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:10/22/2014)... The Americas Inorganic Refrigerants Market report ... Americas with analysis and forecast of revenue. , ... Refrigerants Market report, to get an idea of ... glimpse of the segmentation in the Americas inorganic ... and figures. , http://www.micromarketmonitor.com/market/americas-inorganic-refrigerants-4191654241.html , ...
(Date:10/22/2014)... October 22, 2014 Currently offering ... A & D Weighing, Rice Lake, and Ohaus, ... Balance . The Sartorius CPA Semi-Micro Balance is ... high-quality, precise, and user-friendly laboratory balance. , Sartorius ... equipment, their laboratory balances are well known for ...
(Date:10/22/2014)... VANCOUVER , Oct. 22, 2014 /PRNewswire/ - iCo ... ICOTF), today announced next steps for its Oral ... findings from its in vitro work ... therapy.  iCo now plans to complete pre clinical ... an initial Phase 1A clinical trial, utilizing approximately ...
(Date:10/20/2014)... 2014 Mapp Biopharmaceutical,s valiant effort to ... to fight the Ebola outbreak will make the ... production of pharmaceuticals can be, according to Kalorama ... while some may be taken aback by the ... industry knowledge are well aware of the complex ...
Breaking Biology Technology:The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 2The Americas Inorganic Refrigerants Market is estimated to grow to $71.6 million by 2018 - New Report by MicroMarket Monitor 3Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 2iCo Therapeutics Announces Advancement of Oral Amphotericin B Program 3Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 2Kalorama: ZMapp Highlights Need For Faster Biopharmaceutical Production 3
... of Madison has been licensed to sell a ... agents, GenTel announced on Tuesday. , ,GenTel will market ... Kreatech Biotechnology BV of Amsterdam, under its ... are validated for use on GenTel's PATH protein microarray ...
... drive thru Illinois you now pay a premium for using cash ... device for your car. If you stop for gas at a ... plastic device on their key chain to pay for gas. These ... applications to reduce costs, improve efficiency, and potentially improve the buyers ...
... Wis. - Former Wisconsin Gov. and Secretary of ... board of directors at C.R. Bard , the ... at the company's August board meeting. , ,Bard, a ... sells specialty devices for vascular, urology, oncology and surgical ...
Cached Biology Technology:
(Date:10/17/2014)... regarding Ebola is critical and pertinent for practicing physicians ... outbreak and epidemic. The Journal, Disaster Medicine and ... Ebola Virus and Public Health, to surround the public, ... critical societal moment. , On October 17, the ... . The primer was prepared by Dr. Eric Toner, ...
(Date:10/16/2014)... wages war on the human body. Battles are ... In pancreatic cancer, this stalemate—known as tumor dormancy—can ... malignant, a phenomena that is poorly understood. ... laboratory of Salvatore Torquato, a Professor of Chemistry ... surrounding tumor dormancy and the switch to a ...
(Date:10/16/2014)... cultivated efficiently, they are anything but sustainable: environmental ... cultivation is becoming increasingly evident. Despite their disadvantages, ... are regarded as the sole possibility of achieving ... finds Bernhard Schmid, an ecology professor at the ... of agriculture and forestry. After all, a new ...
Breaking Biology News(10 mins):Modeling tumor dormancy 2Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3
... is measured to understand tree health, fluxes in carbon ... of the most essential and widely collected woody plant ... is awkward and time consuming. Scientists have developed a ... safely and accurately. Dendrometer bands are metal straps ...
... (IL-7) is an important immune messenger protein which ensures ... in our body for immune defence. Researchers from ETH ... function: it enhances the drainage function of lymphatic vessels, ... vessels into the body tissue and return it to ...
... an old dog new tricks." Now neuroscientists are beginning to ... neuroscientists have struggled to understand how the microcircuitry of the ... for the old. New findings published in the journal ... Los Angeles and the University of California, Irvine show how ...
Cached Biology News:New technique for measuring tree growth cuts down on research time 2New technique for measuring tree growth cuts down on research time 3New function for a well-known immune messenger molecule 2New function for a well-known immune messenger molecule 3Researchers discover how inhibitory neurons behave during critical periods of learning 2
... HISTAR detection systems provide linking and ... with species specific primary antibodies for ... Visualisation is accomplished using an ultra-sensitive ... polymer labelling technology. Secondary antibodies are ...
... Enzyme concentration - 5 units/µL ,• High ... yields ,• Leaves an 'A' overhang ,• ... which exhibits very high activity in primer ... ensure the quality of the enzyme, each ...
... from Thermus aquaticus expressed in E. coli; ... of 250 units enzyme/tube and Buffer I ... the same enzyme as AmpliTaq DNA Polymerase ... separation process to ensure that contaminating bacterial ...
Our original highly-purified, robust Taq Polymerase which delivers consistently high yields and minimal background...
Biology Products: