Featured Research

from universities, journals, and other organizations

Searching for the 'perfect glass'

Date:
June 16, 2011
Source:
Carnegie Institution
Summary:
Glasses differ from crystals. Crystals are organized in repeating patterns that extend in every direction. Glasses lack this strict organization, but do sometimes demonstrate order among neighboring atoms. New research reveals the possibility of creating a metallic glass that is organized on a larger scale.

Glasses differ from crystals. Crystals are organized in repeating patterns that extend in every direction. Glasses lack this strict organization, but do sometimes demonstrate order among neighboring atoms. New research from Carnegie's Geophysical Laboratory reveals the possibility of creating a metallic glass that is organized on a larger scale. Their results are published June 17 in Science.

Scientists have discovered glasses that demonstrate order among the nearest neighboring atoms, called short-range order, and a slightly wider range of atoms, called medium-range order. Most research about finding or creating a glass with a long-range, nearly crystalline, level of order -- referred to as the perfect glass state -- has been conducted on ice and the minerals silica and zeolite. But no research into long-range order glass has been successful until now.

The research team, including Carnegie's Ho-Kwang (Dave) Mao, focused on metallic glass made from the elements cerium and aluminum. Metallic glasses are a hot research topic, because they are less brittle than ordinary glasses and more resilient than conventional metals. They combine the advantages and avoid many of the problems of normal metals and glasses, two classes of materials with a very wide range of potential applications.

By placing the cerium-aluminum glass under 25 gigapascals of pressure--about 250,000 times normal atmospheric pressure--the team was able to create a single crystal. When the glass was brought back to ambient pressure, the new structural order was preserved.

Using x-ray techniques and simulations, the team determined that the atomic structures of cerium and aluminum prevent the glass from assuming the highly ordered state at normal pressures. But under the intense 25 gigapascals, an electron in cerium shifts, allowing the crystalline structure to be created.

"These exciting results demonstrate that pressurized cerium-aluminum glass could be a favorable system for discovering the long-sought-after perfect glass," Mao said. "This situation could also exist in other metallic glasses."

Funding for this research was provided by the U.S. Department of Energy Energy Frontier Research Center, The use of HPCAT, APS is supported by Carnegie Institution for Science, Carnegie DOE Alliance Center, University of Nevada at Las Vegas and Lawrence Livermore National Laboratory through funding from DOE-National Nuclear Security Administration, DOE-Basic Energy Sciences, and NSF. The TEM measurements were conducted at the Electron Microscopy Center at ANL. Computational work was supported by NSF and conducted on the supercomputing system supported by the Center for Computational Materials Science, Tohoku University. The SLAC effort is supported by DOE. Researchers from Zhejiang University were supported by the National Science Foundation of China, the China Postdoctoral Science Foundation, the Zhejiang University-Helmholtz Cooperation Fund, the Ministry of Education of China, and Zhejiang Provincial Department of Science and Technology.


Story Source:

The above story is based on materials provided by Carnegie Institution. Note: Materials may be edited for content and length.


Journal Reference:

  1. [edit] Qiaoshi Zeng, Hongwei Sheng, Yang Ding, Lin Wang, Wenge Yang, Jian-Zhong Jiang, Wendy L. Mao, and Ho-Kwang Mao. Long-Range Topological Order in Metallic Glass. Science, 2011; 332 (6036): 1404-1406 DOI: 10.1126/science.1200324

Cite This Page:

Carnegie Institution. "Searching for the 'perfect glass'." ScienceDaily. ScienceDaily, 16 June 2011. <www.sciencedaily.com/releases/2011/06/110616142714.htm>.
Carnegie Institution. (2011, June 16). Searching for the 'perfect glass'. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/2011/06/110616142714.htm
Carnegie Institution. "Searching for the 'perfect glass'." ScienceDaily. www.sciencedaily.com/releases/2011/06/110616142714.htm (accessed September 22, 2014).

Share This



More Matter & Energy News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Thousands March in NYC Over Climate Change

Thousands March in NYC Over Climate Change

AP (Sep. 21, 2014) — Accompanied by drumbeats, wearing costumes and carrying signs, thousands of demonstrators filled the streets of Manhattan and other cities around the world on Sunday to urge policy makers to take action on climate change. (Sept. 21) Video provided by AP
Powered by NewsLook.com
What This MIT Sensor Could Mean For The Future Of Robotics

What This MIT Sensor Could Mean For The Future Of Robotics

Newsy (Sep. 20, 2014) — MIT researchers developed a light-based sensor that gives robots 100 times the sensitivity of a human finger, allowing for "unprecedented dexterity." Video provided by Newsy
Powered by NewsLook.com
MIT BioSuit A New Take On Traditional Spacesuits

MIT BioSuit A New Take On Traditional Spacesuits

Newsy (Sep. 19, 2014) — The MIT BioSuit could be an alternative to big, bulky traditional spacesuits, but the concept needs some work. Video provided by Newsy
Powered by NewsLook.com
New Music With Recycled Instruments at Colombia Fest

New Music With Recycled Instruments at Colombia Fest

AFP (Sep. 19, 2014) — Jars, bottles, caps and even a pizza box, recovered from the trash, were the elements used by four musical groups at the "RSFEST2014 Sonorities Recycling Festival", in Colombian city of Cali. Duration: 00:49 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins