence and Raman Spectroscopy of the Oxide Scales Grown on the PM2000 at High Temperatures","authors":"Samiha Hakkar, S. Achache, F. Sanchette, Z. Mekhalif, N. Kamoun, A. Boumaza","doi":"10.1142/s2251237319500035","DOIUrl":null,"url":null,"abstract":"The microstructural change of a thermal oxidation on a PM2000 superalloy was investigated after a 48 h isothermal heat-treatment. The oxides (transitions aluminas, [Formula: see text]-alumina and mixed oxides) were characterized using the Raman spectroscopy, the Photoluminescence (PL) spectroscopy, MEB observations and the X-ray diffraction for temperatures between 600°C and 1200°C. The X-ray diffraction results under conventional incidence conditions make it possible to estimate the crystallites size and the specific surfaces of the [Formula: see text]-alumina. The PL analyses at various excitation wavelengths (200[Formula: see text]nm, 234[Formula: see text]nm, 326[Formula: see text]nm and 532[Formula: see text]nm) provide important information on the existing defects (intrinsic and extrinsic) according to the oxidation temperature. The Raman spectroscopy ([Formula: see text].18[Formula: see text]nm) gives the various signatures of the various alumina generated ([Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]-Al2O3).","PeriodicalId":16406,"journal":{"name":"Journal of Molecular and Engineering Materials","volume":null,"pages":null},"PeriodicalIF":2.4000,"publicationDate":"2019-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1142/s2251237319500035","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular and Engineering Materials","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1142/s2251237319500035","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 6
Abstract
The microstructural change of a thermal oxidation on a PM2000 superalloy was investigated after a 48 h isothermal heat-treatment. The oxides (transitions aluminas, [Formula: see text]-alumina and mixed oxides) were characterized using the Raman spectroscopy, the Photoluminescence (PL) spectroscopy, MEB observations and the X-ray diffraction for temperatures between 600°C and 1200°C. The X-ray diffraction results under conventional incidence conditions make it possible to estimate the crystallites size and the specific surfaces of the [Formula: see text]-alumina. The PL analyses at various excitation wavelengths (200[Formula: see text]nm, 234[Formula: see text]nm, 326[Formula: see text]nm and 532[Formula: see text]nm) provide important information on the existing defects (intrinsic and extrinsic) according to the oxidation temperature. The Raman spectroscopy ([Formula: see text].18[Formula: see text]nm) gives the various signatures of the various alumina generated ([Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]-Al2O3).