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研究了深冷处理对Cu40Zr44Ag8Al8非晶复合材料组织演变和力学性能的影响.运用光学金相、X射线衍射分析(XRD)、差示扫描量热分析(DSC)和显微硬度等实验手段,对Cu40Zr44Ag8Al8非晶复合材料深冷处理前后的非晶结构和晶化相进行测试分析.结果表明:深冷处理2h,Cu40Zr44Ag8Al8非晶复合材料的第二相体积份数增多.随着深冷处理时间增加到24h,第二相的体积份数和尺寸进一步增多,同时非晶复合材料的显微硬度也有一定的提高.XRD分析表明Cu40Zr44Ag8Al8非晶复合材料中形成了Cu10Zr7相和AgZr相.非晶复合材料非晶基体的玻璃转变温度Tg随着深冷处理时间的增加而提高,晶化潜热则随着深冷时间的增加而降低.Cu40Zr44Ag8Al8非晶复合材料组织结构的演变与深冷处理过程产生的内应力有关.
The effects of cryogenic treatment on the microstructure and mechanical properties of Cu40Zr44Ag8Al8 amorphous composites were studied.Using optical metallography, X-ray diffraction (XRD), differential scanning calorimetry (DSC) and microhardness test, the effect of Cu40Zr44Ag8Al8 The results show that the second phase volume fraction of Cu40Zr44Ag8Al8 amorphous composite material increases with the cryogenic treatment for 2h.When the cryogenic treatment time is increased to 24h, The volume fraction and size of the two phases further increased, while the microhardness of amorphous composites also increased to a certain extent.XRD analysis showed that the Cu10Zr7 phase and the AgZr phase were formed in the amorphous Cu40Zr44Ag8Al8 composites.The amorphous matrix composites The glass transition temperature Tg increases with the increase of cryogenic treatment time, while the latent heat of crystallization decreases with the increase of cryogenic time.The microstructure evolution of Cu40Zr44Ag8Al8 amorphous composite is related to the internal stress generated by cryogenic treatment.