Journal of Korea Foundry Society (한국주조공학회지)

Korea Foundry Society (한국주조공학회)
권호 표지

Glass Forming Ability of Bulk Amorphous Alloy Scrap by Fluxing

플럭스처리에 의한 벌크비정질합금 스크랩의 비정질형성능

  • Kang, Bok-Hyun (Dept. of Materials Engineering, Korea University of Technology and Education) ;
  • Kim, Ki-Young (Dept. of Materials Engineering, Korea University of Technology and Education)
  • 강복현 (한국기술교육대학교 신소재공학과) ;
  • 김기영 (한국기술교육대학교 신소재공학과)
  • Received : 2010.04.27
  • Accepted : 2010.06.16
  • Published : 2010.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

When the returned scrap of bulk amorphous alloy is remelted, impurities such as oxides and intermetallic compounds increase. Glass forming ability of its scrap is deteriorated remarkably. Melt fluxing technique is introduced to enhance the glass forming ability during melting and freezing of bulk amorphous alloys. Cu and Zr based alloys are chosen. Small pieces of these alloy scraps and $B_2O_3$ flux are put together in a quartz tube. Cyclic heating and cooling are done by induction heating and water quenching or air cooling. Melting fluxing was effective for both Cu-based and Zr-based alloy, and their glass forming abilities were improved with increasing the number of fluxing.

Keywords

References

  1. W. L. Johnson: MRS Bulletin, "Bulk glass-forming metallic alloys; science and technology", 10(1999) 42- 56
  2. A. Inoue: Acta Mater.,"Stabilization of metallic supercooled liquid and bulk amorphous alloys", 48(2000) 279-306. https://doi.org/10.1016/S1359-6454(99)00300-6
  3. W. H. Wang, C. Dong and C. H. Shek: Mater.Sci.Eng., "Bulk metallic glasses", R44(2004) 45-89.
  4. K. Y. Kim et al.: "Castability of $Cu_{54}Ni_6Zr_{22}Ti_{18}$ Bulk Amorphous Alloy", submitted to MMI
  5. C. T. Liu, M. F. Chisholm, M. K. Miller: Intermetallics, "Oxygen impurity and microalloying effect in a Zr-based bulk metallic glass alloy", 10(2002) 1105-1112. https://doi.org/10.1016/S0966-9795(02)00131-0
  6. H. W. Kui, A. L. Greer and D. Turnbull: Applied Physics Letters, "Formation of bulk metallic glass by fluxing", 45(1984) 615-616. https://doi.org/10.1063/1.95330
  7. H. W. Kui and D. Turnbull: Applied Physics Letters, "Melting of Ni40Pd40P20 glass", 47(1985) 796-797. https://doi.org/10.1063/1.95986
  8. T. D. Shen and R. B. Schwarz: Applied Phisics Letters, "Bulk ferromagnetic glasses prepared by flux melting and water quenching", 75(1999), 796-797. https://doi.org/10.1063/1.124516
  9. S. Bossuyt et al.: Mater. Sci. Eng. A, "Electrochemical removal of oxygen for processing glass-forming alloys", 375-377(2004) 240-243. https://doi.org/10.1016/j.msea.2003.10.070
  10. L. Sun et al.: Physica, "Study on solidification behavior of Pd40Ni40P20 alloy by fluxing method", B240(1997) 205-210.
  11. S. Y. Shin et al.: Mat. Sci .For., "New Cu-based bulk metallic glasses with high strength of 2000 MPa", 945(2004) 449-452.