Al、Si及Y多元合金化对Cr-20Nb合金高温氧化行为的影响  

Effect of Multiple Elements Al,Si and Y on High Temperature Oxidation of Cr-20Nb Alloys

作　　者：郑海忠[1] 鲁世强[1] 

机构地区：[1]南昌航空大学,江西南昌330063

出　　处：《稀有金属材料与工程》2011年第3期433-437,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50474009;51074092);航空科学基金(05G56003);博士启动金(EA200901372);江西省自然科学基金(2010GQC0154);江西省材料工程中心项目(ZX200901002)

摘　　要：针对软第二相Cr稍微降低Laves相NbCr2合金的1200℃抗氧化性,采用Al、Si及Y多元合金化来提高Cr-20Nb合金的高温抗氧化性能。结果表明,多元合金化的Cr-20Nb合金1100℃及1200℃抗氧化性均好于加入单一合金化的及纯Cr-20Nb合金,并随着Si合金元素含量增加,Cr-20Nb合金的氧化增重变小,抗氧化性变好;SEM结果表明,添加合金元素后,氧化膜与基体的粘附性得到了明显提高。To resolve the problem that ductile phase Cr decreases slightly the oxidation resistance of Laves phase NbCr2 alloys at 1200℃,multiple elements Al,Si and Y were added to Cr-20Nb alloys.The results indicate that the oxidation resistance of Cr-20Nb alloys alloyed by multi elements is higher than that of unalloyed Cr-20Nb and Cr-20Nb alloyed by single element.Moreover,the oxidation resistance of Cr-20Nb alloys increases with increasing the Si content.SEM analysis shows that the additions improve the adhesion of oxide film on the matrix.

关 键 词：Cr-20Nb合金 合金化 氧化行为 

分 类 号：TG144[一般工业技术—材料科学与工程]