The influence of pre-annealing on thermal stability of the amorphous Zr70Cu20Ni10 alloy was reported by employing the differential scanning calorimetry (DSC) and high-resolution transmission electron microscopy (HRTEM) techniques. It has been observed that the supercooled liquid region decreases with increasing the annealing time under isothermal conditions, indicating that the thermal stability of the amorphous Zr70Cu20Ni10 alloy decreases gradually. HRTEM observations reveal that there exist some ordered atomic clusters in the amorphous matrix at the relaxation stage. These ordered atomic clusters can be regarded as precursors for the precipitation of the crystalline phases in the subsequent crystallization process. The reasons resulting in the decrease in thermal stability of the amorphous Zr70Cu20Ni10 alloy with annealing time are discussed through the Gaussian decomposition for the radial distribution function of the amorphous Zr70Cu20Nii0 alloy.
参考文献
| [1] | Kitada M.;Imafuku M.;Saida J.;Inoue A. .Structural study of quasicrystallization in Zr-NM (NM=Pd or Pt) metallic glasses[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,2002(0):594-598. |
| [2] | Waseda Y;Chen H.S .On the structure of amorphous Fe84B16[J].Solid State Communications,1978,27(08):809. |
| [3] | Takahara Y.;Narita N. .EXAFS and Mossbauer studies on local atomic structure in an amorphous Fe-B-Si alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(1/2):153-157. |
| [4] | Matsubara E;Sato S;Imafuku M;Nakamura T, Koshiba H, Inoue A, and Waseda Y .Structural study of amorphous Fe70M10B20 (M = Zr, Nb and Cr)alloys by X-ray diffraction[J].Materials Science and Engineering A,312 |
| [5] | Imafuku M.;Sato S.;Zhang W.;Inoue A.;Waseda Y.;Yaoita K. .Local atomic structure of Fe-Co-Ln-B (Ln = Sm, Tb or Dy) amorphous alloys with supercooled liquid region[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2001(0):660-664. |
| [6] | Buschow K H J;Beekmans N. M .Thermal stability of amorphous alloys[J].Solid State communications,1980,35(03):233. |
| [7] | Z.F. Dong;K. Lu .Influence of pre-annealing on the thermal stability of a nanocrystalline Hf-Ni alloy[J].Nanostructured Materials,1999(2):187-194. |
| [8] | Wang H R;Hui X D;Min G.H;Ye Y.F. , Teng X.Y Shi Z.Q .Formation of nanocrystals in metallic Zr-Cu-Ni glass[J].Journal of Alloys and Compounds,2002,347(1-2):101. |
| [9] | Zhang L.;Bian XF.;Li H.;Wang WM.;Wu S.;Wu YS. .Short-range and medium-range order in liquid and amorphous Al90Fe5Ce5 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,2000(1/3):169-176. |
| [10] | Zhang L;Wu Y·S;Bian X·F .Origin of the prepeak in the structure factors of liquid and amorphous Al-Fe-Ce alloys [J].Journal of Physics:Condensed Matter,1999,11:7959. |
| [11] | Wang WH.;Friedrich S.;Wei Q. .Microstructure, decomposition, and crystallization in Zr41Ti14Cu12.5Ni10Be22.5 bulk metallic glass[J].Physical Review.B.Condensed Matter,1998(14):8211-8217. |
| [12] | Wang H.R;Tian X.L;Teng X.Y;Shi Z.Q, Ye Y.F, Min G.H, and Qin J.Y .Short-range and medim-range order in liquid Cu-Ni alloy[J].Chin.Phys. Lett,19 |
| [13] | Gerold U;Wiedenmann A;Bellissent R;Macht M. P, and Wollenberger H .Local atomic correlations of bulk amorphous ZrTiCuNiBe alloys[J].Nanostructured Materials,12 |
| [14] | Inoue A .Stabilization of metallic supercooled liquid and bulk amorphous alloys[J].Acta Materialia,48 |
| [15] | Schumacher H;Herr U;Oelgeschlaeger D;Traverse A, and Samwer K .Structural changes of the metallic glass Zr65Al7.5Cu27.5 during glass transition and in the undercooled liquid region[J].Journal of Applied Physics,82 |
| [16] | Mauern N;Kuhn U;Hermann H;Ehrenberg H, Neuefeind J, and Eckert J .Short-range order of Zr62-xTixAl10Cu20Ni8 bulk metallic glasses[J].Acta Materialia,50 |
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