Preparation of Porous Ceramic Based on Al2O3 as a Result of Zonal Compaction During Sintering of Powder Workpieces of Very Fine Aluminum Powder PAP-2 Combustion Products
| Autor: | A. I. Sitnikov, S. D. Shlyapin, Dimitri A. Ivanov, T. I. Borodina, G. E. Val’yano |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science 020502 materials Compaction Sintering 02 engineering and technology Intergranular corrosion 01 natural sciences 0205 materials engineering Breakage Agglomerate visual_art 0103 physical sciences Ultimate tensile strength Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material Porosity |
| Zdroj: | Refractories and Industrial Ceramics. 59:459-465 |
| ISSN: | 1573-9139 1083-4877 |
| DOI: | 10.1007/s11148-019-00254-9 |
| Popis: | Production aspects are considered for preparing porous ceramic based on α-Al2O3 using the effect of zonal compaction during powder workpiece sintering of very fine combustion products in air of flaky aluminum powder PAP-2 particles. It is shown that formation of a porous structure in sintered material proceeds by a local breakage mechanism through boundaries of aggregates with formation of pores between agglomerates, and also due to occurrence of a closed intergranular pore system. Properties of the ceramic obtained are: density 2.45 g/cm3, total porosity 39%, open porosity 30%, closed porosity 9%, the and ultimate strength in bending 50 – 60 MPa. |
| Databáze: | OpenAIRE |
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