摘要
对La-Al-Cu-Ni合金玻璃形成能力、热力学性能和力学性能进行了研究。结果表明,La_(62)Al_(14)Cu_(14)Ni_(10)大块金属玻璃具有较高的玻璃形成能力,其临界直径可达14 mm,另外具有较宽的过冷液相区(61 K),较低的玻璃转变温度(400 K)。不同的玻璃形成能力在热力学框架内进行了讨论。La-Al-Cu-Ni合金玻璃形成能力与过冷液态区ΔTx以及参数γ关系较小,且与约化玻璃转变温度Trg关系较大。La_(62)Al_(14)Cu_(17)Ni_7、La_(62)Al_(14)Cu_(14)Ni_(10)和La_(62)Al_(14)Cu_(12)Ni_(12)合金断裂强度超过600 MPa。该合金具有好的力学性能,可作为工程材料使用。
Glass forming ability（ GFA）,thermodynamic properties and mechanical properties of La-Al-Cu-Ni bulk metallic glasses（ BMGs） were investigated. It is found that the La_（62）Al_（14）Cu_（14）Ni_（10） BMG with the critical diameter of 14 mm exhibits the higher GFA with the lower glass transition temperature of 400 K and the wider supercooled liquid region of 61 K. The GFA is discussed based on thermodynamics. The GFA of the La-Al-Cu-Ni alloys is mildly influenced by the supercooled liquid region（ ΔTx） and the glass-forming parameter（ γ）,and depends strongly on the glass transition temperature（ Trg）. In addition,the fracture strength of the La_（62）Al_（14）Cu_（17）Ni_7,La_（62）Al_（14）Cu14Ni10 and La_（62）Al_（14）Cu_（12）Ni_（12）alloys is higher than 600 MPa and can be used as engineering materials.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2016年第4期27-31,共5页
Transactions of Materials and Heat Treatment
基金
陕西理工学院博士科研启动项目(SLGKYQD2-22)
关键词
大块金属玻璃
玻璃形成能力
热力学
力学性能
bulk metallic glass
glass forming ability
thermodynamics
mechanical property
