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示差扫描量热法(DSC)分析结果表明,反复重熔母合金铸锭提高了Zr_(65)Al_((7.5)~-)Ni_(10)Cu_(12.5)Ag_5金属玻璃晶化时析出的二十面体相(Ⅰ-相)的稳定性。晶化过程的Kissinger分析结果表明Ⅰ-相析出和其分解的激活能都增大。Ⅰ-相的稳定性的提高是由于金属玻璃中的短程序尺寸减小和短程序分布的均匀化,使得合金元素的重组变得更为困难。短程序尺寸的减小源于反复重熔后母合金铸锭后凝固组织的明显细化。
The results of differential scanning calorimetry (DSC) analysis showed that the remelting of master alloy ingots increased the crystallization rate of Zr65Ni_ (7.5) Ni10Cu12.5Ag5 metal glasses during crystallization The stability of the decahedral phase (Ⅰ-phase). The Kissinger analysis of the crystallization process shows that both I-phase precipitation and its decomposition activation energy increase. The increase in the stability of the I-phase is due to the reduction in the size of the short program and the homogenization of the short program distribution in the metallic glass, making the alloying of the elements more difficult to reorganize. The reduction in short program size results from the significant refinement of the solidified microstructure after repeated remelting of the master alloy ingot.