TY - JOUR
T1 - Synergetic Enhancement of Strength and Ductility for Titanium-based Composites Reinforced with Nickel Metallized Multi-walled Carbon Nanotubes
AU - Dong, Longlong
AU - Zhang, W.
AU - Fu, Yongqing
AU - Lu, J. W.
AU - Liu, Y.
AU - Zhang, Yusheng
N1 - Funding information: This work was supported by the National Natural Science Foundation of China (No. 51901192), Key Research and Development Projects of Shaanxi Province (No. 2019GY-164, 2021GY-214), Science and Technology Project of Weiyang District of Xi’an City (No. 201857, No. 202008), Shaanxi Youth Star Program of Science and Technology (No. 2020KJXX-061), and UK Newton Mobility Grant (No. IE161019) through Royal Society and the National Natural Science Foundation of China, as well as Royal academy of Engineering UK-Research Exchange with China and India.
PY - 2021/10/30
Y1 - 2021/10/30
N2 - Poor ductility of titanium matrix composites with medium/high-strength reinforced with carbonaceous nanomaterials (eg., graphene, carbon nanotubes etc.), has seriously restricted their wide-range engineering and practical industry utility. Herein, we propose a new methodology to significantly and simultaneously enhance both ductility and tensile strength of the titanium matrix composites. We ball milled Ti-6Al-4V (TC4) powders with in-situ chemically synthetized Ni decorated multi-walled carbon nanotubes (i.e MWCNTs@Ni), and then sintered the composites powders using spark plasma sintering (SPS). We achieved both a significant balanced between superior strength and increased ductility of the composite using the MWCNTs@Ni nanopowders. The enhanced strength in composites is mainly attributed to the interfacial structures for effectively enhanced load transfer capability between MWCNTs@Ni and Ti matrix, e.g., the formation of coherent/semi-coherent interfaces among interfacial phases Ti2Ni, TiC and Ti matrix. Furthermore, we applied the dislocation theory to reveal the toughening mechanisms of MWCNTs@Ni in the MWCNTs@Ni/TC4 composites. This study provides a new methodology of fabricating metal matrix composites (reinforced with carbon based nanomaterial) with both high strength and good ductility.
AB - Poor ductility of titanium matrix composites with medium/high-strength reinforced with carbonaceous nanomaterials (eg., graphene, carbon nanotubes etc.), has seriously restricted their wide-range engineering and practical industry utility. Herein, we propose a new methodology to significantly and simultaneously enhance both ductility and tensile strength of the titanium matrix composites. We ball milled Ti-6Al-4V (TC4) powders with in-situ chemically synthetized Ni decorated multi-walled carbon nanotubes (i.e MWCNTs@Ni), and then sintered the composites powders using spark plasma sintering (SPS). We achieved both a significant balanced between superior strength and increased ductility of the composite using the MWCNTs@Ni nanopowders. The enhanced strength in composites is mainly attributed to the interfacial structures for effectively enhanced load transfer capability between MWCNTs@Ni and Ti matrix, e.g., the formation of coherent/semi-coherent interfaces among interfacial phases Ti2Ni, TiC and Ti matrix. Furthermore, we applied the dislocation theory to reveal the toughening mechanisms of MWCNTs@Ni in the MWCNTs@Ni/TC4 composites. This study provides a new methodology of fabricating metal matrix composites (reinforced with carbon based nanomaterial) with both high strength and good ductility.
KW - Ti composites
KW - Ni metallized carbon nanotubes
KW - Spark plasma sintering
KW - Strength
KW - Ductility
UR - http://www.scopus.com/inward/record.url?scp=85114032302&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2021.08.030
DO - 10.1016/j.carbon.2021.08.030
M3 - Article
SN - 0008-6223
VL - 184
SP - 583
EP - 595
JO - Carbon
JF - Carbon
ER -