| Autor: |
Glen H. Kirby, Stephen D. Nunn |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Proceedings of the 20th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures—A: Ceramic Engineering and Science Proceedings |
| DOI: |
10.1002/9780470314821.ch24 |
| Popis: |
Ceramic green bodies prepared by gelcasting were shown to be readily machinable using WC cutting tools. Samples of alumina and silicon nitride were examined. It was found that a gelcasting formulation which uses a high molecular weight cross-linking agent produces a green body having superior machining characteristics. Samples fabricated with a lower molecular weight cross-linker exhibited a poor machined surface finish due to chipping. Machining tests showed that using a 3.2 mm (0.125 in.) diameter cutting tool at a cutting speed of 162.5 cm/sec (64 ft./sec.) to machine a flat-bottomed groove 3.2 mm wide and 9.5 mm deep (0.125 x 0.375 in.) using three passes, feed rates ranging from 0.85 to 6.35 cm/sec (0.33 to 2.50 in./sec.) could be used without damaging the sample. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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