An impossible alloy now possible

Feb 26, 2009

What has been impossible has now been shown to be possible - an alloy between two incompatible elements. The findings are being published in this week's edition of Proceedings of the National Academy of Science, USA.

A research team led by Professor H.K. Mao from Carnegie Institution of Washington and Professor Rajeev Ahuja from UU have used high pressure experiments and theoretical calculations to study the behaviour of Ce3Al under high pressure.

"We were surprised to find that Cerium and Aluminium formed a so called substitutional alloy under high pressure. Forming these alloys has been limited to elements close in atomic radii and electronegativity up until now", sais Professor Rajeev Ahuja of Uppsala University.

The difference in radii and electronegativity of Cerium and Aluminium was diminished by applying pressure. Both synchrotron X-ray diffraction and ab initio calculations showed the same cause for bringing the two elements closer in radii and electronegativity, resulting in the new alloy phase. After the release of pressure the substitutional alloy still remained.

"This discovery opens up the possibility for finding new alloys with other ratios between Cerium and Aluminium, as well as alloys with Cerium and other incompatible elements. These new alloys may possess interesting and useful mechanical, electronic, and magnetic properties".

The new findings have been made possible by the recent development of high pressure diamond anvil cell and synchrotron radiation techniques. The extensive simulations were performed at Uppsala University's Multidisciplinary Center for Advanced Computational Science (UPPMAX).

More information: Read the article on PNAS website.

Source: Uppsala University

Explore further: Technique simplifies the creation of high-tech crystals

add to favorites email to friend print save as pdf

Related Stories

ISS 'space truck' launch postponed: Arianespace

1 hour ago

The July 24 launch of a robot ship to deliver provisions to the International Space Station has been postponed "for a few days", space transport firm Arianespace said Friday.

Bible museum planned for US capital

2 hours ago

The devout Christian family that upended a part of President Barack Obama's health care law aims to open a Bible museum in Washington in 2017, a spokesperson for the project said Friday.

NASA sees super typhoon Rammasun eyeing landfall

2 hours ago

Imagery from NASA's Aqua satellite captured a wide-eyed Typhoon Rammasun as it was making landfall in northern Hainan Island, China early on July 18. A rainfall analysis using another NASA satellite showed ...

Recommended for you

'Comb on a chip' powers new atomic clock design

17 minutes ago

Researchers from the National Institute of Standards and Technology (NIST) and California Institute of Technology (Caltech) have demonstrated a new design for an atomic clock that is based on a chip-scale ...

Quantum leap in lasers brightens future for quantum computing

26 minutes ago

Dartmouth scientists and their colleagues have devised a breakthrough laser that uses a single artificial atom to generate and emit particles of light. The laser may play a crucial role in the development of quantum computers, ...

Technique simplifies the creation of high-tech crystals

29 minutes ago

Highly purified crystals that split light with uncanny precision are key parts of high-powered lenses, specialized optics and, potentially, computers that manipulate light instead of electricity. But producing ...

A new multi-bit 'spin' for MRAM storage

3 hours ago

Interest in magnetic random access memory (MRAM) is escalating, thanks to demand for fast, low-cost, nonvolatile, low-consumption, secure memory devices. MRAM, which relies on manipulating the magnetization ...

User comments : 8

Adjust slider to filter visible comments by rank

Display comments: newest first

thales
not rated yet Feb 26, 2009
Transparent aluminum, here we come!
Alexa
1 / 5 (2) Feb 26, 2009
it's not so surprising, many inmiscible fluids become miscible under high pressure. For example, high pressure sterilization is based on dissolution of bacterial membranes under high pressure.
Husky
not rated yet Feb 26, 2009
Another avenue for high temperature superconductors
Alexa
1 / 5 (1) Feb 27, 2009
No superconductivity was observed during these experiments.

To achieve superconductivity effectivelly, you're supposed to compress electrons only, not all atoms.
Flakk
1 / 5 (2) Feb 27, 2009
"Transparent aluminum, here we come!"

LOL! "A keyboard, how quant."
bluehigh
1 / 5 (1) Mar 01, 2009
Rich beyond the dreams of avarice!
solidspin
not rated yet Mar 04, 2009
Alexa -

NO SUPERCONDUCTIVITY MEASUREMENTS WERE DONE ON THIS SAMPLE!!!! what are you talking about?
nxtr
5 / 5 (1) Mar 04, 2009
Trekkies are coming out of the woodwork. :)