Effect of Milling on the Densification of SiC-BasedComposites from Polysilazane
High density SiC-based composites from polysilazanewere fabricated by high energy milling and hot pressing. After cross-linking at 200 °C, the polysilazane was pyrolysed at 1000 °C in N2 for 2 h to form amorphous Si-C-N-O followed by high energy milling for 1 h. Milled amorphous Si-C-N-O was sin...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2016-12-01
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| Series: | Makara Journal of Technology |
| Subjects: | |
| Online Access: | http://journal.ui.ac.id/technology/journal/article/view/3413 |
| Summary: | High density SiC-based composites from polysilazanewere fabricated by high energy milling and hot pressing. After
cross-linking at 200 °C, the polysilazane was pyrolysed at 1000 °C in N2 for 2 h to form amorphous Si-C-N-O followed
by high energy milling for 1 h. Milled amorphous Si-C-N-O was sintered in hot pressing at 1600 and 1700 °C for 1 h in
vacuum under the applied pressure of 50 MPa. Although no sintering additives were used, dense SiC-based composites were obtained with this method. Sintered density was 3.04 g/cm3, while only 2.57 g/cm3 for amorphous Si-C-N-O without milling. It is suggested that the liquid phase generated during the formation of Si2N2O facilitated the densification of the composite. |
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| ISSN: | 2355-2786 2356-4539 |