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Some properties of an advanced boron fiberAn advanced coreless boron fiber exhibits tensile strengths which are more than twice that of the normal CVD B/W fibers. The coreless fiber is made by the chemical removal of the tungsten boride core exposed by splitting the as-grown fiber. The easily splittable fiber is made by the chemical vapor deposition of boron on a larger than usual tungsten substrate. It is expected that the ease of splitting is related to residual stresses in these fibers. Measurements of the axial residual stresses in both the normal and the splittable fibers are presented and the results compared. Differences in these stresses are discussed in connection with the ease of splitting in the splittable fibers.
Document ID
19790007905
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Behrendt, D. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1979
Subject Category
Composite Materials
Report/Patent Number
E-9881
NASA-TM-79065
Meeting Information
Meeting: Meeting of the Am. Ceramic Soc.
Location: Merritt Island, FL
Country: United States
Start Date: January 22, 1979
End Date: January 24, 1979
Accession Number
79N16076
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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