Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction
The effects of Al2O3 nanoparticles on the phase formation, microstructure and microhardness of YBa2Cu3O7-delta superconductor prepared by citrate-nitrate auto-combustion reaction were investigated. In this study, YBa2Cu2O7-delta precursor gels containing different compositions of Al nitrate varied f...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Published: |
Maney Publishing
2014
|
| Subjects: |
| _version_ | 1796946905018662912 |
|---|---|
| author | Suan, M.S.M. Johan, M.R. |
| author_facet | Suan, M.S.M. Johan, M.R. |
| author_sort | Suan, M.S.M. |
| collection | UM |
| description | The effects of Al2O3 nanoparticles on the phase formation, microstructure and microhardness of YBa2Cu3O7-delta superconductor prepared by citrate-nitrate auto-combustion reaction were investigated. In this study, YBa2Cu2O7-delta precursor gels containing different compositions of Al nitrate varied from 0.02 to 0.10 mol were continuously heated at 250 degrees C before automatically combusted into very fine ashes. Calcination process at 900 degrees C for 1 h has transformed these ashes into sample powders. The XRD and EDX results revealed that Al2O3 nanoparticles were yielded as separate phase from YBa2Cu3O7-delta. The nanoparticles were observed homogeneously distributed in <= 0.06 mol samples while agglomerated along YBa2Cu3O7-delta grain boundaries in other samples. The 0.06 mol sample has the highest microhardness compare with the other samples. The Al2O3 nanoparticles by <= 0.06 mol compositions were effectively acted as reinforced phase which prevent further dislocation movements of YBa2Cu3O7-delta grains. As for = 0.06 compositions, agglomeration of Al2O3 nanoparticles may introduce ductility. |
| first_indexed | 2024-03-06T05:38:50Z |
| format | Article |
| id | um.eprints-15453 |
| institution | Universiti Malaya |
| last_indexed | 2024-03-06T05:38:50Z |
| publishDate | 2014 |
| publisher | Maney Publishing |
| record_format | dspace |
| spelling | um.eprints-154532015-12-30T08:44:44Z http://eprints.um.edu.my/15453/ Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction Suan, M.S.M. Johan, M.R. Q Science (General) The effects of Al2O3 nanoparticles on the phase formation, microstructure and microhardness of YBa2Cu3O7-delta superconductor prepared by citrate-nitrate auto-combustion reaction were investigated. In this study, YBa2Cu2O7-delta precursor gels containing different compositions of Al nitrate varied from 0.02 to 0.10 mol were continuously heated at 250 degrees C before automatically combusted into very fine ashes. Calcination process at 900 degrees C for 1 h has transformed these ashes into sample powders. The XRD and EDX results revealed that Al2O3 nanoparticles were yielded as separate phase from YBa2Cu3O7-delta. The nanoparticles were observed homogeneously distributed in <= 0.06 mol samples while agglomerated along YBa2Cu3O7-delta grain boundaries in other samples. The 0.06 mol sample has the highest microhardness compare with the other samples. The Al2O3 nanoparticles by <= 0.06 mol compositions were effectively acted as reinforced phase which prevent further dislocation movements of YBa2Cu3O7-delta grains. As for = 0.06 compositions, agglomeration of Al2O3 nanoparticles may introduce ductility. Maney Publishing 2014 Article PeerReviewed Suan, M.S.M. and Johan, M.R. (2014) Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction. Materials Research Innovations, 18 (S6). pp. 73-77. |
| spellingShingle | Q Science (General) Suan, M.S.M. Johan, M.R. Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title | Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title_full | Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title_fullStr | Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title_full_unstemmed | Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title_short | Microhardness of Al2O3 nanoparticles added YBa2Cu3O7-delta superconductor prepared using auto-combustion reaction |
| title_sort | microhardness of al2o3 nanoparticles added yba2cu3o7 delta superconductor prepared using auto combustion reaction |
| topic | Q Science (General) |
| work_keys_str_mv | AT suanmsm microhardnessofal2o3nanoparticlesaddedyba2cu3o7deltasuperconductorpreparedusingautocombustionreaction AT johanmr microhardnessofal2o3nanoparticlesaddedyba2cu3o7deltasuperconductorpreparedusingautocombustionreaction |