| Autor: |
Hugo Ricardo Zschommler Sandim, Bruno Vieira Morante, Paulo Atsushi Suzuki |
| Jazyk: |
angličtina |
| Rok vydání: |
2005 |
| Předmět: |
|
| Zdroj: |
Materials Research, Vol 8, Iss 3, Pp 293-297 (2005) |
| Druh dokumentu: |
article |
| ISSN: |
1516-1439 |
| DOI: |
10.1590/S1516-14392005000300012 |
| Popis: |
The thermal decomposition of titanium hydride powder (delta-phase) to titanium (alpha-phase) was investigated by means of thermogravimetric analysis (TGA) and high-temperature X-ray diffraction (HTXRD) in high vacuum. The delta-to-alpha phase transformation was followed in situ by HTXRD at temperatures varying from room temperature up to 1000 °C. The transformation was also analyzed as a function of time at isothermal conditions from 450 to 650 °C. The results of TGA show that the decomposition of the titanium hydride becomes significant at about 450 °C. Above 500 °C the decomposition is completed in times shorter than 50 minutes. The apparent activation energy for hydrogen desorption was found to be 63 ± 6 kJ.mol-1. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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