Fe41Co7Cr15Mo14Y2C15B6大块非晶合金的变温晶化动力学研究

Non-Isothermal Crystallization Kinetics of Fe41Co7Cr15Mo14Y2C15B6 Bulk Amorphous Alloy

摘要:

采用差热分析法(DTA)研究了具有高玻璃形成能力的Fe41Co7Cr15Mo14Y2C15B6块体非晶合金的变温晶化动力学。由热分析曲线得到玻璃转变温度Tg、晶化起始温度Tx和晶化峰值温度Tp1、Tp2，这些特征温度具有明显的动力学效应。运用Kissinger法和Ozawa法分别计算出不同升温速率下该Fe基块体非晶合金的玻璃转变激活能Eg、晶化激活能Ex与激活能Ep1、Ep2。采用Kissinger方法和Ozawa方法解释了此大块非晶合金具有高的热稳定性的热力学机制。

Abstract:

The non-isothermal crystallization kinetics of Fe41Co7Cr15Mo14Y2C15B6 bulk amorphous alloy with high glass forming ability was studied by the differential thermal analyzer (DTA). Glass transition temperature Tg, onset crystallization temperature Tx and peak crystallization temperature Tp1 and Tp2 were obtained from DTA curves. These characteristic temperatures were of obvious dynamic effect. The glass transition activation energy Eg, crystallization activation energy Ex, and activation energy Ep1, Ep2 corresponding to characteristic temperatures Tg, Tx, Tp1, Tp2 were calculated by Kissinger and Ozawa equations, respectively. The thermodynamics mechanism of Fe41Co7Cr15Mo14Y2C15B6 bulk amorphous alloy with high thermal stability was explained by Kissinger method and Ozawa method.