Effect of atmosphere on pyrolysis of Nicalon

The pyrolytic behavior of Nicalon under a N2 atmosphere was investigated at temperatures from 1673 to 1973 K and was compared with that under an Ar atmosphere. The pyrolytic rate was measured by thermogravimetry, and heat-treated Nicalon was examined by XRD, SEM, AES, and tensile testing. The pyroly...

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Bibliographic Details
Published inJournal of materials science Vol. 31; no. 16; pp. 4407 - 4413
Main Authors SHIMOO, T, OKAMURA, K, HAYATSU, T
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 15.08.1996
Subjects
Applied sciences
Building materials. Ceramics. Glasses
Ceramic and carbon fibers
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Technical ceramics
Scanning electron microscopy
Pyrolysis
Silicon Carbides
Thermogravimetry
Argon
Nitrogen
Experimental study
Controlled atmosphere
X ray diffraction
Auger electron spectrometry
Comparative study
Ceramic fiber
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Summary:The pyrolytic behavior of Nicalon under a N2 atmosphere was investigated at temperatures from 1673 to 1973 K and was compared with that under an Ar atmosphere. The pyrolytic rate was measured by thermogravimetry, and heat-treated Nicalon was examined by XRD, SEM, AES, and tensile testing. The pyrolytic rate was smaller in N2 than in Ar. The nitrided case retarded the crystallization into beta-SiC and retained its high strength. The effectiveness of the nitrided case disappeared on heating in Ar. The strength was related to the size of the beta-SiC crystal in Nicalon. (Author)
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00356468