Synthesis of ternary and quaternary Cu-Ti-Nibased amorphous alloy by mechanical alloyingtechnique

• Main Authors: Mei-Fang Liao, 廖美芳
• Other Authors: Chia-Jung Hu
• Format: Others
• Language: en_US
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/02164238221554258500

碩士 === 大同大學 === 材料工程學系(所) === 94 === This study examined the amorphization behavior of Cu-Ti-Ni based alloy powders synthesized by mechanical alloying technique. The microstructural evolution during mechanical alloying of the mixed powders was investigated by both X-ray diffraction and scanning electron microscopy (SEM) . The phase stabilities of the as-milled powders were analysed by the differential scanning calorimeter. Several amorphous powders were found to exhibits a wide supercooled liquid region before crystallization. The temperature interval of the supercooled liquid region defined by the difference between Tg and Tx, ie ΔT(ΔT=Tx-Tg), is 75K for Cu40Ti40Ni20 , 83K for Cu40Ti40Ni17Sn3 ,99K for Cu40Ti40Ni16Sn4, 95K for (Cu40Ti40Ni20)96Sn4, and 82K for Cu40Ti40Ni15Si5 .As the results demonstrated, small addition of Sn and Si significantly improved the glass forming ability (GFA) of the Cu-Ti-Ni amorphous alloy.