An effective growth of hierarchical BNNTs/SiC fibers with enhanced interfacial properties

Koken D., Top A., CEBECİ F. Ç., Turgut F., Bozali Apaydın B., Ozden-Yenigun E., ...Daha Fazla

COMPOSITES SCIENCE AND TECHNOLOGY, cilt.216, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 216
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1016/j.compscitech.2021.109033
  • Dergi Adı: COMPOSITES SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Computer & Applied Sciences, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: nano-structures, Ceramic fibers, interface/interphase, Mechanical testing, BORON-NITRIDE NANOTUBES, SILICON-CARBIDE FIBERS, SHEAR-STRENGTH, SIC/SIC COMPOSITES, CARBON NANOTUBES, MECHANICAL-PROPERTIES, THERMAL-STABILITY, TENSILE-STRENGTH, MICROBOND METHOD, SIC FIBERS
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Tailoring the SiC fiber-matrix interface in micron-sized fibers is crucial to attaining enhanced mechanical properties in ceramic reinforced composites. Herein, the authors report the growth of boron nitride nanotubes (BNNT) onto SiC fibers (SiCf), creating a fuzzy fiber architecture to promote the surface area for a defined load path of fiber to the matrix and improve the mechanical properties of these structures. Successful BNNT-growth is achieved by a boron oxide chemical vapor deposition method combined with growth vapor trapping with optimum parameters of 1200 degrees C and 1 h, comparatively low temperature to those reported in the literature. The strength loss of SiCf after exposure to 1200 degrees C was attributed to high process temperature, similar to what has been observed in the literature. Hence, BNNT growth does not lead to additional strength loss on these fibers measured by a single fiber tensile test. Moreover, through this direct growth method, grown BNNTs utilize a surface-anchored BNNTs/SiCf, creating a good matrix adhesion to prevent fiber-fiber sliding and pullout and increasing the interfacial shear strength (IFSS) with epoxy. Furthermore, microbond tests show that fuzzy BNNTs/SiCf architecture increased IFSS by at least 87.8% compared to as-received SiCf.