Study on Cu/ZrW₂O₈ composite layers prepared by co-electrodeposition

ABSTRACT

To obtain composite materials with a low coefficient of thermal expansion (CTE), Cu/ZrW₂O₈ composite layers were prepared by co-electrodeposition. The influence of the co-electrodeposition parameters on the particle content in the composite layers and the effects of particle content on the thermal expansion and microhardness of the layers were studied. In general, the addition of ZrW₂O₈ particles significantly enhanced the microhardness and reduced the CTE of the Cu/ZrW₂O₈ composite materials. The surface morphology changed with the current density and ZrW₂O₈ particle loading. Finally, the CTE of the Cu/ZrW₂O₈ composite materials was much lower than that of pure Cu.

KEYWORDS:

• Cu/ZrW₂O₈ composite materials
• co-electrodeposition
• microhardness
• coefficient of thermal expansion

Funding

The work described in this study was supported by the National Natural Science Foundation of China (Grant No. 51475239).