TY - JOUR
T1 - Structural evolution of multi-walled carbon nanotubes during the consolidation of Al matrix composites
AU - Zhou, Weiwei
AU - Chen, Chao
AU - Fan, Yuchi
AU - Kikuchi, Keiko
AU - Nomura, Naoyuki
AU - Kawasaki, Akira
PY - 2019/12/15
Y1 - 2019/12/15
N2 - The crystalline integrity of multi-walled carbon nanotubes (MWCNTs) plays a critical role in determining the performance of MWCNT/Al composites. In this work, the structural evolution of MWCNTs during composite consolidation was studied via high-resolution transmission electron microscopy and Raman spectroscopy. The MWCNTs were not structurally damaged during the spark plasma sintering of MWCNT/Al mixed powders. However, two kinds of fractures, i.e., clear break and sword-in-sheath failure, were generated under severe plastic deformation of Al during hot extrusion. We concluded that the MWCNT failure, seen on the fractured composites, was caused by the consolidation process rather than the tensile tests. This work provides a better understanding of the strengthening behavior of MWCNTs, and the design of high-performance MWCNT/Al composites using suitable consolidation techniques.
AB - The crystalline integrity of multi-walled carbon nanotubes (MWCNTs) plays a critical role in determining the performance of MWCNT/Al composites. In this work, the structural evolution of MWCNTs during composite consolidation was studied via high-resolution transmission electron microscopy and Raman spectroscopy. The MWCNTs were not structurally damaged during the spark plasma sintering of MWCNT/Al mixed powders. However, two kinds of fractures, i.e., clear break and sword-in-sheath failure, were generated under severe plastic deformation of Al during hot extrusion. We concluded that the MWCNT failure, seen on the fractured composites, was caused by the consolidation process rather than the tensile tests. This work provides a better understanding of the strengthening behavior of MWCNTs, and the design of high-performance MWCNT/Al composites using suitable consolidation techniques.
KW - Al matrix composites
KW - Carbon nanotubes
KW - Load transfer
KW - Powder metallurgy
UR - http://www.scopus.com/inward/record.url?scp=85072672021&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072672021&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2019.126731
DO - 10.1016/j.matlet.2019.126731
M3 - Article
AN - SCOPUS:85072672021
SN - 0167-577X
VL - 257
JO - Materials Letters
JF - Materials Letters
M1 - 126731
ER -