Navigation Links
Building better structural materials
Date:12/13/2012

Washington, D.C. When materials are stressed, they eventually change shape. Initially these changes are elastic, and reverse when the stress is relieved. When the material's strength is exceeded, the changes become permanent. This could result in the material breaking or shattering, but it could also re-shape the material, such as a hammer denting a piece of metal. Understanding this last group of changes is the focus of research from a team including Carnegie's Ho-kwang "Dave" Mao.

Their breakthrough research on the behavior nickel nanocrystals under intense pressure is published December 14 by Science. Their findings could help physicists and engineers create stronger, longer-lasting materials. It can also help earth scientists understand tectonic events and seismicity.

It is believed that permanent changes to metallic grains when under pressure are associated with the movement of structural irregularities in the grains, called dislocations. But the deformation of nanocrystalline materials has been controversial because it was thought that below a certain grain size, the structural irregularities would not form and the deformation would be dictated by motions of the boundary between grains instead. According to computer analysis, this critical limit would occur in nanocrystals at sizes between 10 and 30 nm in size.

Experimental work on nanocrystals under pressure has been limited by technical hurdles. But new capabilities using a technique called radial diamond anvil cell x-ray diffraction has opened the door to moving beyond computer modeling and into the lab.

The team, led by Bin Chen of the Lawrence Berkeley National Laboratory, was able to show that the activities of the structural irregularities that accompany deformation were occurring even in nickel nanocrystals of 3 nanometers in size when they were compressed to higher than 183,000 times normal atmospheric pressure (18.5 gigapascals). This demonstrates
'/>"/>

Contact: Ho-kwang Dave Mao
hmao@ciw.edu
202-478-8935
Carnegie Institution
Source:Eurekalert

Page: 1 2

Related biology technology :

