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Pregled bibliografske jedinice broj: 71662

Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing


Stubičar, Mirko; Tonejc, Antun; Radić, Nikola
Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing // Integration of Heat Treatment and Surface Engineering in the Manufacture of Engineering Components (Booklet with title: Final Programme) / Liščić, Božidar (ur.).
Zagreb: Croatian Society for Heat Treatment and Surface Engineering, 2001. str. 06-06 (poster, međunarodna recenzija, neobjavljeni rad, znanstveni)


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Naslov
Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing

Autori
Stubičar, Mirko ; Tonejc, Antun ; Radić, Nikola

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, neobjavljeni rad, znanstveni

Izvornik
Integration of Heat Treatment and Surface Engineering in the Manufacture of Engineering Components (Booklet with title: Final Programme) / Liščić, Božidar - Zagreb : Croatian Society for Heat Treatment and Surface Engineering, 2001, 06-06

Skup
8th Seminar of International Federation for Heat Treatment and Surface Engineering

Mjesto i datum
Cavtat (kraj Dubrovnika), Hrvatska, 12-14.09.2001

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Preparation of Al-W thin films by magnetron sputtering; metastable crystalline films; amorphous films; isochronal annealing; X-ray diffraction.

Sažetak
Thin films of Al-W alloys were prepared on sapphire substrates by magnetron co-sputtering. The results of X-ray diffraction analysis proved that the as-prepared samples, within a composition range Al80W20 to Al67W33, were amorphous. The increase of tungsten content in the films (Al60W40 and Al50W50 ) resulted in the appearance in a mixture of two or three metastable crystalline phases. The thermal stability of films was investigated after isochronal annealing the samples for one hour in a temperature range from 293 to 1273 K. It was revealed that there was slight increase in the microhardness during annealing up to a temperature chosen within the interval ~(773-848) K, and such annealing has a small influence on the XRD patterns. In contrast, the annealing above this temperature interval induced detectable changes in the microhardness and significant changes in X-ray diffraction patterns. The results of analysis of XRD patterns demonstrated that amorphous thin films do not disintegrate directly into the ordered equilibrium (a-W, Al4W, and Al5 W) co-existing phases, but the metastable (a-W(Al), b-W(Al), and Al(W)) intermediary phases were observed to appear in the films before the former phases were observed. Thus, for the microhardess behaviour during isochronal annealing of Al-W thin films an explanation given for the metallic glasses investigated earlier can be offered, and this explanation is based also on the results of the XRD investigation we performed. All our microhardness isochronal curves obtained for the both types of annealed samples indicate that mechanisms influencing microhardness change during annealing are similar for amorphous and crystalline states.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija



POVEZANOST RADA


Projekt / tema
119202
119495

Ustanove
Prirodoslovno-matematički fakultet, Zagreb

Profili:

Avatar Url Nikola Radić (autor)

Avatar Url Mirko Stubičar (autor)

Avatar Url Antun Tonejc (autor)

Citiraj ovu publikaciju

Stubičar, Mirko; Tonejc, Antun; Radić, Nikola
Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing // Integration of Heat Treatment and Surface Engineering in the Manufacture of Engineering Components (Booklet with title: Final Programme) / Liščić, Božidar (ur.).
Zagreb: Croatian Society for Heat Treatment and Surface Engineering, 2001. str. 06-06 (poster, međunarodna recenzija, neobjavljeni rad, znanstveni)
Stubičar, M., Tonejc, A. & Radić, N. (2001) Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing. U: Liščić, B. (ur.)Integration of Heat Treatment and Surface Engineering in the Manufacture of Engineering Components (Booklet with title: Final Programme).
@article{article, editor = {Li\v{s}\v{c}i\'{c}, B.}, year = {2001}, pages = {06-06}, keywords = {Preparation of Al-W thin films by magnetron sputtering, metastable crystalline films, amorphous films, isochronal annealing, X-ray diffraction.}, title = {Microhardness and Microstructural Changes of Al-W Thin Films during Isochronal Annealing}, keyword = {Preparation of Al-W thin films by magnetron sputtering, metastable crystalline films, amorphous films, isochronal annealing, X-ray diffraction.}, publisher = {Croatian Society for Heat Treatment and Surface Engineering}, publisherplace = {Cavtat (kraj Dubrovnika), Hrvatska} }




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