Effects of B addition on glass forming ability and thermal behavior of FePC-based bulk metallic glasses  

作　　者：Sheng-feng Guo Chen Su Jia-xiang Cui Jing Li Guan-nan Li Meng Zhang Ning Li 

机构地区：[1]Faculty of Materials and Energy,Southwest University [2]Institute of Advanced Wear & Corrosion Resistant and Functional Materials,Jinan University [3]School of Materials Science and Engineering,Huazhong University of Science and Technology

出　　处：《Journal of Iron and Steel Research International》2017年第4期442-447,共6页

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51301142and 51671162);China Postdoctoral Science Foundation(Nos.2015T80957and 2014M562279);Chongqing Research Program of Basic Research and Frontier Technology(No.cstc2015jcyjBX0107);the Fundamental Research Funds for the Central Universities(Nos.XDJK2015C064and XDJK2015C003)

摘　　要：The FePC-based bulk metallic glasses（BMGs）have been demonstrated to possess high plasticity and good soft magnetic properties.However,the relatively poor glass forming ability（GFA）and thermal stabilities limited their application in industries.The effects of microalloying with B in FePC-based BMGs on the GFA and thermal behaviors were systematically investigated.It was found that a small amount of B addition can dramatically enhance the GFA of FePC-based BMGs,which in turn leads to the critical maximum diameter up to 2 mm for full glass formation even using low cost raw materials.The underlying mechanism of the enhancement of GFA from the competing crystalline phase with amorphous phase,the average thermal expansion coefficient and dynamic viscosity were discussed in detail.The FePC-based bulk metallic glasses（BMGs）have been demonstrated to possess high plasticity and good soft magnetic properties.However,the relatively poor glass forming ability（GFA）and thermal stabilities limited their application in industries.The effects of microalloying with B in FePC-based BMGs on the GFA and thermal behaviors were systematically investigated.It was found that a small amount of B addition can dramatically enhance the GFA of FePC-based BMGs,which in turn leads to the critical maximum diameter up to 2 mm for full glass formation even using low cost raw materials.The underlying mechanism of the enhancement of GFA from the competing crystalline phase with amorphous phase,the average thermal expansion coefficient and dynamic viscosity were discussed in detail.

关 键 词：Fe-based bulk metallic glass Glass forming ability Thermal behavior Thermal expansion coefficient Dynamic viscosity B addition 

分 类 号：TG139.8[一般工业技术—材料科学与工程]