Cu46Zr47-xAl7Mx (M = Ce, Pr, Tb, and Gd) bulk metallic glassy (BMG) alloys were prepared by copper-mold vacuum suction casting. The effects of rare-earth elements on the glass-forming ability (GFA), thermal stability, and mechanical properties of Cu46Zr47-xAl7Mx were investigated. The GFA of Cu46Zr47-xAl7Mx(M = Ce, Pr) alloys is dependent on the content of Ce and Pr, and the optimal content is 4 at.%.Cu46Zr47-xAl7Tbx (x = 2, 4, and 5) amorphous alloys with a diameter of 5 mm can be prepared. The GFA of Cu46Zr47-xAl7Gdx (x = 2, 4, and 5)increases with increasing Gd. Tx and Tp of all decrease. Tg is dependent on the rare-earth element and its content. △Tx for most of these alloys decreases except the Cu46Zr42Al7Gd5 alloy. The activation energies △Eg, △Ex, and △Ep for the Cu46Zr42Al7Gd5 BMG alloy with Kissinger equations are 340.7, 211.3, and 211.3 kJ/mol, respectively. These values with Ozawa equations are 334.8, 210.3, and 210.3 LJ/mol, respec-tively. The Cu46Zr45Al7Tb2 alloy presents the highest microhardness, Hv 590, while the Cu46Zr43Al7Pr4 alloy presents the least, Hv 479. The compressive strength (σc.f.) of the Cu46Zr43Al7Gd4 BMG alloy is higher than that of the Cu43Zr43Al7Tb4 BMG alloy.
参考文献
| [1] | Akihisa Inoue;Wei Zhang .Formation, Thermal Stability and Mechanical Properties of Cu-Zr-Al Bulk Glassy Alloys[J].Materials transactions,2002(11):2921-2925. |
| [2] | Qingsheng Zhang;Wei Zhang;Guoqiang Xie .Glass-Forming Ability and Mechanical Properties of the Ternary Cu-Zr-Al and Quaternary Cu-Zr-Al-Ag Bulk Metallic Glasses[J].Materials transactions,2007(7):1626-1630. |
| [3] | Wang Q;Qiang J,B;Xia J,H;Wu J,,Wang Y,M,,and Dong C .Cu-Zr-Al (Ti) bulk metallic glasses:Cluster selection rules and glass formation[J].INTERMETALLICS,2007,15(5-6):711. |
| [4] | 寇生中,李春燕,许广济,丁雨田,胡勇.Cu模吸铸法制备Cu-基块体非晶合金[J].特种铸造及有色合金,2005(12):705-707. |
| [5] | 寇生中,高忙忙,李云飞,丁雨田,许广济.熔体过热处理对Cu基块状非晶形成能力的影响及块状非晶的DSC研究[J].铸造,2007(03):255-257. |
| [6] | Zhang Y;Chen J;He J.P;Yao K.F.,Wei B.C.,and Chen G.L .Metallographic analysis of Cu-Zr-Al bulk amorphous alloys with yttrium addition[J].Scripta Materialia,2006,54(07):1351. |
| [7] | E.S. Park;D.H. Kim .Phase separation and enhancement of plasticity in Cu-Zr-Al-Y bulk metallic glasses[J].Acta materialia,2006(10):2597-2604. |
| [8] | Zhang W;Qin C.L;Zhang X.G;Inoue A .Effects of additional noble elements on the thermal stability and mechanical properties of Cu-Zr-Al bulk glassy alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2007,449-451(25):631. |
| [9] | Tam MK;Pang SJ;Shek CH .Effects of niobium on thermal stability and corrosion behavior of glassy Cu-Zr-Al-Nb alloys[J].The journal of physics and chemistry of solids,2006(4):762-766. |
| [10] | Chunling Qin;Wei Zhang;Hisamichi Kimura .New Cu-Zr-Al-Nb Bulk Glassy Alloys with High Corrosion Resistance[J].Materials transactions,2004(6):1958-1961. |
| [11] | Zander D;Heisterkamp B;Gallino I .Corrosion resistance of Cu-Zr-Al-Y and Zr-Cu-Ni-Al-Nb bulk metallic glasses[J].Journal of Alloys and Compounds,2007,434-435(31):234. |
| [12] | Qingsheng Zhang;Wei Zhang;Guoqiang Xie .Glass-Forming Ability and Mechanical Properties of the Ternary Cu-Zr-Al and Quaternary Cu-Zr-Al-Ag Bulk Metallic Glasses[J].Materials transactions,2007(7):1626-1630. |
| [13] | Y.C. Kim;J. C. Lee;P. R. Cha;J. P. Ahn;E. Fleury .Enhanced glass forming ability and mechanical properties of new Cu-based bulk metallic glasses[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(2):248-253. |
| [14] | Fu HM;Wang H;Zhang HF;Hu ZQ .The effect of Gd addition on the glass-forming ability of Cu-Zr-Al alloy[J].Scripta materialia,2006(2):147-150. |
| [15] | Fu J.Y;Men H;Pang S.J;Ma C.L.,and Zhang T .Formation and thermal stability of Cu-Zr-Al-Er bulk metallic glasses with high glass-forming ability[J].Journal of University of Science and Technology Beijing,2007,14(Suppl.1):36. |
| [16] | Xiang Ke Wang;Jun Ying Fu;Chao Li Ma .Formation and Mechanical Properties of Cu-Zr-Al-Sn Bulk Metallic Glasses[J].Materials transactions,2006(1):194-197. |
| [17] | Xu X;Chen L.Y;Zhang G.Q;Wang L.N.,and Jiang J.Z .Formation of bulk metallic glasses in Cu45Zr48-xAl7REx (RE = La,Ce,Nd,Gd and 0≤x≤5at%)[J].INTERMETALLICS,2007,15:1066. |
| [18] | Xu D.H;Duan G;Johnson W.L .Unusual glass-forming ability of bulk amorphous alloys based on ordinary copper[J].Physical Review Letters,2004,92(24):1. |
| [19] | Cheney J;Vecchio K .Evaluation of glass-forming ability in metals using multi-model techniques[J].Journal of Alloys and Compounds,2009,471:222. |
| [20] | Wakeda M;Shibutani Y;Ogata S;Park J .Relationship between local geometrical factors and mechanical properties for Cu-Zr amorphous alloys[J].INTERMETALLICS,2007,15(02):139. |
| [21] | Akira Takeuchi;Akihisa Inoue .Classification of Bulk Metallic Glasses by Atomic Size Difference, Heat of Mixing and Period of Constituent Elements and Its Application to Characterization of the Main Alloying Element (Overview)[J].Materials transactions,2005(12):2817-2829. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%