Synthesis of neodymium aluminide by aluminothermic reduction of neodymium oxide
| Autor: | Aniruddha Biswas, I.G. Sharma, D. K. Bose, G. B. Kale |
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| Rok vydání: | 1998 |
| Předmět: |
Standard enthalpy of reaction
Metals and Alloys Intermetallic Analytical chemistry Mineralogy chemistry.chemical_element Induction furnace Electron microprobe Condensed Matter Physics Neodymium chemistry Mechanics of Materials Differential thermal analysis Materials Chemistry Metallography Aluminide |
| Zdroj: | Metallurgical and Materials Transactions B. 29:309-315 |
| ISSN: | 1543-1916 1073-5615 |
| DOI: | 10.1007/s11663-998-0107-x |
| Popis: | Neodymium aluminide was synthesized from Nd2O3 under vacuum by aluminothermic reduction in an induction furnace. Although the standard free energy change associated with the reduction of Nd2O3 by Al is positive, due to the formation reaction of the intermetallic compound, it was possible to drive the reaction in the forward direction in the presence of excess Al. An attempt was also made to reduce Nd2O3 by Al in the thermit process in the presence of the Fe2O3-Al thermit mixture so as to make the reaction self-sustaining. A comparison between these two processes was made with respect to the reduction of Nd2O3 by Al. Differential thermal analysis (DTA) was used to study the reaction process. The product was characterized by x-ray diffraction (XRD), x-ray fluoroscence (XRF), electron probe microanalysis (EPMA), and optical metallography (OM). |
| Databáze: | OpenAIRE |
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