Thermal and Elastic Properties of Cu-Hf-Al Bulk Metallic Glasses

다국어 초록 (Multilingual Abstract)

Stable bulk glass forming alloys can be developed over a wide range of compositions in the Cu-Hf-Al ternary system. The compositional and the cooling rate dependences of the thermal and the elastic properties of Cu-Hf-Al alloys were systematically investigated. Evidence of the amorphous nature of the cast rods was provided by X-ray spectra. The glass transition temperature (Tg)and crystallization temperature (Tx) were obtained for the alloys by using differential scanning calorimetry (DSC) at a heating rate of 20 K/min. In the results, the differences between the glass temperature and the crystallization temperature (Tx = Tx . Tg) were measured to have values ranging up to 72 . 74 K. The elastic constants for several selected alloys were measured using ultrasonic methods. The values of the elastic shear modulus, bulk modulus, and Poisson’s ratio are also given.

참고문헌 (Reference)

1 A. Peker, 63 : 2342-, 1993

2 W. L. Johnson, 95 : 195501-, 2005

3 D. H. Xu, 52 : 3493-, 2004

4 H. Choi-Yim, 82 : 1030-, 2003

5 H. Choi-Yim, 54 : 187-, 2006

6 T. Zhang, 12 : 700-, 1993

7 A. Inoue, 156 : 473-, 1993

8 A. Inoue, 48 : 279-, 2000

9 A. Inoue, 14 : 936-, 2006

10 D. V. Louzguine, 83 : 3191-, 2003

11 A. Inoue, 18 : 1435-, 2003

12 A. Inoue, 49 : 2645-, 2001

13 Y. J. Yang, 448 : 15-, 2007

14 P. Jia, 54 : 2165-, 2006

15 C. L. Dai, 54 : 1403-, 2006

16 H. B. Cao, 56 : 2032-, 2008

17 D. W. Xing, 62 : 44-, 2008

18 E. S. Park, 351 : 1232-, 2005

19 J. An, 17 : 318-, 2010

20 J. Schroers, 93 : 255506-, 2004

21 J. J. Lewandoski, 85 : 77-, 2005

22 G. Duan, 89 : 1901-, 2006

23 M. D. Demetriou, 97 : 065502-, 2006

24 X. H. Lin, 78 : 6514-, 1995