熔体过热处理对Cu基块状非晶形成能力的影响及块状非晶的DSC研究

Effect of TRT Process on the Glass Forming Ability of Cu-Based Bulk Amorphous and DSC Study on Bulk Amorphous Alloys

在水冷铜坩埚中采用铜模吸铸法制备出直径为3.0mm的Cu50Zr42Al8合金圆棒,研究了熔体过热处理对铜模吸铸法制备块状非晶合金的影响,表明通过熔体过热处理可以提高块状非晶的形成能力,并且存在一个最佳的过热温度。采用DSC技术对铜基成分为Cu50Zr42Al8块状非晶合金进行变温晶化动力学研究,结果表明,随着升温速率的增大,该合金的热稳定性参数和约化玻璃转变温度(Trg)均增大。

The ternary alloy rods with diameters of 3.0 mm of Cu50Zr42Al8 were prepared by copper mold with suction casting method in water cooling crucible. Effects of TRT （thermal rate treatment） process on bulk amorphous alloys which be prepared by copper mold with suction casting method have been studied. It is found that the GFA （glass forming ability） of the bulk amorphous alloys can be increased by TRT process, and there is a best heating temperature. The kinetics of the non-isothermal crystallization of the Cu50Zr42Al8 by differential scanning calorimeter is studied in the mold of continuous heating. The result indicates that with the increase of the heating rate, the parameter of thermal stability and Trg increase correspondingly.