Latest Amorphous metal Stories

2009-03-16 15:54:54

Using rigorous computer calculations, researchers from Carnegie Mellon University and the Carnegie Institution of Washington have established evidence that supercooled silicon experiences a liquid-liquid phase transition, where at a certain temperature two different states of liquid silicon exist. The two states each have unique properties that could be used to develop new silicon-based materials. Furthermore, the methods developed can be applied to gain a better understanding of other...

2008-12-22 14:44:34

New understanding could lead to significant new materials Researchers at MIT have made significant progress in understanding a class of materials that has resisted analysis for decades. Their findings could lead to the rapid discovery of a variety of useful new kinds of glass made of metallic alloys with potentially significant mechanical, chemical and magnetic applications. The first examples of metallic alloys that could be made into glass were discovered back in the late 1950s and led to a...

2008-12-21 12:32:21

The new alloys are lighter and less expensive, but are still tough and ductile enough for use in aerospace applications Scientists from the California Institute of Technology (Caltech) have created a range of structural metallic-glass composites, based in titanium, that are lighter and less expensive than any the group had previously created, while still maintaining their toughness and ductility--the ability to be deformed without breaking. A paper describing these breakthrough metallic-glass...

2008-08-03 03:00:20

By Gao, Michael C Dogan, Omer N; King, Paul; Rollett, Anthony D; Widom, Michael The purpose of this work is to predict elastic and thermodynantie properties of chromium-based alloys based on first-principles calculations and to demonstrate an appropriate computational approach to develop new materials for high-temperature applications in energy systems. In this study, Poisson ratio is used as a screening parameter to identify ductilizing additives to the refractory alloys. The results...

2008-07-24 03:00:55

By Lee, Kyuhong Lee, Sang-Bok; Lee, Sang-Kwan; Lee, Sunghak In the present study, a Zr-based amorphous alloy matrix composite reinforced with tungsten continuous fibers was fabricated without pores or defects by a liquid pressing process; the microstructures and mechanical properties of the fibers were investigated. Approximately 60 vol pct of the fibers was distributed inside the amorphous matrix, although the matrix of the composite also contained a small number of polygonal crystalline...

2008-07-17 03:00:35

By Lee, Sang-Bok Lee, Sang-Kwan; Lee, Sunghak; Kim, Nack J The feasibility to fabricate the tungsten and STS-fiber- reinforced amorphous alloy matrix composites was verified by analyses of the thermal stress and cooling behavior between matrix and metallic fibers. Approximately 50 to 65 vol pct of fibers were homogeneously distributed inside the amorphous matrix, although the matrix of the STS-fiber-reinforced composite contained a small amount of crystalline phases. The compressive test...

2008-06-23 10:15:00

Imagine a plane that has wings made out of glass; thanks to a major breakthrough in understanding the nature of glass by scientists at the University of Bristol, this has just become a possibility. Despite its solid appearance, glass is actually a 'jammed' state of matter that moves very slowly. Like cars in a traffic jam, atoms in a glass can't reach their destination because the route is blocked by their neighbors, so it never quite becomes a 'proper' solid. For more than 50 years most...

Word of the Day
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.