Navigation Links
Caltech-led team creates damage-tolerant metallic glass
Date:1/12/2011

em. In the new palladium alloy, so many shear bands form when the material is put under stress that it "actually leads to higher toughness, because the bands interact and form networks that block crack propagation," Demetriou explains. In other words, the number of shear bands that form, intersect, and multiply at the tip of an evolved crack is so high that the crack is blocked and cannot travel very far. In essence, then, the shear bands act as a shield, preventing shattering. Thus, the palladium glass acts very much like the toughest of steels, using an analogous blocking mechanism of arresting cracks.

"And," Demetriou adds, "this high toughness does not come at the expense of strength. This material has both strength and toughness, which is why it falls so far outside what's previously been possible. That's why this material is so special."

The palladium alloy described in the paper could soon be of use in biomedical implants, says Demetriou. "One example is dental implants," Demetriou says. "Many noble-metal alloys, including palladium, are currently used in dentistry due to their chemical inertness and resistance to oxidation, tarnish, and corrosion. Owing to its superior damage tolerance, the present palladium glass can be thought of as a superior alternative to conventional palladium dental alloys. Plus, the absence of any elements considered toxic or allergenicnickel, copper, aluminumfrom the composition of this alloy will likely promote good biological compatibility."

The class of such tough metallic glasses potentially could be used in other structural applications like automotive and aerospace components, the team says. But this particular alloy is unlikely to be part of any large-scale manufacturing process. "It's prohibitively expensive," says Demetriou. "The cost is much too high for any large-scale, widespread use."

Still, he notes, the fact that it was created at all, with these particular properties, tells scienti
'/>"/>

