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Influence of thread construction on strength of ceramic sewing threadsThe effects of two thread construction variables, yarn twist and polymeric sizing, on break strength were obtained for a silica thread and two types of aluminoborosilicate (ABS) threads at temperatures ranging from 23 C to 1200 C. It was shown that increasing the degree of twist for the silica thread produced an optimum twist level until all the yarn finish was removed. The break strength of both ABS threads was inversely proportional to the degree of twist caused by increased filament breakage with increasing twist that was controlled by the gradual removal of the polymeric processing aids. At elevated temperatures, above 950 C, strength loss was observed for both ABS threads because of the presence of a glass phase that softens and causes fiber deformation. This was not observed for the silica thread at similar test temperatures because of the higher viscosity of the pure silica glass phase.
Document ID
19870062100
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sawko, Paul M.
(NASA Ames Research Center Moffett Field, CA, United States)
Tran, Huy Kim
(San Jose State University CA, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1987
Publication Information
Publication: SAMPE Quarterly
Volume: 18
ISSN: 0036-0821
Subject Category
Nonmetallic Materials
Accession Number
87A49374
Distribution Limits
Public
Copyright
Other

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