Design and Fabrication of a Nanoamorphous InterfaceLayer in B 4 C/Al Composites to Improve Hot Deformabilityand Corrosion Resistance
2020
In
this paper, to improve the hot deformability and corrosion resistance,
a nanoamorphous B2O3 layer was designed and
fabricated between B4C particles and an Al matrix successfully.
The B4C@B2O3/Al composites were prepared
by a hot-pressed sintering method. By contrast, the B4C/Al
composites were synthesized using the same preparation method. The
results show that the existence of an amorphous layer can effectively
inhibit the formation of Al3BC, AlB12, and other
reaction products at the interface, compared with B4C/Al
composites. At the same time, the existence of an amorphous B2O3 layer can reduce the maximum deformation resistance
of the composites under the compression conditions of 500 °C
and 0.001 s–1, to about 76% lower than that of the
B4C/Al composites, and improve the hot deformability significantly.
Furthermore, the corrosion current density of B4C@B2O3/Al composites is 82.5% lower than that of the
B4C/Al composites. The good corrosion resistance makes
B4C@B2O3/Al composites a potential
neutron shielding material.
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