结合XRD、TEM、SEM、OM等表面分析技术,研究机械合金化Ni-20Cr合金在1000℃空气中的循环氧化行为,并与熔炼合金进行比较.结果表明:200 h循环氧化后,机械合金化Ni-20Cr合金表面生成Cr2O3氧化膜,且剥落轻微;而熔炼Ni-20Cr合金表面生成由NiO和NiCr2O4组成的氧化膜,且剥落严重,其单位面积失重明显大于机械合金化Ni-20Cr合金.在实验条件下,机械合金化Ni-20Cr合金较熔炼Ni-20Cr合金具有更好地抗循环氧化性能.一方面,晶粒细化促进保护性Cr2O3膜的生成;另一方面,晶粒细化使氧化膜中的热应力减小并可通过扩散蠕变来释放,使氧化膜的粘附性明显提高.
参考文献
[1] | E. N'dah;M. P. Hierro;K. Borrero .Study of the Cyclic Oxidation Resistance of Superalloy IN-625: Lifetime Predicted by COSP-Modelling Program[J].Oxidation of Metals,2007(1/2):9-21. |
[2] | 楼翰一,陈国锋.Ni-Cr-Al纳米晶合金在1000℃的高温氧化行为[J].腐蚀科学与防护技术,2003(03):147-150. |
[3] | CHEN Guo-feng,LOU Han-yi.Oxide formation on sputtered Ni-3Cr-10Al nanocrystalline coati ngFoundation item: Project 59671060 supported by the National Natural Science Foundation o f China[J].中国有色金属学会会刊,2000(03):397. |
[4] | LI Yuan-shi,NIU Yan,FU Guang-yan,WU Wei-tao,F.Gesmundo.Effect of grain size reduction on high temperature oxidation ofbinary two-phase alloys[J].中国有色金属学会会刊(英文版),2001(05):644-648. |
[5] | FU Guang-yan,NIU Yan,WU Wei-tao,GUAN Heng-rong.Oxidation of two-phase Cu-Cr alloys with different microstructures[J].中国有色金属学会会刊(英文版),2001(03):333-336. |
[6] | Wang Fuhui .[J].Oxidation of Metals,1997,48:215. |
[7] | Z. Han;L. Lu;H. W. Zhang .Comparison of the Oxidation Behavior of Nanocrystalline and Coarse-Grain Copper[J].Oxidation of Metals,2005(5/6):261-275. |
[8] | Liu Z;Gao W;Dahm K et al.[J].Acta Materialia,1998,46:1691. |
[9] | Liu Z;Gao W;Dahm K et al.[J].Scripta Materialia,1997,37:1551. |
[10] | Wang F .[J].Oxidation of Metals,1997,47:247. |
[11] | Bastow B D;Wood G C;Whittle D P .[J].Oxidation of Metals,1981,16:1. |
[12] | Wang Ge;Gleeson B;Douglass D L .[J].Oxidation of Metals,1991,35:333. |
[13] | Hart E W .[J].Oxidation of Metals,1957,5:597. |
[14] | Chiang K T;Mieier G H;Petitt F S;Newcomb S B,Little J A eds.Microscopy of Oxidation(Ⅲ)[M].London:Institute of Metals,1997:453. |
[15] | 王福会 .[J].材料研究学报,1998,12(01):83. |
[16] | 楼翰一.高温合金纳米晶涂层的发展[J].航空材料学报,2003(z1):220-226. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%