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Title: Atomistic Theory of Metallic Liquids and Glasses

Abstract

Bulk Metallic Glasses explores an emerging field of materials known as bulk metallic glasses. It summarizes the rapid development of these materials over the last decade and includes documentation on diverse applications of bulk metallic glasses; from structural applications to microcomponents. Some of the applications covered are pressure sensors, microgears for motors, magnetic cores for power supplies, and nano-dies for replacing next generation DVDs. The chapters cover current theories and recent research including an atomistic theory of local topological fluctuations, atomistic simulations, and unique microstructures of these amorphous materials. Other topics include glass formation, glass forming ability, and the underlying mechanisms and physical insights of these criteria. The mechanical deformation of bulk metallic glasses, fatigue, fracture, and corrosion behaviors of these materials are also reviewed.

Authors:
 [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
932038
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Book
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CORROSION; DEFORMATION; DOCUMENTATION; FLUCTUATIONS; GLASS; MAGNETIC CORES; METALLIC GLASSES; MOTORS; POWER SUPPLIES

Citation Formats

Egami, Takeshi. Atomistic Theory of Metallic Liquids and Glasses. United States: N. p., 2007. Web.
Egami, Takeshi. Atomistic Theory of Metallic Liquids and Glasses. United States.
Egami, Takeshi. Mon . "Atomistic Theory of Metallic Liquids and Glasses". United States. doi:.
@article{osti_932038,
title = {Atomistic Theory of Metallic Liquids and Glasses},
author = {Egami, Takeshi},
abstractNote = {Bulk Metallic Glasses explores an emerging field of materials known as bulk metallic glasses. It summarizes the rapid development of these materials over the last decade and includes documentation on diverse applications of bulk metallic glasses; from structural applications to microcomponents. Some of the applications covered are pressure sensors, microgears for motors, magnetic cores for power supplies, and nano-dies for replacing next generation DVDs. The chapters cover current theories and recent research including an atomistic theory of local topological fluctuations, atomistic simulations, and unique microstructures of these amorphous materials. Other topics include glass formation, glass forming ability, and the underlying mechanisms and physical insights of these criteria. The mechanical deformation of bulk metallic glasses, fatigue, fracture, and corrosion behaviors of these materials are also reviewed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Book:
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  • Abstract not provided.
  • A study on the susceptibility of various iron-cobalt-boron-silicon metallic glasses to stress-corrosion cracking has been conducted. Testing was carried out on thin metallic ribbons of Fe{sub 78}B{sub 13}Si{sub 9}, Fe{sub 66}Co{sub 18}B{sub 15}Si{sub 1}, Co{sub 66}Fe{sub 4}Ni{sub 1}B{sub 14}Si{sub 15}, Co{sub 76}Fe{sub 2}Mn{sub 4}B{sub 12}Si{sub 6}, and Co{sub 69}Fe{sub 4}Ni{sub 1}MO{sub 2}B{sub 12} Si{sub 12} in 0%, 25%, 50%, 75%, and 100% hydrochloric acids solutions at room temperature. The tests were performed under constant-strain conditions in the various solutions until complete separation of the ribbons occurred. Typical fractographic techniques were used for analyzing the failure of the glasses. The resultsmore » indicated that the susceptibility of the glasses Fe{sub 78}B{sub 13}Si{sub 9}, Fe{sub 66}Co{sub 18}B{sub 15}Si{sub 1}, Co{sub 76}Fe{sub 2}Mn{sub 4}B{sub 12}Si{sub 6} and samples of Co{sub 66}Fe{sub 4} NiB{sub 14}Si{sub 15} glass to stress-corrosion cracking varies only as a function of the amplitude of the strain, Susceptibility is independent of the solution concentration. It is found that the additions of Ni, Mn, Mo and high content of Co into the Fe-Co-B-Si glass enhance the resistance of the alloy against stress-corrosion cracking in HCl solution. On contrary, the results showed that Co{sub 69}Fe{sub 4}Ni{sub 1}Mo{sub 2}B{sub 12}Si{sub 12} glass is not susceptible to stress-corrosion cracking in HCl solutions.« less
  • Vitrification by joule-heating requires suitable electrode materials. Molybdenum electrodes are used often in high temperature ({approximately} 1,500 C) joule-heated melters producing commercial glass while Inconel 690 has been the material of choice for lower temperature ({approximately} 1,150 C) high-level nuclear waste vitrification. Vitrification of diverse waste streams at higher-temperatures places increasingly severe demands upon the electrode materials. Some commercially available ceramics possess sufficient conductivity at high temperatures to be used as electrodes. Many mixed and low-level waste vitrification applications involve significant amounts of reducible species that accelerate the corrosion process for metallic electrodes. In addition, the corrosion rate of allmore » electrode materials depends on the electrode current density. A special test rig was designed that measures the dependence of corrosion rate on both current density and temperature over extended periods of time, Molybdenum, Inconel 690, and three types of commercial ceramic coupons were tested over a range of conditions in simulated waste glasses containing key reducible species (e.g., PbO, CuO, ZnO, SO{sub 3}). The corrosion rates show strong dependencies on the current density. Coupons were sectioned and the glass-coupon interface examined using Scanning Electron Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS). Cu, Pb, Ni and Sn were found to be reduced to their metallic states at the molybdenum coupon surfaces and were active in the corrosion process.« less
  • Bulk Metallic Glasses explores an emerging field of materials known as bulk metallic glasses. It summarizes the rapid development of these materials over the last decade and includes documentation on diverse applications of bulk metallic glasses; from structural applications to microcomponents. Some of the applications covered are pressure sensors, microgears for motors, magnetic cores for power supplies, and nano-dies for replacing next generation DVDs. The chapters cover current theories and recent research including an atomistic theory of local topological fluctuations, atomistic simulations, and unique microstructures of these amorphous materials. Other topics include glass formation, glass forming ability, and the underlyingmore » mechanisms and physical insights of these criteria. The mechanical deformation of bulk metallic glasses, fatigue, fracture, and corrosion behaviors of these materials are also reviewed.« less