Microstructural Characterization of Carbon Nanotubes (CNTs)-Reinforced Nickel Matrix Nanocomposites

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Sónia Simões (Author) FEUP; Íris Carneiro (Author) Other; Filomena Viana (Author) FEUP; Marcos A. L. Reis (Author) Other; Manuel F. Vieira (Author) FEUP

Journal

Title: Microscopy and Microanalysis

Vol. 25 No. 1

Pages: 180-186

ISSN: 1431-9276

Publisher: Cambridge University Press

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 9 Citations

Other information

Authenticus ID: P-00P-N9G

DOI: 10.1017/s1431927618015064

Abstract (EN): This research focuses on the microstructural characterization of nickel matrix composites reinforced by carbon nanotubes (CNTs). The nanocomposites were produced by a conventional powder metallurgy process and the dispersion of CNTs and mixture with nickel powders was performed in a single step by ultrasonication. Microstructural characterization of Ni-CNT nanocomposites was performed by scanning and transmission electron microscopy, electron backscattered diffraction, high-resolution transmission electron microscopy, selected area electron diffraction, and fast Fourier transform analyses. This characterization revealed CNTs embedded in the nickel grains and mainly presented as clusters at the grain boundaries. CNTs hinder recrystallization during sintering, and dislocation cells and subgrains form as a result of the recovery process.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7