Bulk metallic glass formation in the Pd-Ni-P and Pd-Cu-P alloy systems

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Bulk metallic glasses were prepared in the Pd-Ni-P and Pd-Cu-P systems using a fluxing technique. The formation of bulk amorphous Pd-Cu-P alloys was reported here for the first time. For both alloy systems, bulk glass formation requires maintaining the phosphorus content near 20 at.%. In the Pd-Ni-P system, 10-mm diameter amorphous Pd{sub x}Ni{sub 80{minus}x}P{sub 20} rods can be formed for 25 {le} x {le} 60. In the Pd-Cu-P system, 7-mm diameter amorphous Pd{sub x}Cu{sub 80{minus}x}P{sub 20} rods can be produced for 40 {le} x {le} 60. From all the ternary alloys studied, Pd{sub 40}Ni{sub 40}P{sub 20} has the highest glass ... continued below

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17 p.

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Schwarz, R.B. & He, Y. December 11, 1996.

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  • Schwarz, R.B.
  • He, Y. Los Alamos National Lab., NM (United States). Center for Materials Science

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Bulk metallic glasses were prepared in the Pd-Ni-P and Pd-Cu-P systems using a fluxing technique. The formation of bulk amorphous Pd-Cu-P alloys was reported here for the first time. For both alloy systems, bulk glass formation requires maintaining the phosphorus content near 20 at.%. In the Pd-Ni-P system, 10-mm diameter amorphous Pd{sub x}Ni{sub 80{minus}x}P{sub 20} rods can be formed for 25 {le} x {le} 60. In the Pd-Cu-P system, 7-mm diameter amorphous Pd{sub x}Cu{sub 80{minus}x}P{sub 20} rods can be produced for 40 {le} x {le} 60. From all the ternary alloys studied, Pd{sub 40}Ni{sub 40}P{sub 20} has the highest glass formability, and 25-mm diameter amorphous cylinders, 50 mm in length, can be easily fabricated. The glass stability of the Pd-Ni-P system is wider than that of the Pd-Cu-P system. For most bulk Pd-Ni-P glasses, {Delta}T > 90 K. The {Delta}T values of bulk amorphous Pd-Cu-P alloys are considerably smaller, ranging from 27 to 73 K. The elastic constants of bulk amorphous Pd-Ni-P and Pd-Cu-P alloys were determined using a resonant ultrasound spectroscopy technique. The Pd-Ni-P glasses are slightly stiffer than the Pd-Cu-P glasses. Within each alloy system, the Young`s modulus and the bulk modulus show little change with alloy composition. Of all the bulk glass forming systems so far investigated, the ternary Pd-Ni-P system has the best glass formability. This alloy was one of the first bulk glasses discovered, yet it still remains the best in terms of glass formability. Upon replacing part of Ni by Cu, the critical cooling rates are expected to be further reduced.

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17 p.

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OSTI as DE97003389

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  • 1. international alloy conference (IAC-1), Athens (Greece), 16-21 Jun 1997

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  • Other: DE97003389
  • Report No.: LA-UR--97-125
  • Report No.: CONF-9706105--1
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/474905 | External Link
  • Office of Scientific & Technical Information Report Number: 474905
  • Archival Resource Key: ark:/67531/metadc683392

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Creation Date

  • December 11, 1996

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

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  • May 20, 2016, 2:31 p.m.

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Schwarz, R.B. & He, Y. Bulk metallic glass formation in the Pd-Ni-P and Pd-Cu-P alloy systems, report, December 11, 1996; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc683392/: accessed April 19, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.