在线提供 19 October 2023
Alloying seriously deteriorates the thermal conductivity of
magnesium (Mg) alloys, thus, restricts their applications in the fields
of computer, communication, and consumer products. In order to improve
the thermal conductivity of Mg alloys, adding carbon nanotube (CNT)
combined with aging treatment is proposed in this work, i.e.
fabricating the D-CNT (a kind of dispersed CNT) reinforced ZK61 matrix composite via powder metallurgy,
and conducting aging treatment to the composite. Results indicate the
as-aged ZK61/0.6 wt.% D-CNT composite achieved an excellent thermal conductivity of 166 W/(mK), exhibiting 52.3% enhancement in comparison with matrix, as well as tensile yield strength of 321 MPa, ultimate tensile strength of 354 of MPa, and elongation of 14%. The simultaneously enhanced thermal conductivity and
mechanical performance are mainly attributed to: (1) the embedded
interface of the D-CNT with matrix and (2) the coherent interface of
precipitates with matrix. It is expected the current work can provide a
clue for devising Mg matrix composites with integrated structural and
functional performances, and enlarge the current restricted applications
of Mg alloys.
