The crystallization behaviour of a-Pd_(80)Si_(20) in the high temperature internal friction peak region is systematically studied by DSC and X-ray diffraction techniques.
Stability of nanocrystalline Ni-P ribbons was investigated by DSC and internal friction technique.The nanocrystalline Ni-P ribbons seem to be unstable within range of 518 to 887 K owing to obvious exothermal phenomeno...Stability of nanocrystalline Ni-P ribbons was investigated by DSC and internal friction technique.The nanocrystalline Ni-P ribbons seem to be unstable within range of 518 to 887 K owing to obvious exothermal phenomenon,decrement on internal friction values and grain coarsening.展开更多
The correlation between the internal friction behaviour of Zr55 Al10 Ni5 Cu30 BMG samples and their quenching temperatures was investigated. It was found that, below the glass transition temperature, the activation en...The correlation between the internal friction behaviour of Zr55 Al10 Ni5 Cu30 BMG samples and their quenching temperatures was investigated. It was found that, below the glass transition temperature, the activation energy decreased with increasing quenching temperature, but in the surpercooled liquid region the activation energy tended to be enhanced with a further increase in the quenching temperature. Besides, there were both anelastic and viscoelastic relaxation for the amorphous alloys. The anelastic behaviour would change into viscoelastic relaxation easily for the samples prepared at higher temperature.展开更多
文摘The crystallization behaviour of a-Pd_(80)Si_(20) in the high temperature internal friction peak region is systematically studied by DSC and X-ray diffraction techniques.
文摘Stability of nanocrystalline Ni-P ribbons was investigated by DSC and internal friction technique.The nanocrystalline Ni-P ribbons seem to be unstable within range of 518 to 887 K owing to obvious exothermal phenomenon,decrement on internal friction values and grain coarsening.
基金Funded by the National Natural Science Foundation of China(No.50971053)the National Natural Science Foundation of Jiangsu Province(No.BK20160279)
文摘The correlation between the internal friction behaviour of Zr55 Al10 Ni5 Cu30 BMG samples and their quenching temperatures was investigated. It was found that, below the glass transition temperature, the activation energy decreased with increasing quenching temperature, but in the surpercooled liquid region the activation energy tended to be enhanced with a further increase in the quenching temperature. Besides, there were both anelastic and viscoelastic relaxation for the amorphous alloys. The anelastic behaviour would change into viscoelastic relaxation easily for the samples prepared at higher temperature.
