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Insight into reactions and interface between boron nitride nanotube and aluminium

journal contribution
posted on 14.11.2012, 00:00 authored by D Lahiri, V Singh, Luhua LiLuhua Li, X Tan, S Seal, Ying (Ian) ChenYing (Ian) Chen, A Agarwal
Nature and mechanism of interfacial reactions between boron nitride nanotubes (BNNTs) and aluminum matrix at high temperature (650 °C) are studied using high-resolution transmission electron microscopy (HRTEM). This study analyzes the feasibility of the use of BNNTs as reinforcement in aluminum matrix composites for structural application, for which interface plays a critical role. Thermodynamic comparison of aluminum (Al)-BNNT with analogous Al-carbon nanotube (Al-CNT) system reveals lesser amount of reaction in the former. Experimental observation also reveals thin (~7 nm) reaction-product formation at Al-BNNT interface even after 120 min of exposure at 650 °C. The spatial distribution of the reaction-product species at the interface is governed by the competitive diffusion of N, Al, and B. Morphology of the reaction products are influenced by their orientation relationship with BNNT walls. A theoretical prediction on Al-BNNT interface in macroscale composite suggests the formation of strong bond between the matrix and reinforcement phase.

History

Journal

Journal of materials research

Volume

27

Issue

21

Pagination

2760 - 2770

Publisher

Cambridge University Press

Location

Cambridge, England

ISSN

0884-2914

eISSN

2044-5326

Language

eng

Publication classification

C1 Refereed article in a scholarly journal