Nitridation of Ti-B-Al-Al2O3 Composite Powder
| Autor: | F. Çınar Şahin, Onuralp Yucel, Özlem Kumbasar Özdemir |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2001 |
| Předmět: |
Technology
Materials science Scanning electron microscope Chemical technology Composite number Intermetallic Mineralogy Chemicals: Manufacture use etc Thermite TP200-248 TP1-1185 Nitride Condensed Matter Physics Microanalysis Volumetric flow rate Ammonia chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials General Materials Science Physical and Theoretical Chemistry |
| Zdroj: | High Temperature Materials and Processes, Vol 20, Iss 5-6, Pp 429-435 (2001) |
| ISSN: | 2191-0324 0334-6455 |
| Popis: | The preparation of Ti-Al-B-N composite ceramic powders from Ti-Al-B composites by nitridation under an ammonia atmosphere has been studied. For obtaining the effects of process parameters such as time and temperature on nitride formation, Ti-Al-B composite powder prepared by thermite ignition was used as a starting material in this work. The reaction products were examined via X-ray diffraction (XRD) and microanalysis using an energy dispersive system attached to a scanning electron microscope (SEM). The X-ray and SEM observations indicate that the nitride formation is confirmed at temperature above 1273 K within 2 hours under a NH 3 gas flow rate of 33 l/h. Although TiN-AlN-BN composite powders were obtained at 1723 K in 6 hours under a NH 3 gas flow rate of 33 l/h, a small amount of intermetallic compound such as AlB 2 and TiB 2 also remains in the product. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|