关于三元Al-Be-Ce系的研究到目前为止在文献中还没报导。本文是用X射线法研究三元Al-Be-Ce系中含从0到25原子％Ce合金部分的相平衡。在Ce-Al系中〔1.2〕的富Al部分存在含Ce量不大的(小于0.001原子％Ce)Al固溶体和两个化合物:CeAl_4和CeAl_2。化合物CeAl_2是在1465℃的温度下直接由熔体形成的。它的结构是立方的,属于MgCu_2型。化合物CeAl_4按包晶反应,由液体和CeAl_2形 Research on the ternary Al-Be-Ce system has not been reported in the literature so far. In this paper, the phase equilibrium of the ternary Al-Be-Ce ternary alloy containing from 0 to 25 atom% Ce is studied by X-ray method. In the Al-rich portion of [1.2] in the Ce-Al system, an Al solid solution containing less than 0.001 atomic% Ce and two compounds CeAl 4 and CeAl 2 are present. The compound CeAl 2 is formed directly from the melt at a temperature of 1465 ° C. Its structure is cubic, belonging to MgCu_2 type. The compound CeAl_4 was peritectic, liquid and CeAl_2-shaped