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通过铜模吸铸法制备(Zr47Cu44Al9)100-xMox(x=0,1,2,3)大块非晶合金.利用X射线衍射、差热分析等,研究分析添加Mo对Zr47Cu44Al9合金非晶形成能力及热稳定性的影响.结果表明,Mo的添加量为2%时,合金具有最大的非晶形成能力,纯非晶试样的临界尺寸从4mm增大到6mm以上,8mm的样品只有微弱的衍射峰.Mo提高非晶形成能力的原因主要是抑制引起异质形核的CuZr相的析出与长大.利用Kissinger方法计算得到的其玻璃转变激活能Eg为278.57kJmol-1、晶化激活能Ex为392.46kJmol-1、晶化峰值的激活能Ep为376.97kJmol-1.与原合金相比,晶化激活能与晶化峰值激活能的数据都增大,说明Mo的添加不仅提高了原合金的非晶形成能力,同时也增强了合金的热稳定性.
(Zr47Cu44Al9) 100-xMox (x = 0, 1, 2, 3) bulk amorphous alloy was prepared by copper mold suction casting method.Analysis of the effect of Mo addition on the amorphous formation of Zr47Cu44Al9 alloy by X-ray diffraction and differential thermal analysis The results show that when the addition amount of Mo is 2%, the alloy has the largest amorphous formation capacity, the critical size of the pure amorphous sample increases from 4mm to more than 6mm, and the sample of 8mm has only weak Of the diffraction peaks.Mo improve the formation of amorphous ability mainly due to inhibition of heterogeneous nucleation of CuZr phase precipitation and growth using Kissinger method calculated glass transition activation energy Eg is 278.57kJmol-1, crystallization activation Ex can be 392.46kJmol-1, the activation energy Ep of the crystallization peak is 376.97kJmol-1. Compared with the original alloy, the data of crystallization activation energy and crystallization peak activation energy are increased, indicating that the addition of Mo not only improves The original alloy amorphous formation, but also enhance the thermal stability of the alloy.