TY - JOUR
T1 - Graphene nanoplatelets (GNPs)-templated synthesis of oriented TiB and the inspiration for tailoring three-dimensional (3D) interface structure in GNPs/Ti matrix composites
AU - Liu, Liang
AU - Li, Yunkai
AU - Zhang, Hongmei
AU - Cheng, Xingwang
AU - Mu, Xiaonan
AU - Yi, Jianhong
N1 - Publisher Copyright:
© 2021
PY - 2021/11
Y1 - 2021/11
N2 - Inspired by cocklebur's design principle, an innovative three-dimensional (3D) interface design was proposed to strengthen the interface bonding of graphene nanoplatelets reinforced Ti matrix composites (GNPs/TiMCs). To elucidate the growth mechanisms of in-situ TiB array with oriented assignment configuration, the novel pressureless spark plasma sintering (PL-SPS) followed by heat treatment (HT) were performed on the TiB2@GNPs/Ti powders. It was found that TiB nanocrystals epitaxially grown at GNPs wrinkle sites with typical orientation relationship of TiB (101)//GNPs (200), as determined by the nanobeam diffraction mode of TEM. Moreover, the special symbiosis structure between in-situ TiC and TiB was also observed in the growth densification stage, which was beneficial for the TiC-TiB bonding. Finally, the heteroepitaxial mechanism of TiB has inspired the 3D interface configuration in bulk GNPs/Ti, and simultaneously enhanced strength and ductility were achieved as compared to the conventional GNPs/Ti composites.
AB - Inspired by cocklebur's design principle, an innovative three-dimensional (3D) interface design was proposed to strengthen the interface bonding of graphene nanoplatelets reinforced Ti matrix composites (GNPs/TiMCs). To elucidate the growth mechanisms of in-situ TiB array with oriented assignment configuration, the novel pressureless spark plasma sintering (PL-SPS) followed by heat treatment (HT) were performed on the TiB2@GNPs/Ti powders. It was found that TiB nanocrystals epitaxially grown at GNPs wrinkle sites with typical orientation relationship of TiB (101)//GNPs (200), as determined by the nanobeam diffraction mode of TEM. Moreover, the special symbiosis structure between in-situ TiC and TiB was also observed in the growth densification stage, which was beneficial for the TiC-TiB bonding. Finally, the heteroepitaxial mechanism of TiB has inspired the 3D interface configuration in bulk GNPs/Ti, and simultaneously enhanced strength and ductility were achieved as compared to the conventional GNPs/Ti composites.
KW - 3D interface configuration
KW - Graphene nanoplatelets
KW - Heteroepitaxial mechanism
KW - Ti matrix composites
KW - TiB array
UR - http://www.scopus.com/inward/record.url?scp=85115130601&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2021.111447
DO - 10.1016/j.matchar.2021.111447
M3 - Article
AN - SCOPUS:85115130601
SN - 1044-5803
VL - 181
JO - Materials Characterization
JF - Materials Characterization
M1 - 111447
ER -