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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(ZrgCo4)-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/T1=0.590.
The composition of the Zr-Al-Co bulk amorphous alloy was optimized by using the isoelectronic concentration and electron concentration lines. The electron density curves (e / a = 1.5) and (ZrgCo4) -Al And (Zr78.5Co21.5) -Al electron concentration, and the bulk alloy was prepared by the absorption casting method.The experimental results show that in the (Al50Co50) -Zr electron concentration line and (Zr9Co4) -Al electron Amorphous alloy can be formed on the concentration line, and the thermal stability and amorphous formation ability of the amorphous alloy monotonically increase with the increase of the electron concentration. Among them, (Al50Co50) -Zr and other electron concentration lines and (Zr9Co4) -Al The Zr53Al23.5Co23.5 amorphous alloy formed at the intersection of the electron concentration line has the maximum thermal stability and amorphous formation ability. The characteristic thermodynamic parameters Tg = 783 K, Tx = 849 K, Tg / Tm = 0.637, Tg / T1 = 0.590.