摘要
研究了Ｙ在Ａｌ－（１－５）％Ｙ，Ａｌ－８％Ｚｎ－（１－５）％Ｙ，Ａｌ－２％Ｍｇ－（１－３）％Ｙ及Ａｌ－８％Ｚｎ－２％Ｍｇ－（０－５）％Ｙ合金中的存在形态及对该合金铸态组织的影响。结果表明，在Ａｌ－Ｙ及Ａｌ－２％Ｍｇ－Ｙ合金中，Ｙ以Ａｌ３Ｙ形态存在；在Ａｌ－８％Ｚｎ－２％Ｍｇ和Ａｌ－８％Ｚｎ合金中以Ｙ１２Ａｌ３Ｚｎ金属间化合物的形态存在于晶界。在Ａｌ－８％Ｚｎ－２％Ｍｇ中，Ｙ的存在还能改变Ｚｎ和Ｍｇ在合金中的分布。
The distribution of yttrium in Al (1 5)%Y,Al 8%Zn (1 5)%Y,Al 2%Mg (1 3)%Y and Al 8%Zn 2%Mg (0 5)%Y alloys and its effect on the cast structure of these alloys were studied. The results show that in the alloys Al Y and Al 2%Mg Y,yttrium forms Al 3Y; while in the alloys Al 8%Zn 2%Mg and Al 8%Zn,yttrium takes the form of a grain boundary intermetallic compound Y 12 Al 3Zn. In the alloy Al 8%Zn 2%Mg,the existence of yttrium also changes the distribution of zinc and magnesium.
