锆基大块非晶合金及其晶化合金在0.5mol/L H_2SO_4中的腐蚀行为研究  

The Corrosion Resistance of Zr-based Bulk Metallic Glasses and Its Crystalline States in 0.5mol/L H_2SO_4 Solution

作　　者：何顺荣[1,2] 蔡礼平[1] 马中锋[1] 程曙霞[2] 陈树榆[3] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]中国科学技术大学热科学与能源工程系,安徽合肥230027 [3]中国科学技术大学理化中心,安徽合肥230026

出　　处：《材料开发与应用》2010年第4期16-20,共5页Development and Application of Materials

摘　　要：根据合金的DSC曲线制定了Zr60Al15Ni25、Zr52.5Al10Ni10Cu15Be12.5和Zr65Al10Ni10Cu15等锆基大块非晶合金的等温退火工艺,获得了与非晶态合金具有相同成分的晶化合金。通过研究非晶态合金和晶化合金在0.5mol/L H2SO4中的极化曲线,结合扫描电镜(SEM)和能量散射X射线谱(EDS)分析,发现,在0.5mol/LH2SO4中非晶态合金和晶化合金都具有非常优异的耐腐蚀性能,但非晶合金的耐腐蚀性能要比晶化合金稍好。这主要是因为晶态合金的结构中不存在晶界、位错等缺陷,同时非晶态合金中的组元具有很高的活性,使合金更快地进入钝态。Crystalline alloys were obtained by isothermal annealing on the basis of the DSC of Zr60Al15Ni25、Zr52.5Al10Ni10Cu15Be12.5 and Zr65Al10Ni10Cu15 bulk metallic glasses.The analysis of polarization curves of BMGs and its crystalline states,combining SEM and EDS observation,SEM and EDS indicated that in 0.5mol/L H2SO4,both the BMGs and their crystalline alloys have a very good corrosion resistance.Compared with crystalline alloys,the BMGs have a better performance,it is due to the lack of grain boundaries,dislocations and other defects,and the higher active elements in the BMGs,the faster the alloys to passive state.

关 键 词：大块非晶 晶化 耐腐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]