添加Cr对Cu_(50)Zr_(42)Al_8合金非晶形成能力、热稳定性及耐腐蚀性能的影响  

Influnce of Cr Addition on the Glass-forming Ability Thermal Stability and Corrosion Resistance of Cu_(50)Zr_(42)Al_8 Alloy

作　　者：寇生中[1] 赵吉鹏[1] 兰烨峰[1] 雷继军[1] 高忙忙[1] 岳武[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室

出　　处：《铸造技术》2008年第5期630-633,共4页Foundry Technology

摘　　要：在水冷铜坩埚中采用铜模吸铸法制备了直径为3mm的(Cu50Zr42Al8)100-x(Cr)x(x=0,1,2,3,4)合金圆棒。采用X射线衍射(XRD)和差分扫描量热(DSC)分别对合金的结构和非晶形成能力进行了研究。结果表明,Cu50Zr42Al8和(Cu50Zr42Al8)99(Cr)1为完全非晶合金,(Cu50Zr42Al8)99(Cr)1具有最高的过冷液相区和最大的热稳定性。通过对非晶合金(Cu50Zr42Al8)99(Cr)1和Cu50Zr42Al8在3.5%NaCl溶液中的腐蚀行为的研究表明,含微量Cr的Cu基块状非晶合金比不含Cr的具有更好的耐腐蚀性能。The （Cu50 Zr42 Al8 ）100-x （Cr）x （x = 0,1,2,3,4） alloy rods with a diameter of 3.0 mm were prepared by copper mold suction casting method in water cooling crucible. The structure and glassforming ability of the alloys were analyzed by X-ray diffraction （XRD） and differential thermal analysis（DSC） respectively. It is shown that both （Cu50 Zr42 Al8）99 （Cr）1 and Cu50 Zr42 Al8 are fully metallic glasses, the （Cu50 Zr42 Al8 ）99 （Cr） 1 has the best thermal stability and the largest undercooling region △Tx of 68 K. The corrosion behaviors of （Cu50Zr42Al8）99 （Cr）2 and Cu50Zr42Al8 in 3.5% NaCl solution show that the bulk.copper matrix amorphous alloys with Or addition have better corrosion resistance than these alloys without Or addition.

关 键 词：大块非晶 非晶形成能力 热稳定性 耐腐蚀性 

分 类 号：TG139.8[一般工业技术—材料科学与工程]