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Characteristics of reaction-bonded porous silicon nitride honeycomb for DPF substrate

โœ Scribed by Naomichi Miyakawa; Hironori Sato; Hiroshi Maeno; Hideo Takahashi


Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
983 KB
Volume
24
Category
Article
ISSN
0389-4304

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โœฆ Synopsis


Silicon nitride (Si 3 N 4 ) is a good candidate for a DPF substrate due to its excellent mechanical and thermal properties. A new process for producing porous silicon nitride is established and fundamental characteristics of fabricated silicon nitride honeycomb is evaluated, including mechanical properties and chemical stability against CeO 2 ash as well as pressure drop and soot regeneration behavior.


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โœ J Desmaison; N Roels; P Belair ๐Ÿ“‚ Article ๐Ÿ“… 1989 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 688 KB

## Chemical vapour deposition of Si3N 4 by pyrolysis (1200-1275ยฐC) of tetramethylsilane-ammonia-hydrogen mixtures (N:Si = 10) was used to protect reaction-bonded silicon nitride substrates against internal oxidation at 1000-1350 ยฐC. The results reveal the existence of a critical thickness (6 gm)