Technology: How Nanotech Will Help the U.S. Military Reach Mach 5 - - PressFrom - US
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Technology How Nanotech Will Help the U.S. Military Reach Mach 5

21:40  19 november  2019
21:40  19 november  2019 Source:   popularmechanics.com

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a plane flying in the sky: Materials engineered at the atomic level will enable hypersonic weapons to survive punishing heat and stress.© Raytheon Materials engineered at the atomic level will enable hypersonic weapons to survive punishing heat and stress.
  • Hypersonic weapons are now a top priority for the Pentagon.
  • The new weapons are exposed to temperatures of up to 17,000 degrees, necessitating the development of new, heat-resistant materials.
  • Nanotech and carbon nanotubes could offer a way forward to building hypersonic weapon bodies.

The U.S. government is pushing into hypersonic weapons in a big way, with at least five different weapons programs currently in development. Nanotechnology is shaping up to be a key tech that will enable delivery systems to survive traveling through the atmosphere at Mach 5 and above, with carbon nanotubes showing promise as strong, lightweight material that rapidly sheds heat.

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Hypersonic weapons are weapons that travel at incredible speeds through the atmosphere. Hypersonics start at Mach 5 (3,836 miles an hour), or five times the speed of sound. Pushing an object through the air at really, really fast speeds creates a unique problem: as speed increases, the friction from the object passing through air also increases.

a plane flying in the air: A B-52 carries an X-15 rocket plane under its wing, to launching altitude for a test flight over Edwards Air Force Base, California. November 1961. © Dean Conger - Getty Images A B-52 carries an X-15 rocket plane under its wing, to launching altitude for a test flight over Edwards Air Force Base, California. November 1961.

This friction generates heat. The skin of the SR-71 Blackbird strategic reconnaissance jet and the fasted manned airplane ever built regularly warmed to up to 500 degrees Fahrenheit at Mach 3. The X-15 rocket plane, flown during the 1960s, reached temperatures of 1200 Fahrenheit as it flew to Mach 6. At Mach 10, the friction is enough to “melt the toughest steel,” while at Mach 20, the temperature reaches an astounding 17,000 Fahrenheit. Eventually, hypersonic weapons could reach Mach 24.

Russia’s Navy Will Be the First To Use Hypersonic Weapons

  Russia’s Navy Will Be the First To Use Hypersonic Weapons Moscow will likely win the race to field the first hypersonic weapon system. The Russian Navy will likely be the first to yield hypersonic weapons, the Zircon cruise missile.Hypersonic weapons travel at speeds in excess of Mach 5, making them difficult to intercept. Zircon could be equipped with nuclear weapons to attack U.S. aircraft carriers or land targets.The Russian Navy will be the first to field a hypersonic weapon system, according to a prominent military analyst.

Scientists and engineers understand how to handle traditional air friction problems thanks to the technical challenges of spacecraft and nuclear warheads re-entering the atmosphere. But a missile warhead de-orbiting over an enemy target is only exposed to heat for a handful of minutes, as it transitions from space to the atmosphere and finally smashes into its target. A hypersonic weapon, on the other hand, spends its entire flight within the atmosphere and is exposed to high heat the entire time.

a close up of a blue sky: A computer graphic representation of a carbon nanotube. © IBM Research/Flickr A computer graphic representation of a carbon nanotube.

An article at DefenseOne describes how scientists are working with carbon nanotubes to solve the heat issue. Scientists at Florida State University’s High-Performance Materials Institute are looking into using carbon nanotubes as a construction material for hypersonic weapons. Carbon nanotubes are a synthetic material consisting of carbon tubes with a diameter as small as one nanometer. Carbon nanotubes are stronger than steel and insulate against heat. Now, researchers have discovered that soaking carbon nanotubes in phenol can increase their ability to disperse heat by one-sixth, allowing less nanomaterials to be used for the same job.

What does this mean for hypersonic weapons? It means that materials that can stand the heat and stresses of hypersonic, atmospheric travel are on the way, and that hypersonic weapon designers could even safely achieve higher speeds by using thicker layers of the stuff.

Source: Defense One

Putin says the Russian Navy's newest ship will soon carry a new hypersonic missile that may be unstoppable .
Little is known about the Zircon missile, which Russia says can travel at speeds up to Mach 9 and has a range of 1,000 km. Putin toured the corvette Gremyashchi on a visit to the northwestern Russian city of Kaliningrad last Thursday. "It will certainly have Tsirkon," Putin told Defense Minister Sergei Shoyu.

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