期刊
CHINA FOUNDRY
卷 12, 期 4, 页码 -出版社
FOUNDRY JOURNAL AGENCY
关键词
metallic glass; amorphous alloy; melt spinning; glass forming behaviour
资金
- National Natural Science Foundation of China [51171119]
- Natural Science Foundation of Liaoning Province [2013020084]
- Higher Education Youth Talent Scholar Fostering Project of Liaoning Province [LJQ2014015]
- Shenyang Bureau of Science and Technological Development [1091177-1-00]
The influence of the refilled gas pressure on the glass forming behaviour of one of the best ternary glass forming alloys Zr50Cu40Al10 was studied for the melt spinning process. The amorphicity of as- quenched ribbons was characterized by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The refilled chamber atmospheric pressure is crucial to the cooling rate of melt spinning. At high vacuum, at pressure less than 0.0001 atm, fully crystalline fragments are obtained. Monolithic amorphous ribbons were only obtained at a gas pressure of 0.1 atm or higher. The extended contact length between the cribbons and the copper wheel contributes to the high cooling rate of melt spinning. Higher chamber gas pressure leads to more turbulence of liquid metal beneath the nozzle; therefore, lower pressure is preferable at practical melt spinning processes once glass forming conditions are fulfilled.
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