采用扩展X射线精细结构谱(EXAFS)分析了Mg65Cu25YxGd10-x(x=0,5,10)非晶合金局域原子结构及合金的玻璃形成能力差异的原因.结果表明,随着替代元素Gd含量的增加,淬态Mg65Cu25YxGd10-x非晶合金吸收原子Cu周围的配位数单调增加,而最近邻原子间距呈现出微弱的下降,短程有序进一步增强.Mg65Cu25YxGd10-x系非晶合金中Cu原子周围形成配位数越大、原子间束缚更加紧密的多面体构型的短程有序结构,越有利于合金玻璃形成能力的提高.
参考文献
| [1] | Park E S et al.[J].Materials Science Forum,2001,360-362:95. |
| [2] | Kang H G et al.[J].Mawr TransJIM,2000,41:846 849. |
| [3] | Amiya K et al.[J].MaWr Trans JIM,2000,41:1460. |
| [4] | Amiya K et al.[J].Materials Transactions-Japan Institute of Metals,2001,42:543. |
| [5] | Park ES.;Kim WT.;Kim DH.;Kang HG. .The effect of Ag addition on the glass-forming ability of Mg-Cu-Y metallic glass alloys[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2001(2/3):154-160. |
| [6] | Men H et al.[J].Scripta Materialia,2002,46:699. |
| [7] | Ma H.;Ma E.;Xu J. .A new Mg65Cu7.5Ni7.5Zn5Ag5Y10 bulk metallic glass with strong glass-forming ability[J].Journal of Materials Research,2003(10):2288-2291. |
| [8] | Men H et al.[J].Mawr Trans JIM,2003,44:2141. |
| [9] | Ma H et al.[J].Applied Physics Letters,2005,87:181 915. |
| [10] | Zheng Q et al.[J].Scripta Materialia,2007,56:161. |
| [11] | Men H;Kim WT;Kim DH .Glass formation and crystallization behavior in Mg65Cu25Y10-xGdx (x=0, 5 and 10) alloys[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2004(1):29-35. |
| [12] | Men H.;Kim DH. .Fabrication of ternary Mg-Cu-Gd bulk metallic glass with high glass-forming ability under air atmosphere[J].Journal of Materials Research,2003(7):1502-1504. |
| [13] | Lin C K et al.[J].Intermetallics,2004,12(7-9):1011. |
| [14] | Ome I et al.[J].Journal of Non-Crystalline Solids,2001,287:75. |
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%