SiC Coating on Porous .GAMMA.-Al2O3 Using Alternative-Suply CVI Method

Autor:	Noriyoshi Shibata, Yasutoshi Takeda, Yukio Kubo
Rok vydání:	2001
Předmět:	Materials science Hydrogen chemistry.chemical_element General Chemistry engineering.material Condensed Matter Physics Infiltration (HVAC) Nitrogen Membrane Coating chemistry Chemical vapor infiltration Materials Chemistry Ceramics and Composites engineering Composite material Porosity Selectivity
Zdroj:	Journal of the Ceramic Society of Japan. 109:305-309
ISSN:	1882-1022 0914-5400
DOI:	10.2109/jcersj.109.1268_305
Popis:	SiC membranes were prepared by chemical vapor infiltration (CVI) onto γ-Al2O3-coated porous α-Al2O3 tubes. Source gases of SiH2Cl2 and C2H2 diluted with hydrogen were alternatively supplied to the porous tube during heating at 800-900°C, and evacuated after the cycles through the porous tube. According to this process, SiC could be infiltrated into porous alumina. The SiC infiltration was successfully controlled by repeated cycles of the alternating gas supply. The volume of gas, permeated into the porous tube, decreased with increasing number of infiltration cycles. The SiC membrane showed hydrogen parmeances of 1×10-8mol·m-2·s-1·Pa-1 with selectivity of 3.36 over nitrogen at 350°C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb5657121516d56a0398fcb4d871af86 https://doi.org/10.2109/jcersj.109.1268_305 Zobrazit plný text záznamu