Activating Trace Fe Impurity as Catalyst to Plant Carbon Nanotubes Within Ti-6Al-4V Powders for High-Performance Ti Meta
- PDF / 1,941,570 Bytes
- 5 Pages / 593.972 x 792 pts Page_size
- 102 Downloads / 132 Views
S.F. LI is with the State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, No. 1 Zhongguancun North 2nd St., Beijing, 100190, P.R. China and with the Dalian National Laboratory for Clean Energy, Dalian, 116023, P.R. China. Y. LIU, Q.S. ZHU, and C.Q. HU are with the State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences and with the University of Chinese Academy of Sciences, No. 19 (A) Yuquan Road, Beijing, 100049, P.R. China. Y.F. YANG is with the State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences and with the University of Chinese Academy of Sciences and also with the Dalian National Laboratory for Clean Energy. Contact e-mails: [email protected], [email protected] K. KONDOH is with the Joining and Welding Research Institution, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan. R.D.K. MISRA is with the Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W. University Avenue, El Paso, TX, 79968. C. TAN is with the Guangdong Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou 510650, P.R. China. Y. GE is with the State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences. Manuscript submitted April 11, 2019. Article published online June 20, 2019 METALLURGICAL AND MATERIALS TRANSACTIONS A
Carbon nanotubes (CNTs) are considered ideal reinforcement candidates for metallic matrices because of their super-high speciļ¬c strength and elastic modulus as well as extraordinary thermal and electrical properties.[1] However, extreme aggregation of CNTs always occurs because of strong van der Waals interactions, such that majority of their properties are unattainable.[2] Therefore, the prerequisite for maximizing these superior properties is to have a homogeneous dispersion of CNTs in the matrix. A traditional way to disperse CNTs is mechanically ball milling the powder mixture.[3] The homogeneous dispersion of CNTs is essentially unattainable, and a dissimilar and defective CNT structure inevitably appears during ball milling. As a result, the ultimate strengthening improvement is quite limited. Aiming to resolve the aggregation issue of CNTs, a pioneering work was developed by Laurent et al.,[4] who synthesized CNTs in situ in ceramic powders pre-decorated with some extra catalysts to achieve molecular-level mixing. The CNTs introduced in this way were demonstrated to be homogeneously distributed in the bulk ceramic matrix and had good interfacial bonding with the matrix, which remarkably improved the mechanical properties, e.g., the fracture toughness of the alumina was improved nearly three times compared with pure alumina with the introduction of CNTs.[5] This provided a new pathway to making high-performance CNT-reinforced composites. Subsequently, the concept of the molecular-level mixing app
Data Loading...
