铜基块体非晶合金的玻璃形成能力  

Glass-forming Ability of Cu-based Bulk Amorphous Alloys

作　　者：孔见[1] 陈光[1] 

机构地区：[1]南京理工大学材料科学与工程系,南京210094

出　　处：《有色金属》2005年第2期8-10,24,共4页Nonferrous Metals

基　　金：江苏省自然科学基金资助项目(BK2001053);南京理工大学科研发展基金资助项目(AB96054);南京理工大学青年学者基金资助项目(Njust200405)。

摘　　要：用差压铸造法制备Cu47Ti34Zr11Ni8和Cu47Ti33Zr11Ni8Si1块体非晶合金,研究其热稳定性。结果表明用1%Si替换Ti后,合金的玻璃转变温度、晶化温度、过冷液相区、约化玻璃温度分别从672K,735K,63K和0.575转变为692K,753K,61K和0.592。不同于组元性质的第三类元素Si的加入,提高了玻璃转变温度Tg,进而提高了合金的玻璃形成能力。Cu_ 47Ti_ 34Zr_ 11Ni_8 and Cu_ 47Ti_ 33Zr_ 11Ni_8Si_1 bulk amorphous alloys are prepared by differential pressure casting, and the alloy thermal stability is studied. By the substitution of Si for 1%Ti, the glass transition temperature T_g, crystallization temperature T_ x1 and temperature interval of super cooled liquid region ΔT_x and reduced glass transition temperature T_ rg of the alloy are proved to be changed from 672K, 735K, 63K and 0.575 to 692K, 753K, 61K and 0.592, respectively. The glass transition temperature T_g is improved by the addition of the third kind element Si, which is different from constituting elements, then the glass-forming ability of the alloy is increased.

关 键 词：玻璃形成能力 块体非晶合金 玻璃转变温度 铜基 约化玻璃温度 过冷液相区 热稳定性 晶化温度 铸造法 Si 组元 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG139.6[金属学及工艺—合金]