Zr-Al-Ni-Fe块体非晶合金的成分设计与优化

Composition Design and Optimization of Zr-Al-Ni-Fe Bulk Amorphous Alloys

摘要:

以等电子浓度和等原子尺寸为判据,以Zr-Al-Ni-Fe合金系为研究体系,设计并制备了7种电子浓度和平均原子尺寸相等但成分不同的系列块体合金.XRD结果表明,只有靠近Zr-Al-Ni三元系的4个合金得到块体非晶;DSC和DTA结果表明,这4个合金中的最佳成分,即具有最高玻璃形成能力和最好热稳定性的合金是Zr60 7Al15.5Ni15.5Fe8.3,其特征热力学参数Tg=710 K,Tx=770 K,△Tx=60 K,Tg/Tm=0.607,Tg/Tl=0.552.

Abstract:

Zr-Al-Ni-Fe alloy series with different compositions were designed according to the criteria of constant electron concentration and atomic size. XRD results indicate that only the four alloys near the Zr-Al-Ni ternary system formed the bulk metallic glass. It is revealed by DSC and DTA curves that the best composition forming glass is Zr60.7Al15.5Ni15.5Fe8.3 with the thermodynamic characteristic parameters of Tg=710 K, Tx=770 K, ?Tx=60 K, Tg/Tm=0.607, and Tg/Tl=0.552, respectively.