Imagine a whole cruise liner made of thisMagnesium armour sounds like a bad idea if magnesium gets hot enough to burn it also reacts with water to produce hydrogen making for a very big fire. The car moved 3 cm. A wearable flotation device that will stay afloat, even after being punctured? See the stories that matter in your inbox every morning. "Guo's lab created a structure in which the treated surfaces on two parallel aluminium plates face inward, not outward, so they are enclosed and free from external wear and abrasion. Misti Pickles May 15, 2015 01:36 PM Gseattle, it won't float for long if it has a hole in in. Anything will float as long as it is lighter,then the water it displacesReplace steel for ships & subs & use this "The material starts out as a matrix made of magnesiumalloy, which is turned into a foam through the addition of silicon carbidehollow spheres developed by DST. When placed in water, they burn or explode. Mass produce said material alone. Lithium, sodium, and potassium all float on water. 200 tons of iron will float on water as long as it has an air pocket, think boat.Gseattle, it won't float for long if it has a hole in in. Now, by using lasers seven times as powerful, and faster scanning, the lab has speeded up the process, making it more feasible for scaling up for commercial applications.The project was supported by funding from the Bill & Melinda Gates Foundation, the US Army Research Office, and National Science Foundation.© Will Fox 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019© Will Fox 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019© Will Fox 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 "That was a very interesting inspiration," Guo says. Provided that the boat displaces 1,000 pounds of water before the whole thing is submerged, the boat flo… Sodium and lithium both react with the water to give off hydrogen gas - they look a bit like fizzies when they do it. This last example may be related to the fact that the US Army Research Laboratory collaborated on the research.The team says the material could be in prototypes for testing within three years. 387 views

These lightweight spheres are extremelystrong, with the shell of a single sphere able to withstand over 25,000 PSI ofpressure before rupturing. Scientists at the University of Rochester have demonstrated a new technique for creating superhydrophobic metals that float on water, using femtosecond laser bursts to "etch" the surfaces and trap air. So if a boat weighs 1,000 pounds (or kilograms), it will sink into the water until it has displaced 1,000 pounds (or kilograms) of water.

Electronic monitoring devices that can survive long term in the ocean?All of the above, according to Chunlei Guo, Professor of Optics and Physics, whose lab describes the breakthrough in The structure uses a groundbreaking technique the lab developed for using femtosecond bursts of lasers to "etch" the surfaces of metals with intricate micro- and nanoscale patterns that trap air and make the surfaces superhydrophobic, or water repellent.The researchers found, however, that after being immersed in water for long periods of time, the surfaces may start to lose their hydrophobic properties.Enter the spiders and fire ants, which can survive long periods under or on the surface of water. While the Alkali metals Lithium, Potassium, and Sodium are all light enough to float on water, they are also highly reactive. In a development that could mean big things in the automotive andmarine industries, researchers from Deep Springs Technology (DST) and the NewYork University Polytechnic School of Engineering have created a new metalmatrix composite that is so light it can float on water. The new lightweight metal matrix foam floating in a beaker of water "This new development of very light metal matrixcomposites can swing the pendulum back in favor of metallic materials," saysNikhil Gupta, an NYU School of Engineering professor in the Department ofMechanical and Aerospace Engineering and the study’s co-author. While lithium, potassium, and sodium are all light enough to float on water, they are also highly reactive. As the researchers note in the paper: "The key insight is that multifaceted superhydrophobic (SH) surfaces can trap a large air volume, which points towards the possibility of using SH surfaces to create buoyant devices.

The superhydrophobic surfaces will keep water from entering the compartment, even when the structure is forced to submerge in water.Even after being forced to submerge for two months, the structures immediately bounced back to the surface after the load was released, Guo says. The structures also retained this ability even after being punctured multiple times (as pictured below), because air stays trapped in remaining parts of the compartment or adjoining structures.Though the team used aluminium for this project, the "etching process "could be used for literally any metals, or other materials," Guo says.When the Guo lab first demonstrated the etching technique, it took an hour to pattern a one-inch-by-one-inch area of surface.

"The abilityof metals to withstand higher temperatures can be a huge advantage for thesecomposites in engine and exhaust components, quite apart from structural parts.

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