WILSON ACCHAR
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Artigo IPEN-doc 23921 Yttria nettings by replica processing2014 - SANTOS, S.C.; YAMAGATA, C.; ACCHAR, W.; MELLO-CASTANHO, S.R.H.In the context of green economy supported and widespread by United Nations (UN), the renewable energy sources are the unique mechanism to universalize the access to energy. Face to this strategic direction of change is essential to develop efficient components for saving energy such as porous ceramics that associate light with mechanical strength. Thus, the objective of this work concerns to improve the homogeneity of porous size distribution of yttria porous ceramics by evaluating their morphology during replica processing. Samples were subject to immersion into 30vol% yttria aqueous suspensions during an interval from 1min to 120min and sintered through careful thermal conditions. Based on the results, the weight and morphology of porous structure samples were directly influenced by immersion time, whereby intervals from 30-120min showed the best final products.Resumo IPEN-doc 07591 Obtencao do composito Alsub(2)Osub(3)-NbC: resultados preliminares1998 - ACCHAR, W.; BRESSIANI, J.C.; BRESSIANI, A.H.A.; GOMES, U.U.; VIEIRA, F.A.Resumo IPEN-doc 09029 Microstructural study of SiC-platelet/silicon nitride ceramic composites1998 - ACCHAR, W.; GOMES, U.U.; BRESSIANI, J.C.; BRESSIANI, A.H.A.Resumo IPEN-doc 08174 Evolucao da microestrutura de compositos de Al2O3:NbC2000 - ROCHA, R.M.; ACCHAR, W.; MARTINELLI, A.E.; GREIL, P.; BRESSIANI, J.C.Resumo IPEN-doc 08165 On the formation of niobium carbide ceramics2000 - BRESSIANI, A.H.A.; BRESSIANI, J.C.; ACCHAR, W.; SCHEFFLER, M.; GREIL, P.Resumo IPEN-doc 19830 Yttria nettings by replica processing2013 - SANTOS, S.C.; ACCHAR, W.; YAMAGATA, C.; MELLO CASTANHO, S.R.H.Artigo IPEN-doc 07401 Sinterizacao de matrizes ceramicas reforcadas por carbetos1998 - ACCHAR, W.; GOMES, U.U.; VIEIRA, F.A.; BRESSIANI, A.H.A.; BRESSIANI, J.C.Artigo IPEN-doc 19175 Yttrium disilicate stability in aqueous medium2013 - SANTOS, S.C.; ACCHAR, W.; SILVA, A.C.; YAMAGATA, C.; MELLO CASTANHO, S.R.H.Artigo IPEN-doc 10098 Ceramic composites derived from polysiloxane/Al/Nb by AFCOP process2003 - SCHIAVON, M.A.; YOSHIDA, I.V.P.; BRESSIANI, J.C.; ACCHAR, W.Artigo IPEN-doc 14823 Properties of clay-based ceramics added with construction and demolilion waste2009 - ACCHAR, WILSON; SILVA, JULIANA E.; MELLO CASTANHO, SONIA R.H.; SEGADAES, ANA M.