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通过熔体快淬方法获得Ｐｒ（Ｆｅ１ － ｘＣｏｘ）２ 合金条带，经过Ｘ 射线衍射、差示扫描量热计和磁性测量对其结构、磁性和热稳定性进行了研究．发现当Ｃｏ 的含量ｘ 大于０－２ 时才可能获得Ｐｒ（Ｆｅ ，Ｃｏ）２ 立方Ｌａｖｅｓ 相化合物．对Ｐｒ（Ｆｅ０ ．６Ｃｏ０ ．４）２ 合金，在快淬速度为３０ ｍ／ｓ 时，条带由Ｐｒ２（Ｆｅ，Ｃｏ）１７ ，Ｐｒ（Ｆｅ，Ｃｏ）２ 和富稀土相组成；在速度为４０ ｍ／ｓ 时，获得了几乎单相的Ｐｒ（Ｆｅ０ ．６Ｃｏ０．４）２ 化合物，其居里温度为３０５ ℃；在速度为４５ ｍ／ｓ 时，除了Ｐｒ（Ｆｅ０ ．６Ｃｏ０ ．４）２ 化合物外，还存在少量的非晶相．Ｐｒ（Ｆｅ０．６Ｃｏ０．４）２ 化合物在７７０ ℃以上发生分解．用４０ ｍ／ｓ 快淬纳米晶粉胶粘磁体有大的磁致伸缩系数（λ∥－ λ⊥＝ １４０ ×１０ － ６） 和高的硬磁性能（ｉＨｃ＝ ３９８ ｋＡ／ｍ） ．
Pr (Fe1 - xCox) 2 alloy strips were obtained by melt quenching method. The structure, magnetic properties and thermal stability of the samples were investigated by X - ray diffraction, differential scanning calorimetry and magnetic measurements. It is found that Pr (Fe, Co) 2 cubic Laves phase compounds are obtained when the content of Co is more than 0-2. For Pr (Fe0.6Co0.4) 2 alloy, the bands consist of Pr2 (Fe, Co) 17, Pr (Fe, Co) 2 and rare earth rich phase at the quenching velocity of 30 m / At 40 m / s, almost single-phase Pr (Fe0.6Co0.4) 2 was obtained with a Curie temperature of 305 ℃. At a velocity of 45 m / s, Compounds, there are still a small amount of amorphous phase. The Pr (Fe 0.6 Co 0.4) 2 compound decomposes above 770 ° C. The magnetostriction coefficient (λ∥-λ⊥ = 140 × 10 -6) and the high hard magnetic property (iHc = 398 kA / m) were obtained with 40 m / s quenched nanocrystalline powder bonded magnets.