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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Carbon Fiber Wrapped Barrels
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<blockquote data-quote="Colcalcipherol" data-source="post: 727819" data-attributes="member: 57500"><p><span style="color: black"><span style="font-size: 12px"><span style="font-family: 'Times New Roman'">Finally there is a topic where I can make a legitimate contribution. I'm a PhD physical chemist with considerable experience and knowledge in thermodynamics. There is some debate over whether the carbon wrapping insulates or helps to cool a barrel. These wrappings are made of a very, very interesting, graphene- or graphite-like material consists of highly ordered carbon atoms. The high degree of ordering enables enhanced thermal conductivity by means of phonon transport which is the vibration of a lattice. Image several pool balls aligned perfectly on a table at short distances (say two inches apart). A person who is a decent shot can put energy into the que ball and transfer it down the line to the last ball which takes off at nearly the same speed as the incident que ball (and in the same line if everything is perfectly aligned). In the carbon fibers, the carbon atoms align in such a way that thermal energy can pass through the material via intermolecular collisions (like the pool balls) due to the extremely high order—which basically means that they are just lined up in the perfect manner. Let me give you some numbers: the thermal conductivity of carbon steel is 36-54 W/m/K while stainless steel is 16.3-24 W/m/K. You'll notice that it takes stainless a little longer to cool than carbon steel—this is why. These fibers, constructed of carbon nanotubes, have a thermal conductivity of 3180-3500 W/m/K! So, you can see that they are not insulators and that they will conduct heat very, very well.</span></span></span></p><p> </p><p><span style="color: black"><span style="font-size: 12px"><span style="font-family: 'Times New Roman'">I am having a .375 CheyTac built and I have asked my smith to use a Proof Research (ABS) carbon wrapped barrel. I'll report back after I have put her through the paces. </span></span></span></p></blockquote><p></p>
[QUOTE="Colcalcipherol, post: 727819, member: 57500"] [COLOR=black][SIZE=3][FONT=Times New Roman]Finally there is a topic where I can make a legitimate contribution. I'm a PhD physical chemist with considerable experience and knowledge in thermodynamics. There is some debate over whether the carbon wrapping insulates or helps to cool a barrel. These wrappings are made of a very, very interesting, graphene- or graphite-like material consists of highly ordered carbon atoms. The high degree of ordering enables enhanced thermal conductivity by means of phonon transport which is the vibration of a lattice. Image several pool balls aligned perfectly on a table at short distances (say two inches apart). A person who is a decent shot can put energy into the que ball and transfer it down the line to the last ball which takes off at nearly the same speed as the incident que ball (and in the same line if everything is perfectly aligned). In the carbon fibers, the carbon atoms align in such a way that thermal energy can pass through the material via intermolecular collisions (like the pool balls) due to the extremely high order—which basically means that they are just lined up in the perfect manner. Let me give you some numbers: the thermal conductivity of carbon steel is 36-54 W/m/K while stainless steel is 16.3-24 W/m/K. You’ll notice that it takes stainless a little longer to cool than carbon steel—this is why. These fibers, constructed of carbon nanotubes, have a thermal conductivity of 3180-3500 W/m/K! So, you can see that they are not insulators and that they will conduct heat very, very well.[/FONT][/SIZE][/COLOR] [COLOR=black][FONT=Times New Roman][SIZE=3] [/SIZE][/FONT][/COLOR] [COLOR=black][SIZE=3][FONT=Times New Roman]I am having a .375 CheyTac built and I have asked my smith to use a Proof Research (ABS) carbon wrapped barrel. I’ll report back after I have put her through the paces. [/FONT][/SIZE][/COLOR] [/QUOTE]
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