1. HealthTech Capital Announces Awards for the HealthTech Conference 2012 - Building a Business in the New HealthTech Ecosystem
2. Building Wireless Solution More Important than Ever with New Tablets
3. New Study Building Framework to Bring Personalized Medicine to the Clinic
4. Arteriocyte Takes the Lead in Promoting Building Future Pipeline of Women in STEM Career Fields
5. Biobetters in Key Markets - Opportunities for Biotechnology Companies to Sustain Innovation with Low Risk and High Value Offerings
6. A better brain implant: Slim electrode cozies up to single neurons
7. Sitting still or going hunting: Which works better?
8. UMass Amherst, Harvard experts say better systems needed for medical device cybersecurity
9. Breathe Better With Clarity Allergy Center
10. Penn researchers study of phase change materials could lead to better computer memory
11. New research could mean faster computers and better mobile phones
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/18/2014)... TORONTO , Aug. 18, 2014 /PRNewswire/ - SQI Diagnostics ... and commercializes proprietary technologies and products for advanced microarray ... call on Friday, August 22 at 2:00 pm ET.  ... , CEO, will provide a brief review of SQI,s ... Pronovost , a diagnostics industry veteran recently appointed to ...
(Date:8/18/2014)... , August 18, 2014 ... Transparency Market Research "Life Science Reagents Market(Products- PCR ... Electrophoresis, Chromatography, In-Vitro Diagnostic Reagents and Others; End ... Institutions, Clinical Laboratories, and Forensic Laboratories)- Global Industry ... - 2019", the global life science reagents market ...
(Date:8/18/2014)... , 18. August 2014 ... in eine internationale klinische Studie auf, in ... Die Linse soll das Sehvermögen bei allen ... der Operation möglicherweise keine Lese- oder Gleitsichtbrille ... dem Namen FluidVision Accommodating Intraocular Lens ...
(Date:8/15/2014)... FOREST, Ill. , Aug. 15, 2014   ... world,s leading provider of injectable drugs and infusion technologies, ... Morgan Stanley Global Healthcare Conference on Tuesday, Sept. 9, ... The presentation is scheduled to begin at 11:45 ... will be available to all interested parties through a ...
Breaking Biology Technology:SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 2SQI Diagnostics Announces Investor Conference Call with Dr. Allan Pronovost 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 2Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 3Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 4Global Life Science Reagents Market Expected to Reach USD 25.7 Billion in 2019: Transparency Market Research 5Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 2Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 3Implantation einer revolutionären akkommodativen Linse bei Katarakt-Patienten in deutschen Augenzentren im Rahmen einer internationalen klinischen Studie 4
... YORK, April 17 The market for congestive ... billion in 2007, and is,expected to reach $30 ... by,Kalorama Information, Congestive Heart Failure: Major World Markets, ... three factors: an,increased incidence of CHF, the application ...
... JENA, Germany, April 17 Occlutech GmbH, the leading,European ... a recent news release., In a news release ... opinion from AIPPI the European "Association for the Protection,of ... of,certain European IP held by AGA Medical., AIPPI ...
... April 17 BioMed Realty Trust, Inc.,(NYSE: BMR ... of 5,700,000,shares of common stock at $25.50 per share. ... 22, 2008. Gross proceeds from the offering will be,approximately ... of the,offering to repay a portion of the outstanding ...
Cached Biology Technology:Genomics Likely to Replace Traditional Drug Therapies in Treating CHF 2Occlutech Clarifies Statement Regarding Favourable Opinion Obtained From AIPPI With Regard to Patents Held by AGA Medical 2BioMed Realty Trust Prices Public Offering of 5,700,000 Shares of Common Stock 2BioMed Realty Trust Prices Public Offering of 5,700,000 Shares of Common Stock 3
(Date:8/19/2014)... to encourage healthier spending habits? A new study by ... by tracking the purchasing records in a supermarket chain ... nutritional value of foods for sale. , The researchers, ... and Brian Wansink PhD, author of Slim by Design ... Supermarkets in the Northeastern United States between January 2005 ...
(Date:8/19/2014)... the world, leprosy and tuberculosis live side-by-side. Worldwide ... per year, with nearly all of them occurring ... vaccine Bacille Calmette-Guerin, or BCG, provides only partial ... more potent vaccine is needed to combat both ... weapon against both diseases., In a study published ...
(Date:8/19/2014)... (Boston) Some infants born with neonatal abstinence ... a more difficult time going through withdrawal than ... understood. While genetic and epigenetic (when genes are ... identified as potential factors, researchers at Boston University ... (BMC) conducted a first of its kind study ...
Breaking Biology News(10 mins):New vaccine shows promise as stronger weapon against both tuberculosis and leprosy 2In-utero methadone, Subutex exposure could alter gene expression, cause severe Neonatal Abstience Syndrome 2
... American scientists have rediscovered a highly distinctive mammal C a ... years ago. Furthermore, it has never before been discovered in ... extinct. , The greater dwarf cloud rat (Carpomys melanurus) has ... eyes, small rounded ears, a broad and blunt snout, and ...
... throughout the sciences in the study of biological, technological, ... to visualize or understand. In a May 1 ... links in networks, Santa Fe Institute (SFI) researchers Aaron ... real-world networks can be understood as a hierarchy of ...
... Iowa and HOUSTON, Texas The first year ... at Iowa State University (ISU) has supported 26 ... to further diversify Americas sources of energy and ... third-largest integrated energy company in the United States, ...
Cached Biology News:Dwarf cloud rat rediscovered after 112 years 2Dwarf cloud rat rediscovered after 112 years 3Nature paper describes technique for extracting hierarchical structure of networks 2Iowa State-ConocoPhillips collaboration advances 26 research projects in first year 2
Whole blood is collected from healthy pigs (mixed breed, either sex) at the time of slaughter, refrigerated within 6 hours, processed within 24 hours and frozen at -20ºC....
... Rhesus Serum • Rhesus serum is collected ... 5-7 years of age. Available Anticoagulants: ... Heparin (Na) N-06: K2EDTA N-08: ... N-03: Alsevers N-05: ACD ...
Reacts with MBP from human, bovine and rat, epitope 129-138. Reacts weakly with rabbit. Does not react with guinea pig....
... DCTD_HUMAN GI Number: 4503277 ... Description: FUNCTION: Supplies the nucleotide ... dCMP + H 2 O = ... Homohexamer. SIMILARITY: Belongs to the Diseases: ...
Biology Products: