%0 Journal Article
%T Si3N4/SiC nanocomposite powder from a preceramic polymeric network based on poly(methylsilane) as the SiC precursor
%A Gozzi Maur¨ªcio F.
%A Radovanovic Eduardo
%A Yoshida I. Val¨¦ria P.
%J Materials Research
%D 2001
%I ABM, ABC, ABPol, SBCC, SBCr, SBMM, SBPMat
%X Si3N4/SiC nanocomposite powders were obtained from a preceramic polymeric network based on poly(methylsilane) as the in situ quasi-stoichiometric SiC source. These powders were constituted of nanosized SiC particles homogeneously distributed in the Si3N4 particulate matrix. beta-SiC whiskers were grown at 1400 ¡ãC in the pores of the matrix. At 1600 ¡ãC, the alpha -> beta Si3N4 phase transition took place, but no elemental silicon from Si3N4 decomposition was detected, evidencing the protective effect of the SiC phase.
%K composite powders
%K silicon nitride
%K silicon carbide
%U http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392001000100004