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Title: Formation and Applications of Bulk Glassy Alloys in Late Transition Metal Base System

Abstract

This paper reviews our recent results of the formation, fundamental properties, workability and applications of late transition metal (LTM) base bulk glassy alloys (BGAs) developed since 1995. The BGAs were obtained in Fe-(Al,Ga)-(P,C,B,Si), Fe-(Cr,Mo)-(C,B), Fe-(Zr,Hf,Nb,Ta)-B, Fe-Ln-B(Ln=lanthanide metal), Fe-B-Si-Nb and Fe-Nd-Al for Fe-based alloys, Co-(Ta,Mo)-B and Co-B-Si-Nb for Co-based alloys, Ni-Nb-(Ti,Zr)-(Co,Ni) for Ni-based alloys, and Cu-Ti-(Zr,Hf), Cu-Al-(Zr,Hf), Cu-Ti-(Zr,Hf)-(Ni,Co) and Cu-Al-(Zr,Hf)-(Ag,Pd) for Cu-based alloys. These BGAs exhibit useful properties of high mechanical strength, large elastic elongation and high corrosion resistance. In addition, Fe- and Co-based glassy alloys have good soft magnetic properties which cannot be obtained for amorphous and crystalline type magnetic alloys. The Fe- and Ni-based BGAs have already been used in some application fields. These LTM base BGAs are promising as new metallic engineering materials.

Authors:
;  [1]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
Publication Date:
OSTI Identifier:
20798659
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 832; Journal Issue: 1; Conference: 2. international conference on flow dynamics, Sendai (Japan), 16-18 Nov 2005; Other Information: DOI: 10.1063/1.2204458; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; COBALT ALLOYS; COPPER BASE ALLOYS; CORROSION RESISTANCE; ELASTICITY; FERROMAGNETIC MATERIALS; IRON ALLOYS; MAGNETIC PROPERTIES; METALLIC GLASSES; NICKEL ALLOYS; RARE EARTHS; REVIEWS; TRANSITION ELEMENTS

Citation Formats

Inoue, Akihisa, and Shen Baolong. Formation and Applications of Bulk Glassy Alloys in Late Transition Metal Base System. United States: N. p., 2006. Web. doi:10.1063/1.2204458.
Inoue, Akihisa, & Shen Baolong. Formation and Applications of Bulk Glassy Alloys in Late Transition Metal Base System. United States. doi:10.1063/1.2204458.
Inoue, Akihisa, and Shen Baolong. Fri . "Formation and Applications of Bulk Glassy Alloys in Late Transition Metal Base System". United States. doi:10.1063/1.2204458.
@article{osti_20798659,
title = {Formation and Applications of Bulk Glassy Alloys in Late Transition Metal Base System},
author = {Inoue, Akihisa and Shen Baolong},
abstractNote = {This paper reviews our recent results of the formation, fundamental properties, workability and applications of late transition metal (LTM) base bulk glassy alloys (BGAs) developed since 1995. The BGAs were obtained in Fe-(Al,Ga)-(P,C,B,Si), Fe-(Cr,Mo)-(C,B), Fe-(Zr,Hf,Nb,Ta)-B, Fe-Ln-B(Ln=lanthanide metal), Fe-B-Si-Nb and Fe-Nd-Al for Fe-based alloys, Co-(Ta,Mo)-B and Co-B-Si-Nb for Co-based alloys, Ni-Nb-(Ti,Zr)-(Co,Ni) for Ni-based alloys, and Cu-Ti-(Zr,Hf), Cu-Al-(Zr,Hf), Cu-Ti-(Zr,Hf)-(Ni,Co) and Cu-Al-(Zr,Hf)-(Ag,Pd) for Cu-based alloys. These BGAs exhibit useful properties of high mechanical strength, large elastic elongation and high corrosion resistance. In addition, Fe- and Co-based glassy alloys have good soft magnetic properties which cannot be obtained for amorphous and crystalline type magnetic alloys. The Fe- and Ni-based BGAs have already been used in some application fields. These LTM base BGAs are promising as new metallic engineering materials.},
doi = {10.1063/1.2204458},
journal = {AIP Conference Proceedings},
number = 1,
volume = 832,
place = {United States},
year = {Fri May 05 00:00:00 EDT 2006},
month = {Fri May 05 00:00:00 EDT 2006}
}
  • Hydrogen is used as a probe for obtaining structural information on metallic glasses. Results from experimental radial distribution functions of hydrided and unhydrided Zr/sub 3/Rh and Zr/sub 2/Pd glasses show a significant change in the nearest-neighbor distance of Zr atoms. The measured distance suggests that hydrogen occupies mainly tetrahedral sites defined by four Zr atoms under normal hydriding conditions (1 atm H/sub 2/, approx.200 /sup 0/C). A statistical model for these sites based on current dense-random-packing models is in good agreement with the observed absorption capacity for hydrogen. We predict that H-H interaction should limit the upper value of hydrogenmore » content in Zr-based glasses to 2.5 (H/metal atom).« less
  • New bulk amorphous alloys exhibiting a wide supercooled liquid region before crystallization were found in Fe{endash}(Co,Ni){endash}(Zr,Nb,Ta){endash}(Mo,W){endash}B systems. The T{sub g} is as high as about 870 K and the supercooled liquid region reaches 88 K. The high thermal stability of the supercooled liquid enabled the production of bulk amorphous alloys with diameters up to 6 mm. These bulk amorphous alloys exhibit a high compressive strength of 3800 MPa, high Vickers hardness of 1360, and high corrosion resistance. Besides, the amorphous alloys exhibit a high magnetic-flux density of 0.74{endash}0.96 T, low coercivity of 1.1{endash}3.2 A/m, high permeability exceeding 1.2{times}10{sup 4} atmore » 1 kHz, and low magnetostriction of about 12{times}10{sup {minus}6}. {copyright} {ital 1997 American Institute of Physics.}« less
  • The heats of formation, {Delta}{ital H}, of the ordered phases of Pt-Ti are calculated using various approximations. This alloy system was chosen because of the availability of experimental data for {Delta}{ital H} for both high- and low-symmetry phases. The difference in the calculated heats of formation between a muffin-tin and a full-potential treatment can be substantial, as much as 0.25 eV/atom. While the total energies of the compounds and the reference elemental metals are all lowered (i.e., increased in binding), the change in {Delta}{ital H} depends on which energy is lowered more. For PtTi in the high-symmetry CsCl structure, {Delta}{italmore » H} is reduced, implying that the decrease of the total energy due to the full potential is larger for the elemental reference solids than for the compound. The calculated heats of formation are in accord with the experimental values and the known phase-diagram behavior, i.e., all the low-temperature phases predicted to occur as a function of composition are in fact observed.« less
  • A ground-state search of a generalized, many-body Ising Hamiltonian whose interaction energies are determined from first-principles local-density calculations reveals that Pt{ital X} intermetallics for {ital X}=Ni, Cu, Rh, and Pd will form stable {ital ordered} structures at low temperatures. In contrast, {ital d}-band tight-binding models universally predict phase separation in all late-transition-metal alloys. It is shown that the previously neglected {ital s}-electron cohesion is responsible for this phase stability.