Contact: Deborah Williams-Hedges
debwms@caltech.edu
626-395-3227
California Institute of Technology
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Caltech-led researchers find negative cues from appearance alone matter for real elections
2. Caltech-led team provides proof in humans of RNA interference using targeted nanoparticles
3. East-African human ancestors lived in hot environments, says Caltech-led team
4. NIH awards $11.5 million for new Caltech-led membrane-protein center
5. Early-stage gene transcription creates access to DNA
6. MIT creates tiny backpacks for cells
7. Florida professor creates endowment for insect scientists
8. Crustacean shell with polyester creates mixed-fiber material for nerve repair
9. NYSCF Fellow lead author on study that creates blood vessel cells from stem cells
10. $15 million stimulus award creates national consortium for revealing scientific resources
11. Antarctica glacier retreat creates new carbon dioxide store
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Caltech-led team creates damage-tolerant metallic glass
(Date:9/18/2014)... found clownfish larvae can swim up to 400 kilometres in ... cope with environmental change. , Clownfish spend their entire adult ... babies they must wander the open ocean, says study co-author, ... Coral Reef Studies (Coral CoE) at James Cook University. , ... now we,ve been given a rare glimpse into how far ...
(Date:9/17/2014)... UCLA atmospheric scientists were instrumental in the creation of ... tool to classify the fire threat potential of the ... a spark into an inferno. The index was introduced ... with UCLA and San Diego Gas and Electric. , ... to "extreme" that will be used to help fire ...
(Date:9/17/2014)... EC-FP5 four-year project, delivering its first release in 2004. ... in several EC projects, as a part of the ... BON), to increase the general awareness of the work ... dissemination of the Fauna Europaea results, the ... e-Publishing tools to prepare data papers for all 56 ...
Breaking Biology News(10 mins):Nemo's epic journey to find a new home 2UCLA scientists play key role in developing new Santa Ana Wildfire Threat Index 2Contributions on Fauna Europaea: Data papers as innovative model on expert involvement 2
... Leader, in One-Time Passwords for Highest Ability to Execute and ... RSA, The Security Division of EMC (NYSE: EMC ... An Overview and Competitive Analysis for the One Time ... in one-time password (OTP) technology for strong authentication based upon ...
... LA JOLLA, CA, June 19, 2009Researchers at The ... and Ohio State University have used a very sensitive ... to exist in one "natural" three-dimensional structure (shape), can ... the protein,s chemical environment. One folded form is active ...
... of nanomaterials with enhanced performance characteristics for use in ... people coming into direct contact with these materials. ... the market including clothes, skin lotions and cleaning ... and therapeutic nanocarriers have been designed for targeted drug ...
Cached Biology News:RSA Designated as the Leader in One-Time Password Market by Frost & Sullivan 2RSA Designated as the Leader in One-Time Password Market by Frost & Sullivan 3RSA Designated as the Leader in One-Time Password Market by Frost & Sullivan 4Researchers observe single protein dimers wavering between two symmetrically opposed structures 2Researchers observe single protein dimers wavering between two symmetrically opposed structures 3Researchers observe single protein dimers wavering between two symmetrically opposed structures 4Research explores interactions between nanomaterials, biological systems 2Research explores interactions between nanomaterials, biological systems 3Research explores interactions between nanomaterials, biological systems 4
(Date:9/19/2014)... Scientists at NYU Langone Medical Center have found ... the process for turning adult cells into so-called pluripotent ... C. Using the new technique in mice, the researchers ... skin cells by more than 20-fold compared with the ... reliable, and thus should generally accelerate research aimed at ...
(Date:9/19/2014)... 19, 2014  Nektar Therapeutics (NASDAQ: ... characterizing the analgesic profiles of a series of ... agonist molecules. The preclinical research candidates were created ... The analgesic properties of kappa receptor ... 1,2 Kappa opioid receptors are expressed in ...
(Date:9/19/2014)... 19, 2014 ... ) has announced the addition of the  "Micro ... to their offering.       (Logo: http://photos.prnewswire.com/prnh/20130307/600769) ... of the fastest-growing segments in the chromatography market. ... 2013, and expected to reach $2.0 billion by ...
(Date:9/18/2014)... About POCT POCT, ... clinical laboratory. It helps in making fast clinical ... medication. POCT is gaining popularity due to the ... as diabetes, heart disease, and obesity. It is ... to minimize errors during the diagnosis of patients. ...
Breaking Biology Technology:NYU Langone scientists report reliable and highly efficient method for making stem cells 2NYU Langone scientists report reliable and highly efficient method for making stem cells 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 5Micro Market Monitor : Global Pre-packed Chromatography Columns 2POCT Market in China 2014-2018 2
... (NPWH) Encourages Women to Get Informed and Ask ... growing awareness of HPV,(human papillomavirus), the primary cause of ... of Nurse Practitioners in Women,s,Health (NPWH) found that many ... prevent the disease. Despite the fact that there is ...
... Inc.,(Nasdaq: OSTE ), a leader in the emerging ... total revenue for the year,ending December 31, 2007 increased ... year ended December 31, 2006. Revenue from "core" product,lines, ... year,2007, an increase of 15% over core product revenue ...
... still flawed government-wide plan for nanotechnology risk research ... Federally-funded studies essential to managing possible risks from ... top-down strategy tied to projected commercialization, expected human ... , The National Nanotechnology Initiatives (NNI) ...
Cached Biology Technology:Survey Shows Most Women Can't Separate Fact From Fiction When It Comes to Cervical Cancer Prevention 2Survey Shows Most Women Can't Separate Fact From Fiction When It Comes to Cervical Cancer Prevention 3Survey Shows Most Women Can't Separate Fact From Fiction When It Comes to Cervical Cancer Prevention 4Osteotech Reports 2007 Full Year and Fourth Quarter Financial Results; Full Year Revenue of $104.3 Million Exceeds $100 Million Milestone; Diluted Earnings Per Share Was $.15 in 2007 2Osteotech Reports 2007 Full Year and Fourth Quarter Financial Results; Full Year Revenue of $104.3 Million Exceeds $100 Million Milestone; Diluted Earnings Per Share Was $.15 in 2007 3Osteotech Reports 2007 Full Year and Fourth Quarter Financial Results; Full Year Revenue of $104.3 Million Exceeds $100 Million Milestone; Diluted Earnings Per Share Was $.15 in 2007 4Osteotech Reports 2007 Full Year and Fourth Quarter Financial Results; Full Year Revenue of $104.3 Million Exceeds $100 Million Milestone; Diluted Earnings Per Share Was $.15 in 2007 5Osteotech Reports 2007 Full Year and Fourth Quarter Financial Results; Full Year Revenue of $104.3 Million Exceeds $100 Million Milestone; Diluted Earnings Per Share Was $.15 in 2007 6Federal nanotech risk research plan still comes up short 2
... functional protein microarray is the first microarray ... interactions on a proteome scale. The Yeast ... frames (ORFs) expressed as 5'-GST fusions, purified ... inch x 3 inch nitrocellulose-coated slide. With ...
... Useful for the mechanical harvesting of cells ... ensures even contact with the growth surface ... 75cm flasks • Individually wrapped • Sterilized ... This CLS number is a new product ...
... description: Designed for use with dishes and ... is a new product number, created to ... no availability yet, please order under the ... service for assistance. Comp Dim: blade L ...
... combine the proven features of the pET, ... provides all of the benefits and versatility ... backbone. The pTriEx vectors have been extensively ... in all three expression systems. In each ...
Biology Products: