Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions
Pressure assisted casting of advanced ceramics is an emerging preparation technique as it permits using a colloidal slips in shaping under pressure. Application of pressure provides flexibility in forming of complex shapes in combination with high homogeneity, superior green density, strength and hi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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University of Novi Sad
2022-06-01
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| Series: | Processing and Application of Ceramics |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312202160R.pdf |
| _version_ | 1828437592847155200 |
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| author | Raju Pittala Biswas Papiya Khanra Asit Kumar Rao Yabaluri Srinivasa Johnson Roy |
| author_facet | Raju Pittala Biswas Papiya Khanra Asit Kumar Rao Yabaluri Srinivasa Johnson Roy |
| author_sort | Raju Pittala |
| collection | DOAJ |
| description | Pressure assisted casting of advanced ceramics is an emerging preparation technique as it permits using a colloidal slips in shaping under pressure. Application of pressure provides flexibility in forming of complex shapes in combination with high homogeneity, superior green density, strength and high productivity. Current study compares conventional slip casting (CSC), pressure slip casting (PSC) and cold isostatic pressing (CIP) used for preparation of alumina green bodies. Since particle size is a limitation in PSC process due to the defined pore size of the mould, the same starting alumina powder obtained by mixing of powders with two different average particle size (7 μm and 1.43 μm) in the proportion of 65:35 was employed in all three processes. Green densities of 65%TD at 35 bar in case of PSC and 66%TD at 1200 bar after CIP were obtained; however, density of the CSC samples was only 50%TD. Flexural strength and fractographic studies were carried out and correlated with the respective processes. The samples were also sintered at 1600 °C to evaluate their sinterability. |
| first_indexed | 2024-12-10T19:48:22Z |
| format | Article |
| id | doaj.art-86328a0410244e11a0f02b0f27c530ac |
| institution | Directory Open Access Journal |
| issn | 1820-6131 2406-1034 |
| language | English |
| last_indexed | 2024-12-10T19:48:22Z |
| publishDate | 2022-06-01 |
| publisher | University of Novi Sad |
| record_format | Article |
| series | Processing and Application of Ceramics |
| spelling | doaj.art-86328a0410244e11a0f02b0f27c530ac2022-12-22T01:35:50ZengUniversity of Novi SadProcessing and Application of Ceramics1820-61312406-10342022-06-0116216016610.2298/PAC2202160RInvestigations on colloidal and dry formed alumina parts under pressure and pressure-less conditionsRaju Pittala0Biswas Papiya1Khanra Asit Kumar2Rao Yabaluri Srinivasa3Johnson Roy4International Advanced Research Centre for Powder Metallurgy and New materials (ARCI), Hyderabad, India + Metallurgical and Materials Engineering Department, National Institute of Technology, Warangal, IndiaInternational Advanced Research Centre for Powder Metallurgy and New materials (ARCI), Hyderabad, IndiaMetallurgical and Materials Engineering Department, National Institute of Technology, Warangal, IndiaInternational Advanced Research Centre for Powder Metallurgy and New materials (ARCI), Hyderabad, IndiaInternational Advanced Research Centre for Powder Metallurgy and New materials (ARCI), Hyderabad, IndiaPressure assisted casting of advanced ceramics is an emerging preparation technique as it permits using a colloidal slips in shaping under pressure. Application of pressure provides flexibility in forming of complex shapes in combination with high homogeneity, superior green density, strength and high productivity. Current study compares conventional slip casting (CSC), pressure slip casting (PSC) and cold isostatic pressing (CIP) used for preparation of alumina green bodies. Since particle size is a limitation in PSC process due to the defined pore size of the mould, the same starting alumina powder obtained by mixing of powders with two different average particle size (7 μm and 1.43 μm) in the proportion of 65:35 was employed in all three processes. Green densities of 65%TD at 35 bar in case of PSC and 66%TD at 1200 bar after CIP were obtained; however, density of the CSC samples was only 50%TD. Flexural strength and fractographic studies were carried out and correlated with the respective processes. The samples were also sintered at 1600 °C to evaluate their sinterability.http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312202160R.pdfaluminapressure slip castingcold isostatic pressingmechanical propertiesmicrostructure |
| spellingShingle | Raju Pittala Biswas Papiya Khanra Asit Kumar Rao Yabaluri Srinivasa Johnson Roy Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions Processing and Application of Ceramics alumina pressure slip casting cold isostatic pressing mechanical properties microstructure |
| title | Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions |
| title_full | Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions |
| title_fullStr | Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions |
| title_full_unstemmed | Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions |
| title_short | Investigations on colloidal and dry formed alumina parts under pressure and pressure-less conditions |
| title_sort | investigations on colloidal and dry formed alumina parts under pressure and pressure less conditions |
| topic | alumina pressure slip casting cold isostatic pressing mechanical properties microstructure |
| url | http://www.doiserbia.nb.rs/img/doi/1820-6131/2022/1820-61312202160R.pdf |
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