A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering
This study was conducted to assess and compare the crack-healing ability of conventional electrical sintered and microwave sintered Al2O3/x wt. % SiC (x = 5, 10, 15, and 20) structural ceramic composites. The crack-healing ability of both conventional electrical sintered and microwave sintered speci...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/3170697 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849409491052789760 |
|---|---|
| author | Madhan Mohankumar A. N. Shankar T. S. Karthik R. Saravanakumar Hemakesavulu Oruganti S. Venkatesa Prabhu N. Rakesh |
| author_facet | Madhan Mohankumar A. N. Shankar T. S. Karthik R. Saravanakumar Hemakesavulu Oruganti S. Venkatesa Prabhu N. Rakesh |
| author_sort | Madhan Mohankumar |
| collection | DOAJ |
| description | This study was conducted to assess and compare the crack-healing ability of conventional electrical sintered and microwave sintered Al2O3/x wt. % SiC (x = 5, 10, 15, and 20) structural ceramic composites. The crack-healing ability of both conventional electrical sintered and microwave sintered specimens was studied by introducing a crack of ∼100 µm length by Vickers’s indentation and conducting a heat treatment at 1200°C for dwell time of 1 h in air. The flexural or bending strength of sintered, cracked, and crack-healed specimens was determined by three-point bending test, and the phase variations by X-ray diffraction and SEM micrographs before and after crack-healing of both the sintering methods were studied and compared. The results show that almost all the specimens recovered their strength after crack-healing, but the strength of microwave sintered Al2O3/SiC structural ceramic composites has been shown to be better than that of conventional electrical sintered Al2O3/SiC structural ceramic composites. The microwave sintered crack-healed Al2O3/10 wt. % SiC specimen shows higher flexural strength of 794 MPa, which was 105% when compared with conventional electrical sintered Al2O3/10 wt. % SiC and crack-healed Al2O3/10 wt. % SiC specimen. It was found by X-ray diffractogram that before crack-healing, all the conventional electrical sintered samples have SiO2 phase which reduce the crack-healing ability and microwave sintered samples with 15 and 20 wt. % SiC show lesser SiO2 phase and 5 and 10 wt. % SiC samples have no SiO2 phase before crack-healing. However, after crack-healing treatment, all the samples have distinct SiO2 phase along with Al2O3 and SiC phases. Microwave sintered Al2O3/10 wt. % SiC specimen cracks were fully healed which was evident in SEM micrographs. |
| format | Article |
| id | doaj-art-7ce99072ddc14d849d0a6f60c0cf4f66 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-7ce99072ddc14d849d0a6f60c0cf4f662025-08-20T03:35:28ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/31706973170697A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical SinteringMadhan Mohankumar0A. N. Shankar1T. S. Karthik2R. Saravanakumar3Hemakesavulu Oruganti4S. Venkatesa Prabhu5N. Rakesh6Department of Mechanical Engineering, Velammal Engineering College, Anna University, Chennai, Tamil Nadu, IndiaDepartment of HSE & Civil Engineering, University of Petroleum & Energy Studies, Dehradun, IndiaDepartment of Electronics and Communication Engineering, Aditya College of Engineering and Technology, Surampalem, Andhrapradesh, IndiaDepartment of Wireless Communication, Institute of Electronics and Communication Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, IndiaDepartment of Electrical and Electronics Engineering, Annamacharya Institute of Technology & Sciences, Rajampet, Andhra Pradesh, IndiaDepartment of Chemical Engineering, College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, EthiopiaDepartment of Mechanical and Industrial Engineering, University of Technology and Applied Sciences, Nizwa, OmanThis study was conducted to assess and compare the crack-healing ability of conventional electrical sintered and microwave sintered Al2O3/x wt. % SiC (x = 5, 10, 15, and 20) structural ceramic composites. The crack-healing ability of both conventional electrical sintered and microwave sintered specimens was studied by introducing a crack of ∼100 µm length by Vickers’s indentation and conducting a heat treatment at 1200°C for dwell time of 1 h in air. The flexural or bending strength of sintered, cracked, and crack-healed specimens was determined by three-point bending test, and the phase variations by X-ray diffraction and SEM micrographs before and after crack-healing of both the sintering methods were studied and compared. The results show that almost all the specimens recovered their strength after crack-healing, but the strength of microwave sintered Al2O3/SiC structural ceramic composites has been shown to be better than that of conventional electrical sintered Al2O3/SiC structural ceramic composites. The microwave sintered crack-healed Al2O3/10 wt. % SiC specimen shows higher flexural strength of 794 MPa, which was 105% when compared with conventional electrical sintered Al2O3/10 wt. % SiC and crack-healed Al2O3/10 wt. % SiC specimen. It was found by X-ray diffractogram that before crack-healing, all the conventional electrical sintered samples have SiO2 phase which reduce the crack-healing ability and microwave sintered samples with 15 and 20 wt. % SiC show lesser SiO2 phase and 5 and 10 wt. % SiC samples have no SiO2 phase before crack-healing. However, after crack-healing treatment, all the samples have distinct SiO2 phase along with Al2O3 and SiC phases. Microwave sintered Al2O3/10 wt. % SiC specimen cracks were fully healed which was evident in SEM micrographs.http://dx.doi.org/10.1155/2021/3170697 |
| spellingShingle | Madhan Mohankumar A. N. Shankar T. S. Karthik R. Saravanakumar Hemakesavulu Oruganti S. Venkatesa Prabhu N. Rakesh A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering Advances in Materials Science and Engineering |
| title | A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering |
| title_full | A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering |
| title_fullStr | A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering |
| title_full_unstemmed | A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering |
| title_short | A Comparative Study on Crack-Healing Ability of Al2O3/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering |
| title_sort | comparative study on crack healing ability of al2o3 sic structural ceramic composites synthesized by microwave sintering and conventional electrical sintering |
| url | http://dx.doi.org/10.1155/2021/3170697 |
| work_keys_str_mv | AT madhanmohankumar acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT anshankar acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT tskarthik acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT rsaravanakumar acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT hemakesavuluoruganti acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT svenkatesaprabhu acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT nrakesh acomparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT madhanmohankumar comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT anshankar comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT tskarthik comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT rsaravanakumar comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT hemakesavuluoruganti comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT svenkatesaprabhu comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering AT nrakesh comparativestudyoncrackhealingabilityofal2o3sicstructuralceramiccompositessynthesizedbymicrowavesinteringandconventionalelectricalsintering |