论文部分内容阅读
木文用X射线粉末衍射法配合差热分析法,确证了金属间化合物DyNi_4的存在,发现了一种新的金属间化合物Dy_4Ni_(17),并作出了这个二元系合金相图。 此合金系中共存在着十种金属间化合物,它们是:Dy_3Ni,Dy_3Ni_2,DyNi,DyNi_2,DyNi_3,Dy_2Ni_7,DyNi_4,Dy_4Ni_(17),DyNi_5,和Dy_2Ni_(17),金属间化合物DyNi和DyNi_5,分别在1248℃和1397℃同成分熔化;金属间化合物Dy_3Ni Dy_3Ni_2,DyNi_2,DyNi_3,Dy_2Ni_7,DyNi_4,Dy_4Ni_(17)和Dy_2Ni(17)分别在762℃,928℃,1258℃,1283℃,1307℃,1336℃,1352℃和1321℃由八个包晶反应形成;存在着3lat％Ni693℃,56at％Ni1173℃和93at％Ni1279℃三个共晶反应,无论是Dy在Ni中或是Ni在Dy中都几乎不溶解。
In order to confirm the existence of DyNi_4 intermetallic compound by X-ray powder diffractometry and differential thermal analysis, a new intermetallic Dy_4Ni_ (17) was identified and the binary phase diagram of the alloy was obtained. There are ten kinds of intermetallic compounds in the alloy system, which are: Dy_3Ni, Dy_3Ni_2, DyNi, DyNi_2, DyNi_3, Dy_2Ni_7, DyNi_4, Dy_4Ni_17, DyNi_5 and Dy_2Ni_17, intermetallic compounds DyNi and DyNi_5, The intermetallic compounds Dy3Ni Dy3Ni2, DyNi2, DyNi3, Dy2Ni7, DyNi4, Dy4Ni17 and Dy2Ni17 were melted at 1248 ℃ and 1397 ℃ respectively at 762 ℃, 928 ℃, 1258 ℃, 1283 ℃, 1307 ℃, 1336 ° C, 1352 ° C and 1321 ° C are formed by eight peritectic reactions; there are three eutectic reactions of 3lat% Ni693 ° C, 56at% Ni1173 ° C and 93at% Ni1279 ° C, whether Dy is in Ni or Ni is in Dy Almost do not dissolve.