Cu-Zr-Al-Ti块体非晶合金的制备及腐蚀行为研究.pdf

Cu—Zr-AI—Ti块体非晶舍金的制备及腐蚀行为研究／陈鼎等 Cu-Zr-AI-Ti块体非晶合金的制备及腐蚀行为研究。 陈 鼎，董建峰，程英亮，马国芝 (湖南大学材料科学与工程学院，长沙410082) 摘要 制备出新型Cu,sZ“sALTi块体非晶合金。利用x射线衍射仪和差示扫描量热仪对其非晶态进行表 征．采用电化学方法和扫描电子显缀镜研究了非晶舍金在3．5％NaCl溶液中的电化学行为。结果表明，C地sZr,s— A14T-样品为完全非晶，玻璃转变温度L、晶化温度L和过冷液相区△L都有所降低，断裂强度提高了约ll％。 Cu4sZn6AkTi的腐蚀电流密度降低了1个数量级，电化学反应电阻R。大大增加。分析表明，Ti通过抑制阴极过程 从而降低了非晶舍金的腐蚀速度，其杌理可能是Ti的加入降低了活性阴极的面积或增加了氧的离子化过电位， 关键词 Cu-Zr-AI—Ti块体非晶合金微合会化压缩断裂强度电化学耐腐蚀饥理 中图分类号：TGl39．8 文献标识码：A andCorrosionBehaviorofCo-Zr-AI-TiBulk Synthesis AmorphousAlloy CHEN Guozhi Ding，DONGJianfeng，CHENGYingliang，MA of 410082) (CollegeMaterials＆Engineering，HurtanUniversity，Changsha AbstraclThenew bulk was structureandther- Cu46Z“6ALTk amorphous synthesized．Tbe alloy successfully InaleMraeteristieswere XRDandDSCThecorrosionresistanceandcorrosionmechanismoftheamor— analyzedby in3．5％NaClsolutionwerestudied andSEM．T11eresultsshowthatthe is phousalloy byeleetrochermstry sample d正arereduced，andtheulttmate fracture is about completelyamorphous．乃，正and compressionstrengthimproved corrosion ofthe reducedoneorderof 11％．The currert[densityCth8Zh6AkThamorphousalloy by magnitude，trails— ferreaction increased thattheTi theeathodic resistance(R)is show has conderably．Theanalysis suppressed process ofthecorrosion。itsmechanismrelatedtOthe oftheactivecathodicareaortheincrP朗,seofth