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以Zr Al Ni Cu(Nb ,Ti)大块非晶合金差示扫描量热分析实验为基础 ,利用Lasocka方程、Kissinger方程及Vogel Fulcher Tamman(VFT)方程对其玻璃转变的动力学性质从不同方面进行了研究 .分析结果表明 :玻璃转变表观激活能越小 ,则晶化转变激活能越大 ,表现出相反的难易程度 ,且玻璃转变表观激活能数值远较传统非晶要小 ,验证了大块非晶合金独特的结构特点及玻璃形成能力 (GFA)强的原因 .利用VFT方程对玻璃转变弛豫时间与升温速度的VFT曲线进行了拟合 ,所算得的玻璃脆性参数m均在 30左右 ,反映了Zr Al Ni Cu(Nb ,Ti)非晶合金强的脆性属性 .玻璃转变处Lasocka关系的B值、原子表观激活能及玻璃脆性参数均反映了相同的GFA大小趋势 ,从不同方面进一步揭示了非晶合金玻璃转变区间的动力学行为与GFA之间的密切联系 ,可作为判断非晶合金GFA强弱的重要依据
Based on the differential scanning calorimetry (DSC) analysis of ZrAlNiCu (Nb, Ti) bulk amorphous alloys, the kinetic properties of the glass transitions were investigated using Lasocka equation, Kissinger equation and Vogel Fulcher Tamman (VFT) The results show that the smaller the apparent activation energy of the glass transition, the larger the activation energy of the crystallization transition and the opposite ease. The apparent activation energy of the glass transition is much smaller than that of the conventional amorphous. The unique structural characteristics and glass forming ability (GFA) of bulk amorphous alloys were verified.The VFT curve was used to fit the VFT curves of glass transition relaxation time and heating rate, and the glass brittleness parameters m At about 30, the strong brittleness of ZrAlNiCu (Nb, Ti) amorphous alloy is reflected.The B value, atomic activation energy and glass brittleness parameter of Lasocka relationship at glass transition all reflect the same tendency of GFA size, From different aspects to further reveal the dynamic behavior of amorphous alloy glass transition between the GFA and the close relationship between GFA can be used as an important basis for judging the strength of GFA amorphous alloy