高强高韧Mg_(60)Cu_(16)Ni_(10)Nd_(14)块体非晶合金的研究  

Study on Mg_(60)Cu_(16)Ni_(10)Nd_(14) Bulk Amorphous Alloy with High Strength and Good Plasticity

作　　者：王毅坚[1] 索忠源[1] 邱克强[2] 

机构地区：[1]吉林化工学院,吉林吉林132022 [2]沈阳工业大学,辽宁沈阳110870

出　　处：《稀有金属材料与工程》2012年第1期96-99,共4页Rare Metal Materials and Engineering

基　　金：辽宁省自然科学基金(20052041);国家"973"计划(2007CB613900)

摘　　要：采用铜模铸造法制备了直径为5mm的Mg60Cu16Ni10Nd14块体非晶合金,利用扫描电镜(SEM)、透射电镜(TEM)X射线衍射(XRD)和差示扫描量热仪(DSC)研究了其组织、相结构和热稳定性。结果表明:合金为完全的非晶结构,且出现了相分离;玻璃转变温度Tg、晶化温度Tx分别为431和488K,过冷液相区△Tx为57K,表明该合金具有较大的玻璃形成能力。压缩试验表明:合金的压缩断裂强度为653MPa,断口出现的大量韧窝是合金塑性变形量达到2.5%的主要原因。Mg60Cu16Ni10Nd14 bulk amorphous alloy with a diameter of 5 mm was prepared by copper mould casting.Its microstructure,phase structure and thermal stability were investigated by scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,X-ray diffraction（XRD） and differential scanning calorimetry（DSC）.The results show that the alloy is completely composed of amorphous phase,and phase-separated regions are homogeneously distributed in the as-cast sample.The glass transition temperature Tg and the crystallization temperature Tx of the alloy are 431 and 488 K,respectively,and the temperature interval of the supercooled liquid region ？Tx is 57 K,which means the quaternary amorphous alloy has great glass forming ability.The compressive test shows that the fracture strength of 653 MPa and the plastic elongation of 2.5% are obtained.The good plasticity is because of lots of dimples on fracture surface.

关 键 词：Mg60Cu16Ni10Nd14块体非晶 非晶形成能力 相分离 塑性 

分 类 号：TG139.8[一般工业技术—材料科学与工程]