Ceramic coated rigid rod polymer fibers

Journal Article · Wed Jul 01 00:00:00 EDT 1992 · SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (United States)

OSTI ID:7142808

McGarry, F J; Moalli, J E ^[1]

---

1. Massachusetts Inst. of Tech., Cambridge (United States)

Previous work has shown a linear increase in fiber axial compressive strength with the thickness of a high modulus ceramic surface coating: an 8000 Angstrom thick coating approximately doubles the U.C.S. of an experimental Poly-Paraphenylene Benzobisoxazole (PBO) fiber. A rule of mixtures explanation for this effect appears not valid. More probable is constraint against compressive buckling of the fibrillar structure provided by the coating. Either tensile loading or temperature excursions can crack the ceramic coating, circumferentially or axially. If well adhered, the cracked coating still improves the axial compressive strength. The crack gaps are smaller than the length of the buckling fibril elements, and narrower than their diameter.

• OSTI ID: 7142808
• Journal Information: SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (United States), Journal Name: SAMPE Quarterly (Society of Aerospace Material and Process Engineers); (United States) Vol. 23:4; ISSN 0036-0821; ISSN SAMQA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
AZOLES
BUCKLING
CERAMICS
COATINGS
COMPOSITE MATERIALS
COMPRESSION STRENGTH
CRACKS
DATA
DIMENSIONS
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
FIBERS
HETEROCYCLIC COMPOUNDS
INFORMATION
MATERIALS
MEASURING METHODS
MECHANICAL PROPERTIES
MICROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERS
SCANNING ELECTRON MICROSCOPY
THICKNESS
ULTIMATE STRENGTH