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  • 2005-2009  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Thermo-Structural Analysis of Ceramic Vanes for Gas Turbines (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 45 (Oct. 2006), p. 1759-1764 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Advanced structural ceramics such as Hot Pressed Silicon Nitride (HPSN) and ReactionBonded Silicon Carbide (RBSC), thanks to their low density (3.1 ÷ 3.4 gr/cm3) and to their thermostructuralproperties, are interesting candidates for aerospace applications. This research investigatesthe feasibility of employing such monolithic advanced ceramics for the production of turbine vanesfor aerospace applications, by means of a finite element analysis. A parametric study is performedto analyse the influence of the coefficient of thermal expansion, the specific heat, the thermalconductivity, and the Weibull modulus on structural stability, heat transfer properties and thermomechanicalstresses under take-off and flying conditions. A nodal point that is evidenced is the highintensity of thermal stresses on the vane, both on steady state and in transient conditions. In order toreduce such stresses various simulations have been carried out varying geometrical parameters suchas the wall thickness. Several open questions are evidenced and guidelines are drawn for the designand production of ceramic vanes for gas turbines
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1759.pdf
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Ceramic Composites for Automotive Friction Devices (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Advances in science and technology Vol. 45 (Oct. 2006), p. 1394-1398 
    Details
    ISSN: 1662-0356
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Natural Sciences in General , Technology
    Notes: Advanced braking devices can represent a promising application for ceramic matrixcomposites (CMC) with functional and structural properties. If the actual advanced brakingmaterials could be at least partially replaced by CMCs, it might become the first consumer marketfor these materials. CMC containing three main phases, silicon carbide, graphite and carbon fiberswere prepared. A systematic analysis of the processing-structure-properties relationship of thecomposite is carried out. In particular, silicon carbide provides the necessary hardness, whereasgraphite is used for its lubricating properties, and carbon fibers are used as reinforcement. Thesamples, prepared using a reactive bonding technique, exhibited adequate mechanical properties,high resistance to thermal shocks and good stability after many thermal cycles. Morphological andstructural investigations have been performed to optimize the content of each component.Preliminary tribological investigations are presented
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/42/transtech_doi~10.4028%252Fwww.scientific.net%252FAST.45.1394.pdf
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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