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The effect of oxygen on the microstructure evolution and glass formation of Zr-based bulk metallic glasses(BMGs)was studied in detail.It was found that oxygen did not form oxides or dissolve in glass matrix,but induced the precipitation ofα-Zr which has the high affinity and solubility of oxygen in the Zr-based bulk metallic glass(ZrBMG).With the precipitation ofα-Zr,the remaining melts contain much lower oxygen content and have strong glass formation,resulting in the formation ofα-Zr/BMG composite.The findings provide an important insight into the mechanism of the oxygen on glass formation,and give us a useful guideline to avoid the oxygen detrimental for designing new BMGs.
The effect of oxygen on the microstructure evolution and glass formation of Zr-based bulk metallic glasses (BMGs) was studied in detail. It was found that oxygen did not form oxides or dissolve in glass matrix, but induced the precipitation of α-Zr which has the high affinity and solubility of oxygen in the Zr-based bulk metallic glass (ZrBMG) .With the precipitation of α-Zr, the remaining melts contain much lower oxygen content and have strong glass formation, resulting in the formation of α-Zr / BMG composite . The findings provide an important insight into the mechanism of the oxygen on glass formation, and give us a useful guideline to avoid the oxygen detrimental for designing new BMGs.