Zr-Al-Ni-Cu glass forming alloys with low fragility parameters  

具有低脆性参数的Zr-Al-Ni-Cu玻璃形成合金(英文)

作　　者：安伟科[1] 熊翔[2] 刘咏[2] 蔡安辉[1,2] 周果君[1] 罗云[1] 李铁林[1] 李小松[1] 

机构地区：[1]湖南理工学院机械工程学院,岳阳414006 [2]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《Transactions of Nonferrous Metals Society of China》2013年第11期3312-3317,共6页中国有色金属学报（英文版）

基　　金：Project(50874045)supported by the National Natural Science Foundation of China;Projects(200902472,20080431021)supported by the China Postdoctoral Science Foundation;Project(10A044)supported by the Research Foundation of Education Bureau of Hunan Province of China

摘　　要：Zr-Al-Ni-Cu bulk metallic glasses （BMGs） were developed and their fragility parameters （m） were calculated by Arrhenius and Vogel-Fulcher-Tammann （VFT） equations. The results show that the m values of the Zr-Al-Ni-Cu BMGs derived by Arrhenius equation are in agreement with the corresponding m values derived by VFT equation. These Zr-Al-Ni-Cu BMGs characterize in low m values. The low m values for these BMGs would be due to their network microstructures. In addition, the m values of Zr-Al-Cu-Ni BMGs could be obtained by regulating Zr content. The composition of Zr-Al-Cu-Ni BMGs with the lowest m value would be near 54%Zr （mole fraction） because the m value about 13 of Zr 54 Al 13 Cu 18 Ni 15 BMG is the lowest among these Zr-Al-Ni-Cu BMGs developed.采用铜模铸造法制备出一系列Zr-Al-Ni-Cu块体非晶合金,其脆性参数值分别采用Arrhenius和Vogel-Fulcher-Tammann(VFT)方法进行计算。结果表明,这些非晶合金具有低的脆性参数值,其原因可能与网络状的微观结构有关。另外,Zr-Al-Ni-Cu合金的脆性参数值可以通过Zr含量进行调整,当Zr含量接近54%(摩尔分数)时,Zr-Al-Ni-Cu合金,即Zr54Al13Cu18Ni15合金的脆性参数值最小,约为13。

关 键 词：Zr-Al-Ni-Cu alloy metallic glass FRAGILITY 

分 类 号：TG139.8[一般工业技术—材料科学与工程]