Structural and mechanical properties of a high-performance BN fibre
作者： S Bernard , F Chassagneux , M.-P Berthet , H Vincent , J Bouix
DOI: 10.1016/S0955-2219(01)00524-6
关键词: Ultimate tensile strength 、 X-ray crystallography 、 Elastic modulus 、 Scanning electron microscope 、 Mineralogy 、 Porosity 、 Composite material 、 Microstructure 、 Raman spectroscopy 、 Modulus 、 Materials science
摘要: Abstract The relationship between the structure, microtexture and mechanical properties of a high-performance polyborazine-based BN fibre has been studied in detail. Techniques such as Raman IRTF spectroscopies, X-ray diffraction, scanning transmission electron microscopies microtraction tests were used. It shown that longitudinal directly depend on microtextural structural properties. In particular, Young's modulus fibre-axis ( E =440 GPa) is controlled by structure: presents high degree alignment (002) planes compared with axis τ =0.90) value elastic attributed to strong covalent bonds basal planes. On other hand, ultimate tensile strength σ R =2000 MPa) low density d =1.85 g cm −3 ) are limited external defects porosity volume fibre.
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