通过表面改性及化学镀镍技术制备出镍包覆Y2O3粉，并以不同质量分数（O％～1000）添加到镍基高温合金粉中，采用机械合金化和真空烧结工艺制备出氮化物弥散强化（ODS）镍基高温合金，研究了镍包覆及纳米Y2O3添加量对合金组织、相对密度和抗拉强度的影响。结果表明：镍包覆处理降低了片状、网状黑色相Y2O3的偏聚，使纳米Y2O3粉的最佳添加量（质量分数）、相对密度、抗拉强度由包覆前的1．5％，95．32％，639MPa增加到了5％，97．45％，725MPa。
Nickel plated Y2O3powders were prepared by surface modifying and chemical nickel plating technology, and was added into nickel-based high temperature alloy powders to prepare oxide dispersion strengthened (ODS) nickel-based high temperature alloy by mechanical alloying and vacuum sintering process, and the effects nickel plating and Y2O3 phase content on microstructure, relative density and tensile strength of the alloy were studied. The results show that nickel plating process improved the segregation of black Y2O3 phase with flake and net-work, and increased the optimal adding amount ofY2O3 powders, relative density and tensile strength from 1.5wt%, 95.32%, 639 MPa, before nickel plating, to 5wt%, 97.45%,725 MPa.
参考文献
| [1] | 柳光祖,田耘,单秉权.氧化物弥散强化高温合金[J].粉末冶金技术,2001(01):20-23. |
| [2] | S.Weinbruch;A. Anastassiadis .On the Mechanism of High-Temperature Oxidation of ODS Superalloys: Significance of Yttrium Depletion Within the Oxide Scales[J].Oxidation of Metals,1999(1/2):111-128. |
| [3] | Eggeler G.;Klam H.J. .On the Influence of Grain Morphology on Creep Deformation and Damage Mechanisms in Directionally Solidified and Oxide Dispersion Strengthened Superalloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(4):879-890. |
| [4] | 黎德育,李宁,李柏松.粉体上的化学镀镍[J].材料科学与工艺,2003(04):414-418. |
| [5] | Wang R.M.;Song Y.G. .Effect of rare earth on the microstructures and properties of a low expansion superalloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1):60-64. |
| [6] | 赵亮 .Y<,2>O<,3>/Ni高温合金的制备与性能研究[D].兰州大学,2006. |
| [7] | 王志伟,施雨湘.TiAl纳米合金的机械活化-放电等离子原位烧结[J].功能材料,2005(11):1794-1797. |
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