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采用单辊真空薄带技术和真空吸铸法分别制备了相同成分的金属玻璃薄带和块体金属玻璃。通过示差扫描热分析(DSC)、X射线衍射(XRD)、高分辨透射电子显微镜(HRTEM)和纳米力学探针(Nano Indenter)等技术研究了冷却速度对金属玻璃的组织结构、热稳定性及力学性能的影响。结果表明:快速冷却得到的金属玻璃薄带和相同成分以较慢的冷却速度制备的块体金属玻璃相比,短程有序结构(SRO)的晶体结构相同,但数量较少,且自由体积含量相对较多;组织结构的差异导致金属玻璃薄带比块体金属玻璃有着更高的热稳定性、屈服强度,弹性模量和硬度。
Single-roll vacuum ribbon technology and vacuum suction casting method were used to prepare the same composition of the metal glass ribbon and bulk metal glass. The effects of cooling rate on microstructure, thermal stability and thermal stability of metallic glass were investigated by DSC, XRD, HRTEM and Nano Indenter. Effect of mechanical properties. The results show that the structure of short-range ordered structure (SRO) is the same, but the number is smaller than that of bulk metallic glass with the same composition and slower cooling rate. The free volume content Relatively speaking, the differences in the microstructures lead to higher thermal stability, yield strength, modulus of elasticity and hardness of metallic glass ribbons than bulk metallic glasses.