|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Nanocomposites V: Structure-Property Relationships in Nanostructured Materials
||M-26: Pathways for Engineering Boron Nitride Nanotube Based High-strength Aluminum Composites
||Pranjal Nautiyal, Benjamin Boesl, Arvind Agarwal
|On-Site Speaker (Planned)
High temperature stability and excellent mechanical properties of boron nitride nanotubes (BNNT) are exploited to develop lightweight and high strength Aluminum-matrix composites. Very long (100-200 μm) and fine (5-10 nm) nanotubes are used as reinforcing nanofiller for superior strengthening. Three major processing routes are adopted: spark plasma sintering (powder metallurgy), metal solidification (casting) and plasma spray (additive manufacturing). BNNTs are found to survive the extreme temperature and pressure conditions involved in these processes. Interfacial chemical reactions, and dispersion and integration of BNNTs in Aluminum are examined by electron microscopy, X-ray diffraction and energy dispersive spectroscopy. BNNT addition is found to enhance the elastic modulus, hardness and tensile strength of the composite, indicating effective stress transfer from the matrix to the nanotube. Post failure microscopy shows nanotube pull out and crack-bridging as prominent load-bearing mechanisms. These findings evidence the suitability of BNNT for developing advanced high-performance metal matrix composites.
||Planned: Supplemental Proceedings volume