| Cu-Zr-Al-Ti块体非晶合金的制备及腐蚀行为研究 |
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| 引用本文： | 陈鼎,董建峰,程英亮,马国芝. Cu-Zr-Al-Ti块体非晶合金的制备及腐蚀行为研究[J]. 材料导报, 2012, 26(10): 1-4. DOI: 10.3969/j.issn.1005-023X.2012.10.001 |
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| 作者姓名： | 陈鼎 董建峰 程英亮 马国芝 |
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| 作者单位： | 1.湖南大学材料科学与工程学院,长沙,410082;2.湖南大学材料科学与工程学院,长沙,410082;3.湖南大学材料科学与工程学院,长沙,410082;4.湖南大学材料科学与工程学院,长沙,410082 |
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| 基金项目： | 教育部新世纪优秀人才资助计划(NCET-10-0360);国家自然科学基金(51071066) |
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| 摘 要： | 制备出新型Cu46 Zr46 Al4 Ti4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微镜研究了非晶合金在3.5％ NaCl溶液中的电化学行为.结果表明,Cu46Zr46-Al4 Ti4样品为完全非晶,玻璃转变温度Tg、晶化温度Tx和过冷液相区△Tx都有所降低,断裂强度提高了约11％.Cu46 Zr46 Al4 Ti4的腐蚀电流密度降低了1个数量级,电化学反应电阻R1大大增加.分析表明,Ti通过抑制阴极过程从而降低了非晶合金的腐蚀速度,其机理可能是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.
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| 关 键 词： | Cu-Zr-Al-Ti块体非晶合金 微合金化 压缩断裂强度 电化学 耐腐蚀机理 |
Synthesis and Corrosion Behavior of Cu-Zr-Al-Ti Bulk Amorphous Alloy |
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| CHEN Ding , DONG Jianfeng , CHENG Yingliang , MA Guozhi. Synthesis and Corrosion Behavior of Cu-Zr-Al-Ti Bulk Amorphous Alloy[J]. Materials Review, 2012, 26(10): 1-4. DOI: 10.3969/j.issn.1005-023X.2012.10.001 |
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| Authors: | CHEN Ding DONG Jianfeng CHENG Yingliang MA Guozhi |
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| Affiliation: | (College of Materials & Engineering,Hunan University,Changsha 410082) |
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| Abstract: | The new Cu46Zr46Al4Ti4 bulk amorphous alloy was successfully synthesized.The structure and thermal characteristics were analyzed by XRD and DSC.The corrosion resistance and corrosion mechanism of the amorphous alloy in 3.5%NaCl solution were studied by electrochemistry and SEM.The results show that the sample is completely amorphous.Tg,Tx and ΔTx are reduced,and the ultimate compression fracture strength is improved about 11%.The corrosion current density of the Cu46Zr46Al4Ti4 amorphous alloy reduced by one order of magnitude,transfer reaction resistance(Rt) is increased conderably.The analysis show that the Ti has suppressed the cathodic process of the corrosion,its mechanism maybe related to the reducing of the active cathodic area or the increase of the overpotential of the ionization of oxygen. |
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| Keywords: | Cu-Zr-Al-Ti bulk metallic glass micro-alloying compressive fracture strength electrochemistry mechanism of corrosion resistance |
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