Relation between short-range order and crystallization behavior in Zr-based amorphous alloys

Xing, L. Q.; Hufnagel, T. C.; Eckert, J.; Lo¨ser, W.; Schultz, L.
September 2000
Applied Physics Letters;9/25/2000, Vol. 77 Issue 13
Academic Journal
We have examined the effect of Ti and cooling rate on the crystallization of Zr[sub 62-x]Ti[sub x]Cu[sub 20]Ni[sub 8]Al[sub 10](0≤x≤10) amorphous alloys. Ti stabilizes an icosahedral phase in Zr[sub 62-x]Ti[sub x]Cu[sub 20]Ni[sub 8]Al[sub 10](0≤x≤10) alloys. Without Ti (x=0), crystallization produces cubic and tetragonal intermetallic phases, and the crystallization temperature shows no dependence on the cooling rate at which the amorphous alloy was produced. The alloys containing Ti (3≤x≤10) precipitate an icosahedral quasicrystalline phase upon annealing, and show a significant reduction of crystallization temperatures with decreasing cooling rates of casting. We propose that the undercooled melts and amorphous alloys have icosahedral short-range order. The degree of short-range order or medium-range order in the amorphous alloys increases with decreasing cooling rate. Crystallization is easier when the precipitating phase resembles the short-range order of the amorphous solid. Therefore, the crystallization temperature is reduced when the precipitates are icosahedral. The dissimilarity between the structures of the precipitates and the short-range order in amorphous Zr[sub 62]Cu[sub 20]Ni[sub 8]Al[sub 10] may be one of the reasons for its very wide supercooled liquid region. © 2000 American Institute of Physics.


Related Articles

  • Relationship between changes in compositional short-range order and field-induced anisotropy in amorphous Co58.3Fe4.7Ni10Si11B16 alloy. Yokota, R.; Miyazaki, M.; Komatsu, T.; Matusita, K. // Journal of Applied Physics;12/1/1985, Vol. 58 Issue 11, p4237 

    Presents a study which examined the relationship between changes in compositional short-range order and field-induced anisotropy in an amorphous alloy. Method of the study; Results and discussion; Conclusion.

  • Excess free volume and mechanical properties of amorphous alloys. Betekhtin, V. I.; Kadomtsev, A. G.; Kipyatkova, A. Yu.; Glezer, A. M. // Physics of the Solid State;Jan98, Vol. 40 Issue 1, p74 

    Characteristics of the excess free volume in amorphous alloys quenched from a melt are investigated and analyzed. It is established by small-angle x-ray scattering that the application of intense hydrostatic pressure causes this volume to decrease. This decrease leads to an enhancement of a...

  • Ultrasonic study of mechanically alloyed amorphous PdSiCu. Hikata, A.; McKenna, M. J.; Elbaum, C. // Journal of Applied Physics;3/15/1988, Vol. 63 Issue 6, p1910 

    Presents information on study which examined the mechanical alloying of amorphous Pd[sub0.775]Si[sub0.165]Cu[sub0.060]. Feature of the amorphous materials; Sample preparation and experiments; Results and discussion; Conclusions.

  • Amorphization induced by ion mixing in Fe–Mo multilayered films: Correlation with the number of metal layers. Zhang, Z. J. // Journal of Applied Physics;2/15/1997, Vol. 81 Issue 4, p2027 

    In the Fe-Mo system, amorphous alloys are thermodynamically unstable and are hard to form in the bulk state. In multilayered films, however, amorphous alloys were produced by room temperature 200 keV xenon ion mixing. It was found, when keeping the total thickness of the multilayered film...

  • Fractal analysis of magnetic aftereffects in the amorphous alloy Fe40Ni40P14B6 at 500 K (abstract). Rivas, J.; López-Quintela, M. A.; Walz, F.; Kronmüller, H. // Journal of Applied Physics;11/15/1988, Vol. 64 Issue 10, p5507 

    Presents an abstract of the article 'Fractal Analysis of Magnetic Aftereffects in the Amorphous Alloy Fe[sub40]Ni[sub40]P[sub14]B[sub6] at 500 K,' by J. Rivas, M. A. López-Quintela, F. Walz and H. Kronmüller.

  • A model for the reversible magnetization in amorphous alloys. Appino, C.; Fiorillo, F. // Journal of Applied Physics;11/1/1994, Vol. 76 Issue 9, p5371 

    Presents a study on a model that quantitatively describes the reversible magnetization process and its contribution to the magnetization curve in soft amorphous ribbons. Characteristics of amorphous alloys; Theory; Derivation of equations; Results and discussion.

  • Crystallization and structural relaxation of amorphous FeNiSiB alloys due to rapid heating. Kopcewicz, Michał; Jackiewicz, Ewa; Załuski, Leszek; Załuska, Alicja // Journal of Applied Physics;4/15/1992, Vol. 71 Issue 8, p3997 

    Focuses on a study which described the crystallization and structural relaxation of amorphous FeNiSiB alloys due to rapid heating. Background to the study; Experimental procedures; Results and discussion.

  • Synthesis of iron-based bulk metallic glasses as nonferromagnetic amorphous steel alloys. Ponnambalam, V.; Poon, S. Joseph; Shiflet, Gary J.; Keppens, Veerle M.; Taylor, R.; Petculescu, G. // Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1131 

    Iron-based amorphous metals are investigated as nonferromagnetic amorphous steel alloys with magnetic transition temperatures well below ambient temperatures. Rod-shaped amorphous samples with diameters reaching 4 mm are obtained using injection casting. Amorphous steel alloys are designed by...

  • Magnetocaloric effect in bulk amorphous Pd[sub 40]Ni[sub 22.5]Fe[sub 17.5]P[sub 20] alloy. Shen, T. D.; Schwarz, R. B.; Coulter, J. Y.; Thompson, J. D. // Journal of Applied Physics;4/15/2002, Vol. 91 Issue 8, p5240 

    We have studied the temperature (T) and field (H) dependence of the magnetocaloric effect in a bulk amorphous Pd[sub 40]Ni[sub 22.5]Fe[sub 17.5]P[sub 20] alloy. With decreasing T, and depending on H, the alloy exhibits superparamagnetic, field-induced ferromagnetic, and spin-glass behavior. The...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics