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Growth of normally-immiscible materials (NIMs), binary alloys, and metallic fibers by hyperbaric laser chemical vapor deposition
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2008 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, Vol. 91, no 3, 507-514 p.Article in journal (Refereed) Published
Abstract [en]

This work demonstrates that two or more elements of negligible solubility (and no known phase diagram) can be co-deposited in fiber form by hyperbaric-pressure laser chemical vapor deposition (HP-LCVD). For the first time, Hg-W alloys were grown as fibers from mixtures of tungsten hexafluoride, mercury vapor, and hydrogen. This new class of materials is termed normally-immiscible materials (NIMs), and includes not only immiscible materials, but also those elemental combinations that have liquid states at exclusive temperatures. This work also demonstrates that a wide variety of other binary and ternary alloys, intermetallics, and mixtures can be grown as fibers, e.g. silicon-tungsten, aluminum-silicon, boron-carbon-silicon, and titanium-carbon-nitride. In addition, pure metallic fibers of aluminum, titanium, and tungsten were deposited, demonstrating that materials of high thermal conductivity can indeed be grown in three-dimensions, provided sufficient vapor pressures are employed. A wide variety of fiber properties and microstructures resulted depending on process conditions; for example, single crystals, fine-grained alloys, and glassy metals could be deposited.

Place, publisher, year, edition, pages
2008. Vol. 91, no 3, 507-514 p.
National Category
Inorganic Chemistry
Research subject
Inorganic Chemistry
URN: urn:nbn:se:uu:diva-99974DOI: 10.1007/s00339-008-4440-3ISI: 000255089300026OAI: oai:DiVA.org:uu-99974DiVA: diva2:209095
Available from: 2009-03-23 Created: 2009-03-23 Last updated: 2009-11-11Bibliographically approved

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Inorganic Chemistry

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