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polymer infiltration and pyrolysis

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870573
EISBN: 978-1-62708-314-0
... also been studied. The polymeric precursor should produce a high char yield to obtain the desired density in as few polymer infiltration and pyrolysis cycles as possible. Polymers containing highly branched and crosslinked structures, and those with high percentages of ring structures, are good...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550569
EISBN: 978-1-62708-307-2
... melt infiltration, chemical vapor infiltration (CVI), polymer impregnation and pyrolysis, and directed metal oxidation, are used to produce these components. Radiant burner screens . SiC-SiC reverberatory screens for natural gas burners are being produced by CVI. These burners are used...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290251
EISBN: 978-1-62708-319-5
... a polycarbosilane binder. During heating, instead of burning out the polymer, heating conditions are adjusted to convert the polymer into silicon carbide by pyrolysis. What results are SiC particles bonded by SiC. First demonstrations were not fully dense because there was an uncompensated volume loss during...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... relies on the median particle size, D50, and the critical solids loading, ϕ C : (Eq 5.5) λ = D 50 1 + 1 ϕ − 1 ϕ C 1 / 3 − 1 Test data with powder-polymer mixtures show that a lubricating layer thickness of 0.07 to 0.2 μm is typical for smooth flow...