Advanced Nanostructure-Controlled Functionally Graded Materials Employing Carbon Nanotubes

Mehdi Estili; Kenta Takagi; Akira Kawasaki

doi:10.4028/www.scientific.net/MSF.631-632.225

Paper Titles

Fabrication of Titanium / Biodegradable-Polymer FGM for Medical Application
p.199

Mechanical Properties-Graded Ti Alloy Implants for Orthopedic Applications
p.205

Calcium Phosphate Coating on Blast-Treated Titanium Implants by RF Magnetron Sputtering
p.211

Modelling of Processing of FGM Bioimplants
p.217

Advanced Nanostructure-Controlled Functionally Graded Materials Employing Carbon Nanotubes
p.225

Reinforcement of Alumina with Surface Modified Carbon Nanotubes
p.231

Fabrication of (Cemented Carbides/Steel) Bilayered Materials by Powder Metallurgy
p.239

Effects of Inhomogenization on Sintering Behavior of Ni/Al₂O₃ Powder Mixtures
p.245

Manufacturing of Functionally Graded Porous Products by Selective Laser Sintering
p.253

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Advanced Nanostructure-Controlled Functionally Graded Materials Employing Carbon Nanotubes

Abstract:

Capability of multiwalled carbon nanotubes (CNTs) to create in-depth gradients in properties and functionalities of conventional materials has been investigated for the first time. Functionally graded material (FGM) concept has also been employed for the first time to bridge conventional materials to their advanced nanocomposites containing a high concentration of CNTs, which is promising for unexplored yet novel structural, electronic and biomaterial applications. In this study, α-alumina ceramics considered as the most challenging case has been used as the matrix. Bulk, layered, nanostructure-controlled, CNT-based, functionally graded α-alumina ceramics have been fabricated employing a recently established powder processing technology. In-depth gradients in microstructure, grain size and hardness have been successfully achieved in alumina ceramic without cracking, delamination or warping, after homogeneous and gradual incorporation of the CNTs within the alumina ceramic matrix. The FGM approach showed promise to successfully bridge conventional ceramics to their nanocomposites containing a high concentration of CNTs.