Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging
The understanding of structural defects in basal-faceted sapphire ribbons was improved through X-ray imaging at a synchrotron source. The combination of phase contrast and X-ray diffraction makes it possible to visualize and characterize both gas voids and dislocations in the bulk of the ribbons gro...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/16/19/6589 |
| _version_ | 1797575536938057728 |
|---|---|
| author | Tatiana S. Argunova Victor G. Kohn Jae-Hong Lim Vladimir M. Krymov Mikhail Yu. Gutkin |
| author_facet | Tatiana S. Argunova Victor G. Kohn Jae-Hong Lim Vladimir M. Krymov Mikhail Yu. Gutkin |
| author_sort | Tatiana S. Argunova |
| collection | DOAJ |
| description | The understanding of structural defects in basal-faceted sapphire ribbons was improved through X-ray imaging at a synchrotron source. The combination of phase contrast and X-ray diffraction makes it possible to visualize and characterize both gas voids and dislocations in the bulk of the ribbons grown by the Stepanov–LaBelle technology. Dislocations were directly related to gas voids. X-ray diffraction topography was employed to investigate the distribution, configurations, and character of the dislocations. The formation of voids of irregular shapes was detected by large-area mapping with spatial resolution in the μm range. Computer simulations of the experimental phase contrast images of microvoids were performed. The sizes of the spherical microvoids were determined. The results are discussed with reference to the available data on the emission of dislocations from the voids. The evolution of the shape, size, and arrangement of the voids during growth provides clues on the formation of block structure in basal-faceted sapphire ribbons. |
| first_indexed | 2024-03-10T21:40:57Z |
| format | Article |
| id | doaj.art-9cb4285c621d41698c5bbbec91f46f1b |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T21:40:57Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9cb4285c621d41698c5bbbec91f46f1b2023-11-19T14:41:57ZengMDPI AGMaterials1996-19442023-10-011619658910.3390/ma16196589Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation ImagingTatiana S. Argunova0Victor G. Kohn1Jae-Hong Lim2Vladimir M. Krymov3Mikhail Yu. Gutkin4Ioffe Institute, Russian Academy of Sciences, Polytekhnicheskaya St. 26, 194021 St. Petersburg, RussiaNational Research Centre ‘Kurchatov Institute’, Kurchatov Sqr., 1, 123182 Moscow, RussiaPohang Accelerator Laboratory, Pohang, Gyeongbuk 37673, Republic of KoreaIoffe Institute, Russian Academy of Sciences, Polytekhnicheskaya St. 26, 194021 St. Petersburg, RussiaInstitute for Problems in Mechanical Engineering, Russian Academy of Sciences, 199178 St. Petersburg, RussiaThe understanding of structural defects in basal-faceted sapphire ribbons was improved through X-ray imaging at a synchrotron source. The combination of phase contrast and X-ray diffraction makes it possible to visualize and characterize both gas voids and dislocations in the bulk of the ribbons grown by the Stepanov–LaBelle technology. Dislocations were directly related to gas voids. X-ray diffraction topography was employed to investigate the distribution, configurations, and character of the dislocations. The formation of voids of irregular shapes was detected by large-area mapping with spatial resolution in the μm range. Computer simulations of the experimental phase contrast images of microvoids were performed. The sizes of the spherical microvoids were determined. The results are discussed with reference to the available data on the emission of dislocations from the voids. The evolution of the shape, size, and arrangement of the voids during growth provides clues on the formation of block structure in basal-faceted sapphire ribbons.https://www.mdpi.com/1996-1944/16/19/6589sapphire ribbonsgas voidsdislocationssynchrotron radiation imaging |
| spellingShingle | Tatiana S. Argunova Victor G. Kohn Jae-Hong Lim Vladimir M. Krymov Mikhail Yu. Gutkin Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging Materials sapphire ribbons gas voids dislocations synchrotron radiation imaging |
| title | Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging |
| title_full | Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging |
| title_fullStr | Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging |
| title_full_unstemmed | Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging |
| title_short | Large-Area Mapping of Voids and Dislocations in Basal-Faceted Sapphire Ribbons by Synchrotron Radiation Imaging |
| title_sort | large area mapping of voids and dislocations in basal faceted sapphire ribbons by synchrotron radiation imaging |
| topic | sapphire ribbons gas voids dislocations synchrotron radiation imaging |
| url | https://www.mdpi.com/1996-1944/16/19/6589 |
| work_keys_str_mv | AT tatianasargunova largeareamappingofvoidsanddislocationsinbasalfacetedsapphireribbonsbysynchrotronradiationimaging AT victorgkohn largeareamappingofvoidsanddislocationsinbasalfacetedsapphireribbonsbysynchrotronradiationimaging AT jaehonglim largeareamappingofvoidsanddislocationsinbasalfacetedsapphireribbonsbysynchrotronradiationimaging AT vladimirmkrymov largeareamappingofvoidsanddislocationsinbasalfacetedsapphireribbonsbysynchrotronradiationimaging AT mikhailyugutkin largeareamappingofvoidsanddislocationsinbasalfacetedsapphireribbonsbysynchrotronradiationimaging |