A Study on the Amorphization of Immiscible System by Mechanical Alloying

• Main Authors: Tzeng-Rong Chen, 陳增榮
• Other Authors: Pee-Yew Lee
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/20564066464265184880

碩士 === 國立海洋大學 === 船舶機械工程學系 === 82 === Amorphization of immiscible system by mechanical alloying of pure elemental powders in the Cu-Ta and Cu-V binary system is carried out by different high energy ball mills. The following results were obtained : (1)Amorphization Cu-Ta alloy powders can be prepared at compo- sitions Cu20Ta80 and Cu30Ta70 by ball milling the mixture of pure Cu and Ta powders with a shaker ball mill. The amorphization can be expanded by using a planetary ball mill in the composition range Cu10Ta90 to Cu40 Ta60. (2)Amorphous Cu-V alloy powders can be synthesized in the compo- sition range Cu30V70 to Cu50V50 by ball milling the mixtures of and V powder either with a shaker ball mill or with a planetary ball mill. (3)The temperature and activation energy for crystallization of amorphous Cu-Ta powders with same composition are different when prepared under different mechanical alloying condition. (4)The product of crystalization for Cu20Ta80 amorphous powders a non-equilibrium Ta super- saturated solid solution.