Open AccessStudy on Mechanical and Thermal Expansion Properties of Oxide Coated Magnesium Borate Whiskers Reinforced Aluminum-based Composite
Author(s) -
Lei Zhang,
Mingming Zhang,
Zhongwei Chen
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/634/1/012097
Subject(s) - whiskers , materials science , magnesium , composite number , boron , aluminium , composite material , thermal expansion , whisker , boron oxide , oxide , thermal , aluminum oxide , metallurgy , chemistry , organic chemistry , physics , meteorology
The surface of magnesium borate whiskers was coated with oxide coatings of different components by chemical precipitation method, and magnesium borate whisker-reinforced aluminum-based composites were prepared by squeeze casting method. The compressive deformation resistance of the prefabricated whisker and the tensile and thermal expansion properties of the composite were tested. The experimental results show that the oxide coating can effectively improve the anti-deformation ability of the whisker preform, and the whisker preform prepared by MgO and Al 2 O 3 coating has better strength, and the compressive strength at room temperature reaches 0.98 MPa and 0.96 MPa. The composite material prepared by Al 2 O 3 coated whiskers has the highest room temperature tensile strength of 263 MPa, and the composite material prepared by ZnO coated whiskers has the lowest room temperature tensile strength of 224 MPa. The thermal expansion curve of the composite material shows that as the temperature increases, the thermal expansion coefficient of the composite material gradually increases, and the thermal expansion coefficient of the composite material decreases slightly after a temperature cycle.