以原子比为3：1的Fe粉和Si粉球磨20h后与一定量的Cu粉混合，在（1000±30）℃，20MPa的压力下热压烧结制备了致密的Fe3Si．Cu复合材料。通过浸泡腐蚀和电化学腐蚀两种方法研究加入不同质量分数Cu（5％，10％）的Fe3si-cu复合材料在0．6、0．7和0．8mol／1的NaOH溶液中的腐蚀行为。结果表明，两种材料在不同摩尔浓度的NaOH溶液中的腐蚀是一种均匀的全面腐蚀。复合材料中的Fe，si和Cu两相在NaOH溶液中组成一腐蚀电池，其中Fe3Si为阳极发生腐蚀，Cu作为阴极得到保护；Fe3Si-5％cu复合材料在NaOH溶液中的自腐蚀电位随NaOH浓度的增加而增加，自腐蚀电流在0．7mol／1的NaOH溶液中最低；Fe，Si-10％Cu在三种浓度的NaOH溶液中的自腐蚀电位相差较小，自腐蚀电流在浓度为0．6mol／1的NaOH溶液中最小，在0．7mol／l的NaOH溶液中最大。
Mixture of Fe and Si powders in a atom ratio of 3：1 was ballmilled for 2 h and them blended with Cu powder. Fe3Si-Cu composites were prepared by hotpressing sinter process under 20 MPa at i000 ℃ using the blended powders. Corrosion behavior of the as sintered F%SiCu composites containing different content of Cu （5% , 10% ） in NaOH solution were studied by immersing corrosion and electrochemical corrosion method. The results show that the two composites present uniform corrosion in NaOH solution with different concentrations. Fe3Si phase and Cu phase in the Fe3Si-Cu composite constitute a corrosion cell in NaOH solution. The Fe3Si phase is corroded as anode and the Cu phase is protected as cathode. The corrosion potential （EoorT） of Fe3Si-5% Cu in NaOH solution increases with the increasing concentration of NaOH solution. The corrosion current of Fe3Si-5% Cu is lowest in 0.7 mol/l NaOH solution. The E of Fe3Si-10% Cu shows little difference in different concentration NaOH solutions. The corrosion current of Fe3Si-10% Cu shows lowest value in 0. 6 mol/1 NaOH solution and highest value in 0. 7 mol/1 NaOH solution.
参考文献
| [1] | 孙康宁;伊衍升;李爱民.金属间化合物/陶瓷基复合材料[M].北京:机械工业出版社,2003 |
| [2] | 张永刚;韩雅芳;陈国良.金属间化合物结构材料[M].北京:国防工业出版社,2001:97-98. |
| [3] | Westbrook J H;Fleischer R L.Structural Applications of Intermetallic Compounds[M].New York:John Wiley and Sons,Inc,2000 |
| [4] | 马勤,王翠霞,薛群基,何荔,朱雪斌.Mo/2Si混合粉末的摩擦化学效应[J].摩擦学学报,2002(02):126-129. |
| [5] | 牛长胜,王艳丽,林均品,陈国良.Fe3Si基合金不同热处理工艺的软化机制[J].轧钢,2004(04):17-20. |
| [6] | 林栋梁 .高温有序金属间化合物研究的新进展[J].上海交通大学学报,1998,32(02):95-105. |
| [7] | Liu C T;Stringer J;Mundy J N et al.Order intermetallics.alloys:an assessment[J].Intermetallics,1977,5:579-596. |
| [8] | 徐强,张幸红,韩杰才,赫晓东.先进高温材料的研究现状和展望[J].固体火箭技术,2002(03):51-55. |
| [9] | Petrovic JJ;Vasudevan AK .Key developments in high temperature silicides[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1999(1/2):1-5. |
| [10] | 杨君友;吴建生;曾振鹏 等.Fe-Si合金系的机械合金化研究[J].粉末冶金技术,1997,15(03):165-167. |
| [11] | 朱心昆;林秋实;李铁力 等.机械合金化的研究及进展[J].粉末冶金技术,1999,17(04):291-296. |
| [12] | 钟太彬;林均品;陈国良 .Fe3Si合金的制备及应用研究进展[J].功能材料,1999,30(04):337-339. |
| [13] | 杨南如.机械力化学过程及效应（Ⅰ）--机械力化学效应[J].建筑材料学报,2000(01):19-26. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%