High energy ball milling of the Fe-Ti system is carried out over a wide range of compositions. Milling Fe$ rm sb{50}Ti sb{50}$ and Fe$ rm sb{40}Ti sb{60}$ produces a composite material with amorphous regions and nanometer-sized crystals. Milling Fe$ rm sb{67}Ti sb{33}$ leads to a single-phase amorphous alloy which absorbs hydrogen, in sharp contrast to the intermetallic compound of the same composition. The nanocrystalline samples on their part exhibit a narrowing of the miscibility gap and a reduction of the pressure of the absorption plateau. The change in absorption properties, which is due to the interaction between the nanocystals and the amorphous phase, is analyzed using a simplified model of the elastic stress. Finally, hydrogen is absorbed much faster by nanocrystalline alloys than by conventional materials.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.40008 |
| Date | January 1995 |
| Creators | Tessier, Pascal |
| Contributors | Strom-Olsen, John O. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy (Department of Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001485624, proquestno: NN12496, Theses scanned by UMI/ProQuest. |
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