Intermetallics could be the key to faster jets and more efficient car engines. But these heat-resistant, lightweight compounds have stumped scientists for decades. Why do so many break so easily? A team from Brown University, Oak Ridge National Laboratory, and UES Inc. used the world’s most powerful electron microscope to see, for the first time, atomic details that may provide the answer for the most common class of intermetallics. Their results – which could open the door for new materials for commercial use – are published in the current issue of Science.
Atomic resolution Z-contrast image from the world’s most powerful microscope of a non-defective region of Cr2Hf. In this view, the hafnium atoms appear yellow and the chromium atoms are red. (Image: Sharvan Kumar)
Intermetallics can withstand searing heat and are often lightweight. These properties intrigue the aerospace, defense, energy and automotive industries, which are experimenting with this class of materials in hopes of building high-performance jet engines, improved rocket motors and missile components, more efficient steam turbines and better car engine valves.
Many intermetallics, however, break easily. These compounds are typically stronger than simple metals at high temperatures. Yet they are almost as fragile as ceramics at room temperature. This fragility limits their commercial use.
Wendy Lawton | EurekAlert!
UNH scientists help provide first-ever views of elusive energy explosion
16.11.2018 | University of New Hampshire
NASA keeps watch over space explosions
16.11.2018 | NASA/Goddard Space Flight Center
Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.
Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...
Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.
Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...
Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.
In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...
On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.
When choosing materials to make something, trade-offs need to be made between a host of properties, such as thickness, stiffness and weight. Depending on the application in question, finding just the right balance is the difference between success and failure
Now, a team of Penn Engineers has demonstrated a new material they call "nanocardboard," an ultrathin equivalent of corrugated paper cardboard. A square...
19.11.2018 | Event News
09.11.2018 | Event News
06.11.2018 | Event News
19.11.2018 | Materials Sciences
19.11.2018 | Information Technology
19.11.2018 | Life Sciences