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Haute Ecole d'Ingénierie

Analyse de nanoparticules métalliques par électroérosion

Borgeaud, Samuel ; Zryd, Amédée (Dir.)

Mémoire de bachelor : Haute Ecole d'Ingénierie, 2011.

A l’aide d’un plan d’expérience, déterminer l’influence des paramètres d’usinage sur les particules produites dans un diélectrique eau et azote liquide. Imaginer un dispositif de récupération des particules intégré au bac d’usinage.

Haute Ecole d'Ingénierie

Moulage par injection de pièces poreuses en NiTi pour des applications biomédicales

Piatti, Antoine ; Bidaux, Jacques-Eric (Dir.) ; Carreño-Morelli, Efraín (Codir.)

Mémoire de bachelor : Haute Ecole d'Ingénierie, 2010.

Objectif du projet: Fabriquer des pièces poreuses en NiTi de module élastique proche de celui de l’os. La porosité doit être ouverte et la taille des pores comprise entre 100 et 500 μm. Méthodes | Expériences | Résultats: Des pièces en NiTi ont été fabriquées par moulage par injection de poudres (PIM) à partir de poudres de Ni et de TiH2. Deux géométries ont été testées : Des...

Université de Fribourg

Review: current international research into cellulose nanofibres and nanocomposites

Eichhorn, S. J. ; Dufresne, A. ; Aranguren, M. ; Marcovich, N. E. ; Capadona, J. R. ; Rowan, S. J. ; Weder, Christoph ; Thielemans, W. ; Roman, M. ; Renneckar, S. ; Gindl, W. ; Veigel, S. ; Keckes, J. ; Yano, H. ; Abe, K. ; Nogi, M. ; Nakagaito, A. N. ; Mangalam, A. ; Simonsen, J. ; Benight, A. S. ; Bismarck, A. ; Berglund, L. A. ; Peijs, T.

In: Journal of Materials Science, 2010, vol. 45, no. 1, p. 1-33

This paper provides an overview of recent progress made in the area of cellulose nanofibre-based nanocomposites. An introduction into the methods used to isolate cellulose nanofibres (nanowhiskers, nanofibrils) is given, with details of their structure. Following this, the article is split into sections dealing with processing and characterisation of cellulose nanocomposites and new developments...

Université de Fribourg

Functional polymer blends and nanocomposites

Weder, Christoph

In: Chimia, 2009, vol. 63, no. 11, p. 758–763

The broad class of (multi)functional polymers with unusual combinations of optical, electronic, mechanical and other properties is attracting significant interest, because it conceptually combines the advantages of polymers - low cost, ease of processing and a range of attractive mechanical characteristics - with the specific, tailorable properties of functional organic molecules. The caveat is...

Université de Fribourg

Antimonate opaque glaze colours from the faience manufacture of Le Bois d'Épense (19th century, Northeastern France)*

Maggetti, Marino ; Neururer, Christoph ; Rosen, J.

In: Archaeometry, 2009, vol. 51, no. 5, p. 791-807

Three types of antimony-based, opaque ceramic colours were used in the faience workshop of Le Bois d'Épense during the first decades of the 19th century; that is, yellow, tawny and green. Yellow is generated by lead antimonate crystals (Naples Yellow), which are incorporated into an uncoloured glass matrix. According to SEM–EDS measurements, these pigments contain iron. The tawny colour is the...

Université de Fribourg

Paul-Louis Cyfflé's (1724-1806) Terre de Lorraine: a technological study

Maggetti, Marino ; Rosen, J. ; Neururer, Chrisoph ; Serneels, Vincent

In: Archaeometry, 2009, p. -

Fragments of four Terre de Lorraine biscuit figurines were subjected to porosity analysis, X-ray fluorescence analysis, X-ray diffraction analysis, backscattered-electron image analysis—coupled with energy dispersive spectrometry—and electron backscatter diffraction analysis to determine the porosity, bulk, major, minor and trace element compositions, and the composition and the proportion of...

Haute Ecole d'Ingénierie

Flux growth of ZnO microcrystals and growth of doped homoepitaxial ZnO films by liquid phase epitaxy

Jossen, David ; Carreño-Morelli, Efrain (Dir.)

Mémoire de diplôme HES : Haute Ecole d'Ingénierie, 2007.

Zinc oxide is known as an outstanding material with desirable properties and a wide application range in optoelectronics, transparent electronics, etc. An increasingly important aspect is the fabrication of materials like ZnO by technologies which not only guarantee reproducibly high quality, but also facilitate one-step fabrication of the functional materials with a minimum effort in producing...