In order to develop the cerium-containing aluminum alloy material

the Al-Cu-Ce cast aluminum alloy with low cerium content and high cerium content was prepared by squeeze casting process.The effects of Ce and Cu content on the microstructure and mechanical properties of Al-Cu-Ce cast aluminum alloys were investigated.It is found that with the increase of Ce content in the low cerium-containing Al-Cu-Ce aluminum alloy

the tensile properties at ambient temperature and high temperature are decreased

while the casting performance was improved.Ce forms eutectic Al

8

Cu

4

Ce phases with Cu

and the quantity of Al

2

Cu phases is decreased with the increase of the solidus temperature.In the high cerium-containing Al-Cu-Ce aluminum alloy

Ce forms eutectic Al

8

Cu

4

Ce phases and primary Al

8

Cu

4

Ce phases with Cu.The primary Al

8

Cu

4

Ce phases are segregated due to high density.When the content of Cu and Ce is 14%and 5%

the tensile properties of the alloy at ambient temperature and high temperature present desirable

where the tensile strength and elongation reach 368MPa

3.0%at ambient temperature

while 78MPa

19%at 350℃

respectively.