Effects of Y on Glass Forming Ability and Corrosion Resistance of Cu-based Amorphous Alloys

Zhang Xu1; Shi Zhiqiang1; Wang Yanfang1; Li Li1; Wu Tongxia2

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Effects of Y on Glass Forming Ability and Corrosion Resistance of Cu-based Amorphous Alloys
Vol. 31, Issue 2, Pages: 167-169(2011)
Published： 2011 ，
DOI：

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[1]张旭,石志强,王彦芳,栗荔,武同霞.Y对Cu基非晶合金形成能力和腐蚀行为的影响[J].特种铸造及有色合金,2011,31(02):167-169+204.

Zhang Xu1, Shi Zhiqiang1, Wang Yanfang1, et al. Effects of Y on Glass Forming Ability and Corrosion Resistance of Cu-based Amorphous Alloys. [J]. Special Casting & Nonferrous Alloys 31(2):167-169(2011)
[1]张旭,石志强,王彦芳,栗荔,武同霞.Y对Cu基非晶合金形成能力和腐蚀行为的影响[J].特种铸造及有色合金,2011,31(02):167-169+204. DOI：

Zhang Xu1, Shi Zhiqiang1, Wang Yanfang1, et al. Effects of Y on Glass Forming Ability and Corrosion Resistance of Cu-based Amorphous Alloys. [J]. Special Casting & Nonferrous Alloys 31(2):167-169(2011) DOI：

摘要

采用铜模吸铸法制备出成分为（Cu50Zr45Al5）100-xYx（x=0

5）的合金试样。利用X射线衍射

金相显微镜

差热分析和电化学极化曲线的方法研究了Y对Cu-Zr-Al系非晶合金的结构、玻璃形成能力和腐蚀行为的影响。结果表明

适量Y的添加提高了非晶合金的玻璃形成能力和热稳定性

当Y含量为2%时合金的过冷液相区宽度为ΔTx=Tx-Tg=64K

约化玻璃转变温度Trg=Tg/T1=0.601

玻璃形成能力γ=Tx/（Tg+T1）=0.409（Tg

T1分别为非晶合金的玻璃转变温度

晶化开始温度和熔化温度）。非晶合金在3.5%的NaCl溶液中的耐蚀性随Y含量的增加而降低。

Abstract

The（Cu50Zr45Al5）100-xYx（x=0

5）alloy samples were prepared by copper mold suction casting method.The structure

glass forming ability and corrosion resistance of the samples were investigated by XRD（X-ray diffraction）

OM（optical microscope）

DSC（differential scanning calorimetry）

DTA and potentiodynamic polarization.The results reveal that proper Y addition can effectively improve the thermal stability and glass forming ability（GFA）of the Cu-Zr Al amorphous alloy.With 3% Y content

the width of super-cooled region is 64 K

and approximate glass transition temperature is 0.601

and γ is 0.409.Corrosion resistance of the amorphous alloy is decreased with increasing in Y addition in 3.5% NaCl solution.