采用表面机械研磨处理（SMAT）对纯铜进行表面改性，通过金属蒸汽真空弧离子注入技术在纳米表层注入Mo离子。利用光学显微镜（OM）、X射线衍射分析仪（XRD）和扫描电镜（SEM）观察SMAT处理效果，表面存在纳米层和变形层，通过原子力显微镜（AFM）表征纳米层的晶粒尺寸。结果表明：晶粒尺寸得到了显著的抑制，表面纳米层的晶粒在退火后长大到163nm，而注入了Mo离子的只长大到72nm。此外，SMAT并离子注入后材料表面的硬度仅达到SMAT试样的3．5倍，是纯Cu基体硬度的7倍左右。Mo离子的分散和由SMAT及离子注入引入晶体缺陷的反应促使了这些优化现象的产生。
The surface of pure copper was modified using the surface mechanical attrition treatment (SMAT) method ,and molybdenum ions were implanted in the nanosurface using a metal vapor vacu‐um arc (MEVVA) .The results of the SMAT were observed by optical microscopy (OM) ,X‐ray dif‐fraction (XRD) and scanning electron microscopy (SEM ) .An obvious nanocrystalline layer and a de‐formation region exist on the surface .The size of the nanocrystalline layer was characterized using atomic force microscopy (AFM ) .The results indicate remarkable suppression on grain size ,the nano‐crystalline layer grows to 163nm after annealing and reduces to only 72nm due to the Mo ion implanta‐tion .In addition ,the hardness of the topmost surface of the material is 3 .5 times that of the SMATed copper ,w hich is about 7 times of the value of the matrix .T he above improvements most likely result from the dispersion of the Mo ions and the reactions of the crystal defects due to the SMAT and ion implantation .
参考文献
| [1] | 毛向阳;李东阳;王章忠;赵秀明;蔡璐.Cu-30Ni 合金机械冲击表面纳米化组织和性能[J].中国有色金属学报（英文版）,2013(6):1694-1700. |
| [2] | K. S. Kumar;H. Van Swygenhoven;S. Suresh.Mechanical behavior of nanocrystalline metals and alloys[J].Acta materialia,200319(19):5743-5774. |
| [3] | Tjong SC;Chen H.Nanocrystalline materials and coatings[J].Materials Science & Engineering, R. Reports: A Review Journal,20041/2(1/2):1-88. |
| [4] | G. Liu;S.C. Wang;X.F. Lou.LOW CARBON STEEL WITH NANOSTRUCTURED SURFACE LAYER INDUCED BY HIGH-ENERGY SHOT PEENING[J].Scripta materialia,20018-9(8-9):1791-1795. |
| [5] | K. Lu;J. Lu.Nanostructured surface layer on metallic materials induced by surface mechanical attrition treatment[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20040(0):38-45. |
| [6] | 张洪旺;刘刚;黑祖昆;吕坚;卢柯.表面机械研磨诱导AISI 304不锈钢表层纳米化Ⅰ.组织与性能[J].金属学报,2003(4):342-346. |
| [7] | T. Balusamy;Satendra Kumar;T.S.N. Sankara Narayanan.Effect of surface nanocrystallization on the corrosion behaviour of AISI 409 stainless steel[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,201011(11):3826-3834. |
| [8] | 王镇波;雍兴平;陶乃殚;李曙;刘刚;吕坚;卢柯.表面纳米化对低碳钢摩擦磨损性能的影响[J].金属学报,2001(12):1251-1255. |
| [9] | Kai Feng;Xun Cai;Zhuguo Li;Paul K. Chu.Improved corrosion resistance of stainless steel 316L by Ti ion implantation[J].Materials Letters,2012:450-452. |
| [10] | Okada A.;Aso Y.;Hosoya H.;Kiritani M..Tungsten ion implantation into copper by use of metal arc-plasma electro-magnetically accelerated to several km s(-1)[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,20031/2(1/2):202-206. |
| [11] | Torrisi L;Mezzasalma AM;Gammino S;Badziak J;Parys P;Wolowski J;Laska L;Franco G.Ion implantation induced by Cu ablation at high laser fluence[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,200624(24):8533-8538. |
| [12] | 苗伟;陶琨;李彬;柳百新.锆、钒离子注入铝形成金属间化合物[J].真空科学与技术学报,2001(4):269-272,280. |
| [13] | Korotcenkov, G.;Cho, B.K..The role of grain size on the thermal instability of nanostructured metal oxides used in gas sensor applications and approaches for grain-size stabilization[J].Progress in Crystal Growth and Characterization of Materials,20124(4):167-208. |
| [14] | M. Laleh;Farzad Kargar.Suppression of chromium depletion and sensitization in austenitic stainless steel by surface mechanical attrition treatment[J].Materials Letters,201112(12):1935-1937. |
| [15] | Wei Li;Zhinan An;Xiaodong Wang;Yonghua Rong.Grain growth kinetics of nanocrystalline martensite in Fe-30 wt.%Ni alloy[J].Materials Letters,200817/18(17/18):3262-3265. |
| [16] | N.R. Tao;M.L. Sui.Surface nano crystallization of iron induced by ultrasonic shot peening[J].Nanostructured Materials,19994(4):433-440. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%