Paper Title:
Ceramic Composites Derived from Polysiloxane/Al/Nb by AFCOP Process
  Abstract

In this work, ceramic matrix composites (CMC) were prepared by AFCOP process, using a polysiloxane network filled with metallic niobium and aluminum powders as active fillers. The liquid polysiloxane precursor was loaded with a suitable polymer/filler ratio in relation to stoichiometric Nb : C and Al : O molar ratios. Changing Al for a-Al2O3, which acted as an inert filler, non-stoichiometric conditions were obtained. The mixtures were blended, uniaxially warm pressed, and pyrolysed in flowing argon at 800, 1000 and 1200 °C. Thermogravimetry was used to follow the weight changes during the pyrolysis process. X-ray diffraction was used to identify the formation of new crystalline phases, such as Al2O3, NbC, Nb2C and Al3Nb in the composites. Sintered specimens were also characterized by SEM and EDS. The results indicated good potential for this system to obtain multiphasic composite material in the Al-Nb system at lower temperatures.

  Info
Periodical
Materials Science Forum (Volumes 498-499)
Edited by
Lucio Salgado and Francisco Ambrozio Filho
Pages
375-380
DOI
10.4028/www.scientific.net/MSF.498-499.375
Citation
M. A. Schiavon, I.V.P. Yoshida, J. C. Bressiani, W. Acchar, "Ceramic Composites Derived from Polysiloxane/Al/Nb by AFCOP Process", Materials Science Forum, Vols. 498-499, pp. 375-380, 2005
Online since
November 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: J.W. Paek, Beom Seob Kim, Deug Joong Kim
Abstract:Ceramic foams containing MoSi2 were prepared by a self-blowing process of poly-silsesquioxane with MoSi2 as filler. Ceramic foams prepared by...
129
Authors: Yugang Ma, Eun Yi Kim, Seok Ho Yoon, Chin Myung Whang
1050
Authors: Lisa M. Ehrenfried, David Farrar, David Morsley, Ruth Cameron
Abstract:Co-continuous degradable polymer-ceramic composites were produced via in-situ polymerization of (D,L-lactic)acid monomer within a porous...
407
Authors: Juan Fco Luna Martínez, E. Reyes-Melo, Virgilio González-González, A. Torres-Castro, Carlos Guerrero-Salazar, Selene Sepúlveda-Guzmán
Abstract:In this work, iron oxide nanoparticles (~5 nm) embedded in a chitosan polymer film, were synthesized. In order to obtain this nanostructured...
51
Authors: Xin Meng, Yong Feng Li, Jian Li, Yi Xing Liu
Abstract:A new composite, wood-polymer composite, was fabricated by formation of poly (methyl methacrylate) in wood cellular structure. Methyl...
971