超级金属,更强更轻

【超级金属,更强更轻】想想一种材料比塑料还要轻,却比金属表现还要好,看似天方夜谭,但洛杉矶加州大学的亨利·萨穆埃利学院发明了出来,这种新材料拥有极强的性能和极轻的重量,由镁、陶瓷、碳化硅纳米粒子合成,在汽车、航天、医疗等方面具有广泛的前景。

material
Super Strong And Light Supermetal Created In the Labs of University of California
Scientists from the UCLA (University of California, Los Angeles) Henry Samueli School of Engineering and Applied Science come with significant results in creating an incredibly strong but still lightweight new structural metal by using a novel way.

Scientists announce that the new metal shows extremely high specific strength (the weight, which a substance can resist before breaking) and particular modulus (stiffness-to-weight ratio). The metal is produced when magnesium is mixed with dense ceramic, silicon carbide nanoparticles, which are equally spread in magnesium. The particular material might be used in creating cars, lightweight airplanes, mobile electronics, spacecraft as well as medical devices. Because of its light weight, this unique metal may also assist in improving the fuel effectiveness of airplane and spacecraft, or other vehicles.

This novel method used for creating this super-strong and yet lightweight material consists of infusing magnesium along with dense silicon carbide nanoparticles. These nanoparticles happen to be smaller than 100 nanometers. As outlined by scientists, the brand new silicon carbide-infused magnesium (containing around 86% magnesium and 14% silicon carbide nanoparticles), shows record amounts of particular strength and particular modulus.

Involving nanoparticles’ not just improves the strength of the metals, but additionally preserves or even enhances metals’ plasticity. Still, due to the tendency of molecules to clump with each other instead of getting separated equally, the scientists chose to spread out the nanoparticles into a molten magnesium-zinc alloy. Scientists display the newly-formed dispersion depends on the kinetic energy of the particles’ movement, which helps stabilize molecule’ dispersion and prevents clumping to happen.

The group of scientists also found a new method of dispersing and also stabilizing nanoparticles in molten metals.

“It’s been proposed that nanoparticles could really enhance the strength of metals without damaging their plasticity, especially light metals like magnesium, but no groups have been able to disperse ceramic nanoparticles in molten metals until now.” said Xiaochun Li, the Raytheon Chair in Manufacturing Engineering at UCLA, and the lead researcher of the study.

“With an infusion of physics and materials processing, our method paves a new way to enhance the performance of many different kinds of metals by evenly infusing dense nanoparticles to enhance the performance of metals to meet energy and sustainability challenges in today’s society.” he added.

As stated by scientists, this new metal could turn out to be the first of many innovative industrial materials. Considering that magnesium is found in rich amounts on the planet, scientists believe climbing the use of magnesium would never produce any ecological issue.

http://www.thetimesgazette.com/super-strong-and-light-supermetal-created-in-the-labs-of-university-of-california/10321/


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