Microstructure and porosity evolution of alkali activated slag at various heating temperatures
This paper elucidated the microstructural and porosity evolution of alkali activated slag at 800 °C up to 1200 °C. The microstructural analysis obtained shows the changes in surface densification of glassy phase and nucleation of dynamical grains within the alkali activated slag when in contact with...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-11-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542032007X |
| _version_ | 1818665584524525568 |
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| author | Ikmal Hakem Aziz Mohd Mustafa Al Bakri Abdullah M.A.A. Mohd Salleh Sorachon Yoriya Jitrin Chaiprapa Catleya Rojviriya Long Yuan Li |
| author_facet | Ikmal Hakem Aziz Mohd Mustafa Al Bakri Abdullah M.A.A. Mohd Salleh Sorachon Yoriya Jitrin Chaiprapa Catleya Rojviriya Long Yuan Li |
| author_sort | Ikmal Hakem Aziz |
| collection | DOAJ |
| description | This paper elucidated the microstructural and porosity evolution of alkali activated slag at 800 °C up to 1200 °C. The microstructural analysis obtained shows the changes in surface densification of glassy phase and nucleation of dynamical grains within the alkali activated slag when in contact with high heating temperature. Using synchrotron radiation X-ray tomographic microscopy, the number of pores in alkali activated slag decreased with increasing heating temperature. The 3D pores distribution also demonstrated significant increase in the range size of ~20 μm with the appearance of isolated and intergranular pores at 1200 °C. These changes also led to the anorthite crystallisation indicated by high angle grain boundaries and preferred crystal orientation. The evolution of porosity and crystalline phase is contributed to the development of internal strain after heating at high temperature environment. |
| first_indexed | 2024-12-17T05:50:58Z |
| format | Article |
| id | doaj.art-cb128fe577734013b163c372f70e0609 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-17T05:50:58Z |
| publishDate | 2020-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-cb128fe577734013b163c372f70e06092022-12-21T22:01:10ZengElsevierJournal of Materials Research and Technology2238-78542020-11-01961589415907Microstructure and porosity evolution of alkali activated slag at various heating temperaturesIkmal Hakem Aziz0Mohd Mustafa Al Bakri Abdullah1M.A.A. Mohd Salleh2Sorachon Yoriya3Jitrin Chaiprapa4Catleya Rojviriya5Long Yuan Li6Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, 01000, Kangar, Perlis, MalaysiaCenter of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, 01000, Kangar, Perlis, Malaysia; Corresponding author.Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, 01000, Kangar, Perlis, MalaysiaNational Metal and Material Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park, Pahonyothin Rd., Khlong 1, Khlong Luang, Pathum Thani, 12120, ThailandSynchrotron Light Research Institute, Muang, Nakhon Ratchasima, 30000, ThailandSynchrotron Light Research Institute, Muang, Nakhon Ratchasima, 30000, ThailandSchool of Engineering, University of Plymouth, Plymouth, PL4 8AA, United KingdomThis paper elucidated the microstructural and porosity evolution of alkali activated slag at 800 °C up to 1200 °C. The microstructural analysis obtained shows the changes in surface densification of glassy phase and nucleation of dynamical grains within the alkali activated slag when in contact with high heating temperature. Using synchrotron radiation X-ray tomographic microscopy, the number of pores in alkali activated slag decreased with increasing heating temperature. The 3D pores distribution also demonstrated significant increase in the range size of ~20 μm with the appearance of isolated and intergranular pores at 1200 °C. These changes also led to the anorthite crystallisation indicated by high angle grain boundaries and preferred crystal orientation. The evolution of porosity and crystalline phase is contributed to the development of internal strain after heating at high temperature environment.http://www.sciencedirect.com/science/article/pii/S223878542032007XAlkali activated slagPorosityCrystallisationElectron backscatter diffraction |
| spellingShingle | Ikmal Hakem Aziz Mohd Mustafa Al Bakri Abdullah M.A.A. Mohd Salleh Sorachon Yoriya Jitrin Chaiprapa Catleya Rojviriya Long Yuan Li Microstructure and porosity evolution of alkali activated slag at various heating temperatures Journal of Materials Research and Technology Alkali activated slag Porosity Crystallisation Electron backscatter diffraction |
| title | Microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| title_full | Microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| title_fullStr | Microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| title_full_unstemmed | Microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| title_short | Microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| title_sort | microstructure and porosity evolution of alkali activated slag at various heating temperatures |
| topic | Alkali activated slag Porosity Crystallisation Electron backscatter diffraction |
| url | http://www.sciencedirect.com/science/article/pii/S223878542032007X |
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