Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 754, Issue -, Pages 114-123Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.04.282
Keywords
ZrB2/AA6111 nanocomposites; In situ synthesis; Coupled magnetic and ultrasonic field; Clusters; Microstructure; Tensile properties
Categories
Funding
- Natural Science Foundation of China [U1664254, 51701085, 51174098]
- Natural Science Foundation for Young of Jiangsu Province, China [BK20160516, BK20170543]
- Postdoctoral Science Foundation of China [2016M591780]
- Special Funds for the Transformation of Scientific and Technological Achievements of Jiangsu Province, China [BA2014112, BA2015153]
- Jiangsu Postgraduates Innovating Scientific Research Project [KYCX17_1767]
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In situ ZrB2/AA6111 composites were successfully prepared from an Al-K2ZrF6-KBF4 system via an in situ melt reaction with the assistance of a coupled magnetic and ultrasonic field. The effects of the coupled magnetic and ultrasonic field on the nanoparticle distribution, morphology and tensile properties of the nanocomposites were investigated. The results indicated that with increase in the magnetic frequency and ultrasonic power to 10 Hz and 1.5 kW, respectively, the large particle clusters were broken into smaller clusters that were uniformly distributed in the matrix, the distribution of the ZrB2 nanoparticles was diffuse and homogeneous with a size decreased to 10-80 nm, and the corners of the nanoparticles clearly became obtuse. The optimal ultimate tensile strength (UTS), yield strength (YS) and elongation (El) of the composite prepared under the coupled field were 363 MPa, 240 MPa and 24.1%, respectively, corresponding to increases of 36.6%, 55.5% and 64% over the respective properties of the AA6111 alloy. The synergistic functions of the ultrasonic and magnetic fields were also discussed. The effects of the magnetic field and ultrasonic field were different. Published by Elsevier B.V.
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