运用等电子浓度和变电子浓度线判据实现了Zr—Al－Co块状非晶合金的成分优化.在(Al50Co50)－Zr等电子浓度线(e/a=1.5)和(Zr9Co4)－Al及(Zr78.5Co21.5)－Al变电子浓度线上设计成分，并通过吸铸法制备块状合金。实验结果表明，在((Al50Co50)－Zr等电子浓度线和(Zr9Co4)－Al变电子浓度线上可形成块状非晶合金，且非晶合金的热稳定性与非晶形成能力随电子浓度的增大而单调递增。其中。(Al50Co50)－Zr等电子浓度线和(Zr9Co4)－Al变电子浓度线交点处形成的Zr53Al23.5Co23.5非晶合金,具有最大的热稳定性和非晶形成能力，特征热力学参数Tg=783 K，Tx=849 K，Tg/Tm=0.637，Tg/Tl=0.590。
Composition optimization for locating the composition zone with the largest glass forming ability (GFA) in the Zr-Al-Co system is attempted. The criteria that we have developed are respectively related to the conduction electron concentration, termed the e/a-constant criterion, and to the special cluster structure, termed the e/a-variant criterion. For this system, the two criteria are incarnated into the e/a-constant line with constant e/a=1.5 and the (Zr9Co4-Al and (Zr78.5Co21.5)-Al e/a--variant lines. Bulk metallic glasses (BMGs) are obtained by suction casting for alloys on the (Al50Co50-Ale/a$--constant line and Zr9Co4-Al e/a--variant line. On the (Zr9Co4-Al e/a-variant line, the thermal stability and glass forming ability of BMGs are increased with increasing e/a ratio. The Zr53Al23.5Co23.5 BMG with the largest thermal stability and GFA locates in the intersecting point of the two lines, its characteristic thermodynamic indices are Tg=783 K, Tx=849K, Tg/Tm=0.637, Tg}/Tl=0.590.
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