为探讨晶粒尺寸变化对三元复相合金氧化行为的影响,采用机械合金化制备了纳米晶三元Cu-20Ni-20Cr合金,并对比研究了该合金与同成分的铸态合金在700℃～800℃,0.1 MPa纯氧气中的氧化行为.结果表明,铸态合金表面没有形成连续的Cr2O3保护膜,而是形成了含有所有组元氧化物及它们复合氧化物的复杂氧化膜结构.纳米晶Cu-20Ni-20Cr合金在700℃时合金表面形成了连续的Cr2O3氧化膜,而800℃时虽没有形成Cr2O3外氧化膜,但氧化膜规则平坦,外层是CuO,中间层是Cu2O,NiO和Cr2O3组成的混合氧化物区,内层则形成了一薄但不连续的Cr2O3层.晶粒细化降低了合金表面形成Cr2O3氧化膜所需活泼组元Cr的临界浓度.
参考文献
| [1] | Kofstad P.High Temperature Corrosion[M].Elsevier Applied Science,1988:389. |
| [2] | SIMS C T;Stoloff N S;Hagel W C;Wiley J Sons.Superalloys Ⅱ[M].Academics Press,1987:153. |
| [3] | Tien J K;Caufield T.Superalloys,Supercomposites and Superceramics[M].Academics Press,1989:137. |
| [4] | Stott F H;Wood G C;Stringer J .Some Limiting Factors in the Use of Alloys at High Temperature[J].Oxidation of Metals,1995,44:113. |
| [5] | Croll J F;Wallwork G R .The Design of Iron-Chromium-Nickel Alloys for Use at High Temperatures[J].Oxidation of Metals,1969,1:55. |
| [6] | Niu Y;Gesmundo F;Viani F;Rizzo F C Oleira J F .The Corrosion of Two Ni-Nb Alloys under 1 Atm O2 at 600℃-800℃[J].Corrosion Science,1995,37:2043. |
| [7] | Viani F;Nanni P;Gesmundo F .Oxidation of Two-phase Co-55.86wt% Cu Alloy at 700℃-1 000℃[J].Oxidation of Metals,1983,19:53. |
| [8] | Niu Y;Gesmundo F;Viani F;Wu W T .The Air Oxidation of Two-phase Cu-Ag Alloys at 650℃-750℃[J].Oxidation of Metals,1996,46:525. |
| [9] | Bastow B D;Wood G C;Whittle D P .Morphologies of Uniform Adherent Scales on Binary Alloys[J].Oxidation of Metals,1981,16:1. |
| [10] | Cao Z Q;Niu Y;Gesmundo F .The Oxidation of Two Ternary Cu-Ni-Cr Alloys at 700℃-800℃ under High Oxygen Pressures[J].Oxidation of Metals,2001,56(3-4):287. |
| [11] | Cao Z Q;Niu Y;Farne G;Gesmundo F .The Oxidation of the Three-phase Alloy Cu-20Ni-20Cr at 973 K-1 073 K in 101 kPa O2[J].High Temperature Materials and Processes,2001(50):377. |
| [12] | 曹中秋,牛焱,吴维(山文).三相Cu-Ni-30Cr合金高温氧化行为研究[J].稀有金属材料与工程,2003(04):250-254. |
| [13] | Wang F;Gleeson B;Douglass D L .A Diffusional Analysis of the Oxidation of Binary Multiphase Alloys[J].Oxidation of Metals,1990,35:333. |
| [14] | HART E W .On the Role of Dislocation in Bulk Diffusion[J].Acta Materialia,1957,5:597. |
| [15] | Gesmundo F;Viani F;Niu Y;Douglass D L .Further Aspects of the Oxidation of Binary Two-phase Alloys[J].Oxidation of Metals,1993,39:197. |
| [16] | Gesmundo F;Viani F;Niu Y .The Internal Oxidation of Two-phase Binary Alloys under Low Oxidant Pressures[J].Oxidation of Metals,1996,45:51. |
| [17] | Niu Y;Gesmundo F;Viani F;Wu W T .The Air Oxidation of Two-phase Cu-Ag Alloys at 650℃-750℃[J].Oxidation of Metals,1997,47:21. |
| [18] | Gesmundo F;Viani F;Niu Y .The Interal Oxidation of Two-phase Binary Alloys Beneath an External Scale of the Less-stable Oxide[J].Oxidation of Metals,1997,47:355. |
| [19] | 徐耀祖.金属材料热力学[M].北京:科学出版社,1983:244. |
| [20] | CHIANG K T;Mieier G H;Petitt F S.Oxidation Behaviors of Copper-Chromium Composites[J].Microscopy of Oxidation,1998(03):453. |
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%