为了探讨晶粒细化对三元复相合金抗高温氧化行为的影响,采用机械合金化热压制备了纳米晶Cu-45Ni-30Cr 合金,并以热重法及SEM/EDX研究了其在700,800 ℃、0.1 MPa纯氧气中的氧化行为.结果表明: Cu-45Ni-30Cr合金为三相组织,每一相中Cr的含量均较高;合金的氧化动力学较复杂,其瞬时抛物线速率常数随时间延长而降低;晶粒细化降低了合金表面由混合内氧化膜向单一Cr2O3外氧化膜转变的临界浓度,促使Cu-45Ni-30Cr合金表面由混合内氧化膜向单一选择性Cr2O3外氧化膜转化.
参考文献
[1] | Kofstad P.High Temperature Corrosion[M].New York:Elsevier Applied Science,1988:389. |
[2] | SIMS C T;Stoloff N S;Hagel W C.Superalloys Ⅱ[M].New York:Academics Press,1987:153. |
[3] | 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):113-145. |
[4] | Gesmundo F;Niu Y;Viani F.The possible scaling modes in the high-temperature oxidation of two-phase binary alloys.Part 1: low oxidant pressures[J].Oxidation of Metals,1995(43):379-394. |
[5] | Gesmundo F;Viani F;Niu F.The possible scaling modes in the high-temperature oxidation of two-phase binary alloys.Part 1: high oxidant pressures[J].Oxidation of Metals,1994(42):409-429. |
[6] | Fu G Y;Niu Y;Wu W T et al.The oxidation of a Co-15wt%Ce alloy under low oxygen pressures at 600~800 ℃[J].Corrosion Science,1998,40:1215-1128. |
[7] | Beck T R.Anon-consumable metals anode for production of aluminum with low-temperature fluoride melts[J].Light Metals,1994(15):417-431. |
[8] | Hwang E R;Kang S G .A study of a corrosion-resistance coating for separator for a molten carbonate fuel cell[J].Journal of Power Sources,1998,76(02):489-501. |
[9] | Haugsrud R;Kofstad P .On the high temperature oxidation of Cu-rich Cu-Ni alloys[J].Oxidation of Metals,1998,50(3-4):189-213. |
[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):287-297. |
[11] | Cao Z Q;Niu Y;Farne G et al.The oxidation of the three-phase alloy Cu-20Ni-20Cr at 973-1 073 K in 101 kPa O2[J].High Temperature Materials and Processes,2001,20(5-6):377-383. |
[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] | BasuS N;Yurek G J .Effect of alloy grain size and silicon content on the oxidation of austenitic Fe-Cr-Ni-Mn-Si alloys in pure O2[J].Oxidation of Metals,1991,36(3-4):281-290. |
[14] | Wang F H .Oxidation resistance of sputtered Ni3(AlCr) nanocrystalline coating[J].Oxidation of Metals,1997,47(3-4):247-258. |
[15] | Wang F H;Young D J .Effect of nanocrystalline on the corrosion resistance of K38G superalloy in CO+CO2atmospheres[J].Oxidation of Metals,1997,48(5-6):497-509. |
[16] | Narula M L;Tare V B;Worrell W L.Diffusivity and solubility of oxygen in copper using potentiometric techniques[J].Metallurgical and Materials Transactions,1983:673. |
[17] | ARZT E;Schultz E.New materials by mechanical alloying techniques[M].Deutche Gesell:Fur Metallkunde,1989:201. |
[18] | Birringer R.Nanocrystalline materials[J].Materials Science and Engineering,1989:33-43. |
[19] | Hadjipanayis G C;Siegel R W.Nanophase Materials,Synthesis,Properties,Application[M].London:Kluwer Academic Publishers,1994:73-76. |
[20] | Jiang J Z;Gente C;Bormann R.Mechanical alloying in the Fe-Cu system[J].Materials Science and Engineering,1998:268-277. |
[21] | Wagner C .Theoretical analysis of the diffusion process determining the oxidation rate of alloys[J].Journal of the Electrochemical Society,1952,99(02):369-380. |
[22] | 付广艳;牛焱;吴维文山 .二元双相Cu-50Cr合金在700~800 ℃空气中的氧化[J].金属学报,1998,34(02):159-163. |
[23] | William G.The handbook of binary phase diagrams[M].Newyork:The General Electric Company,1978:820. |
[24] | Villars P;Prince A;Okamoto H.Hand of ternary alloy phase diagrams[M].Ohio: ASM,1997:8734-8739. |
[25] | 范景莲;黄伯云;张传福 等.真空烧结纳米W合金粉的致密化及晶粒长大[J].硬质合金,2001,18(04):225-231. |
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%