Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-19T09:14:48.045Z Has data issue: false hasContentIssue false
  • English
  • Français

Investigation on the Thermal Stability of Bulk Glass Forming Alloy Pd-Cu-Ni-P

Published online by Cambridge University Press:  17 March 2011

I.-R. Lu ,
G. P. Görler ,
R. Willnecker  and
H. J. Fecht
I.-R. Lu
Affiliation:
Institute of Space Simulation, DLR, Linder Hoehe, D-51147 Cologne, Germany
G. P. Görler
Affiliation:
Institute of Space Simulation, DLR, Linder Hoehe, D-51147 Cologne, Germany
R. Willnecker
Affiliation:
Institute of Space Simulation, DLR, Linder Hoehe, D-51147 Cologne, Germany
H. J. Fecht
Affiliation:
Faculty of Engineering, Materials Division, Ulm University Albert Einstein Allee 47, D-89081 Ulm, Germany
Get access

Abstract

The metallic glass former Pd-Ni-P is well known for its pronounced stability against crystallization. Samples of this alloy vitrify completely at low cooling rates down to 0.1 K/s. The addition of copper to this alloy system reduces further the crystallization kinetics significantly. Investigations on critical cooling rates were performed on Pd-Cu-Ni-P alloy by means of isothermal nucleation experiments. The results indicate a critical cooling rate in the order of 5.10−3 K/s, which is the lowest one presently known for metallic glass-formers. The high stability against crystallization during cooling allows for simultaneous measurements of its thermodynamic properties within the entire temperature range from the regime of the liquid to the glassy state. Heat capacity measurements were carried out by differential heat-flow calorimetry and the coefficient of thermal expansion was determined by applying sessile drop technique. The results can be described within the free-volume model.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 644: Symposium L – Supercooled Liquid, Bulk Glassy and Nanocrystalline State of Alloys , 2000 , L3.2
Copyright
Copyright © Materials Research Society 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Chen, H. S., Acta Met. 22 (1974) 1505 Google Scholar
2 Kui, H. W., Greer, A. L., Turnbull, D., Appl. Phys. Lett. 45 (1984) 615 Google Scholar
3 Willnecker, R., Wittmann, K. and Görler, G. P., J. Non-Cryst. Solids 156–158 (1993) 450 Google Scholar
4 Nishiyama, N., Inoue, A., Mater. Trans. JIM 38, (1997) 464 Google Scholar
5 Lu, I.-R., Wilde, G., Görler, G. P., Willnecker, R., J. Non-Cryst. Solids 250–255 (1) (1999) 577 Google Scholar
6 Lu, I.-R., Görler, G. P., Fecht, H.-J., Willnecker, R., J. Non-Cryst. Solids 274 (2000) 294 Google Scholar
7 Schroers, J., Johnson, W. L., Busch, R., Appl. Phys. Lett. 77 (2000) 1158 Google Scholar
8 Moynihan, C. T., Rev. in Mineralogy 32 (1995) 1 Google Scholar
9 Fu-Qian, Zheng, Mater. Sci. Eng. A134 (1991) 996 Google Scholar
10 Scherer, G. W., J. Am. Ceram. Soc. 75 (5) (1992) 1060 Google Scholar