Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
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The Influence of (Pd+Ag) Additions on the Glass Forming Ability of Zr-Al-Cu-Ni based Alloys

Zr-Al-Cu-Ni계 합금의 비정질형성능에 미치는 Pd과 Ag 복합첨가의 영향

  • Kim, Mi-Hye (Grauate School, Division of Materials Sci. and Eng., Pukyong National University) ;
  • Lee, Byung-Woo (Division of Materials Sci. and Eng., Pukyong National University) ;
  • Kim, Sung-Gyu (Division of Materials Sci. and Eng., Pukyong National University) ;
  • Bae, Cha-Hurn (Division of Materials Sci. and Eng., Pukyong National University) ;
  • Jeong, Hae-Yong (Division of Materials Sci. and Eng., Pukyong National University)
  • 김미혜 (부경대학교 신소재공학부 대학원) ;
  • 이병우 (부경대학교 신소재공학부) ;
  • 김성규 (부경대학교 신소재공학부) ;
  • 배차헌 (부경대학교 신소재공학부) ;
  • 정해용 (부경대학교 신소재공학부)
  • Published : 2004.02.20
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Abstract

The influence of Pd and Ag additions on the thermal stability, the glass forming ability (GFA) and mechanical property of $Zr_{55}Al_{10}Cu_{20}Ni_{10}Pb_{(5-x)}Ag_x$ (x = $0{\sim}5at%$) alloys obtained by melt spun and injection casting method have been investigated by using of X-ray diffraction, thermal analysis (DTA, DSC) and micro-Vickers hardness(Hv) testing. The thermal properties of melt-spun $Zr_{55}Al_{10}Cu_{20}Ni_{10}Pb_{(5-x)}Ag_x$ (x = $0{\sim}5at%$) alloys exhibit a supercooled liquid region(${\Delta}T_x$) exceeding 91 K before crystallization. The largest ${\Delta}T_x$ reaches as large as 126 K for the $Zr_{55}Al_{10}Cu_{20}Ni_{10}Pb_5$ alloy. The reduced glass transition temperature, $T_{rg}$ increased with increasing Ag content. The largest $T_{rg}$ is obtained for the $Zr_{55}Al_{10}Cu_{10}Ni_{10}Ag_5$ alloy. The $Zr_{55}Al_{10}Cu_{10}Ni_{10}Ag_5$ bulk amorphous alloy rod with 3 mm in diameter was fabricated by injection casting. Hv increased with increasing Ag content and the largest value was obtained for the $Zr_{55}Al_{10}Cu_{10}Ni_{10}Ag_5$ bulk amorphous alloy.

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References

  1. A. Inoue : Acta Mater., 'Stabilization of metallic supercooled liquid and bulk amorphous alloys', 48 (2000) 279306 https://doi.org/10.1016/S1359-6454(99)00300-6
  2. A. L. Greer: Science, 'Metallic glasses, 267 (1995) 1947-1953 https://doi.org/10.1126/science.267.5206.1947
  3. H. S. Chen and D. Turnbull: Acta Met., 'Fonnation, stability and structure of Palladium-Silicon based alloy glasses', 17 (1969) 1021-1031 https://doi.org/10.1016/0001-6160(69)90048-0
  4. M. C. Lee, J. M. Kendall and W. L. Johnson: Appl. Phys. Lett., 'Spheres of the metallic glass $Au_5_5Pb_2_2_._5Sb_2_2_._5$and their surface characteristics', 40(5) (1982) 382-384 https://doi.org/10.1063/1.93110
  5. S. G. Kim, A.lnoue, T. Masumoto : Mater. Trans., JIM, 'High mechanical strengths of Mg-Ni-Y and Mg-Cu-Y amorphous alloys with significant supercooled liquid region', 31 (1990) 929-934 https://doi.org/10.2320/matertrans1989.31.929
  6. A. Inoue, H. Yamaguchi, T. Zhang and T. Masumoto : Mater. Trans., JIM, 'AI-La-Cu amorphous alloys with a wide supercooled liquid region', 31 (1990) 104-109 https://doi.org/10.2320/matertrans1989.31.104
  7. H. S. Chen: Acta Met., 'Thennodynamic considerations on the formation and stability of metallic glasses', 22 (1974) 1505-1511 https://doi.org/10.1016/0001-6160(74)90112-6
  8. A. Inoue, T. Zhangand T. Masumoto : Mater. Trans., JIM, 'Zr-AI-Ni amorphous alloys with high glass transition temperature and significant supercooled liquid region', 31 (1990) 177-183 https://doi.org/10.2320/matertrans1989.31.177
  9. A. Peker and W. L. Johnson: Appl. Phys. Lett., 'A highly processable metallic glass: $Zr_4_1_._2Ti_1_3_._8Cu_1_2_._5Ni_1_0_._0Be_2_2_._5$, 63 (1993) 2342-2344 https://doi.org/10.1063/1.110520
  10. L. A. Davis: Metallic glass, Papers Presented at a Seminar of the Materials Science Division of the ASM in 1976(American Society for Metals, Ohio, 1978)
  11. Atakan Peker : Dissertation, 'Formation and characterization of bulk metallic glasses' California Institute of Technology, Pasadena, California (1984)
  12. T. Zhang, A. Inoue and T. Masumoto : Mater. Trans., JIM, 'Amorphous Zr-AI-TM(TM=Co, Ni, Cu) alloys with significant supercooled liquid region of over lOOK', 32 (1991) 1005-1010 https://doi.org/10.2320/matertrans1989.32.1005