Formation of Ni₅₇Zr₂₀Ti₂₂Ge₁ amorphous powders by mechanical alloying

【作者】 林鴻明； 陳繁雄； 陳錦毅； 蔡健益； 李丕耀；

【Author】 H.M.Lin~1 F.S.Chen~1 C.Y.Chen~2 C.Y.Tsai~2 P.Y.Lee~3 (1 Department of Materials Engineering,Tatung University,Taipei 104,China) (2 Department of Materials Science and Engineering,Feng Chia University,Taichung,China) (3 Institute of Materials Engineering,Taiwan Ocean University,Keelung 202,China)

【机构】 Department of Materials Engineering,Tatung University； Department of Materials Science and Engineering,Feng Chia University； Institute of Materials Engineering,Taiwan Ocean University；

【摘要】 <正>In the current study,the amorphization behavior of mechanically alloyed Ni₅₇Zr₂₀Ti₂₂Ge₁ powder was examined in details.The conventional X-ray diffraction results confirm that the fully amorphous powders formed after 5 hours of milling. The thermal stability of the Ni₅₇Zr₂₀Ti₂₂Ge₁ amorphous powders was investigated by differential scanning calorimeter（DSC）. As the results demonstrated,the glass transition temperature（T_g） and the crystallization temperature（T_x） are 761 K and 839 K, respectively.The supercooled liquid regionΔT_x is 78 K.The appearance of wide supercooled liquid region may be mainly due to the Ge additions which cause the increasing differences in atomic size of mechanically alloyed Ni₅₇Zr₂₀Ti₂₂Ge₁ powders.更多还原

【Abstract】 In the current study,the amorphization behavior of mechanically alloyed Ni₅₇Zr₂₀Ti₂₂Ge₁ powder was examined in details.The conventional X-ray diffraction results confirm that the fully amorphous powders formed after 5 hours of milling. The thermal stability of the Ni₅₇Zr₂₀Ti₂₂Ge₁ amorphous powders was investigated by differential scanning calorimeter（DSC）. As the results demonstrated,the glass transition temperature（T_g） and the crystallization temperature（T_x） are 761 K and 839 K, respectively.The supercooled liquid regionΔT_x is 78 K.The appearance of wide supercooled liquid region may be mainly due to the Ge additions which cause the increasing differences in atomic size of mechanically alloyed Ni₅₇Zr₂₀Ti₂₂Ge₁ powders.更多还原