Open AccessMicrostructures and properties of in-situ (ZrB2 + Al2O3)np/AA6111 composites synthesized under magnetic and ultrasonic fields
Author(s) -
Chaoyi Xia,
Yutao Zhao,
Fei Chen,
Xizhou Kai,
Ran Tao,
Zheng Fang,
Yangyang Sun
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab9663
Subject(s) - materials science , microstructure , composite material , alloy , ultrasonic sensor , ultimate tensile strength , nanoparticle , vickers hardness test , grain size , elongation , yield (engineering) , crystallite , metallurgy , nanotechnology , physics , acoustics
ZrB 2 and Al 2 O 3 nanoparticle-reinforced aluminum matrix composites were successfully prepared by in situ chemical reaction of the Al-Na 2 B 4 O 7 -K 2 ZrF 6 system with magnetic field applied in the in situ reaction and ultrasonic field introduced in solidification. The results indicated that the optimized magnetic frequency was 10 Hz, and the ultrasonic power was 1.0 kW. XRD analysis showed that ZrB 2 and Al 2 O 3 nanoparticles have been obtained. The smaller clusters were evenly distributed in the matrix. ZrB 2 and Al 2 O 3 nanoparticles were dispersed and uniformly distributed. The average size of particles and grain size of (ZrB 2 + Al 2 O 3 ) np /AA6111 composites were refined to 45 ± 10 nm and 50.4 ± 12 μ m, respectively. The maximum Vickers hardness, tensile strength, yield strength and elongation of the composites synthesized under the optimized magnetic and ultrasonic fields were 142.2 HV, 355.4 MPa, 259.4 MPa and 22.4%, which were 1.34, 1.36, 1.35 and 1.33 times higher than that of AA6111 alloy, respectively.