@@SuperAWaC In which industries and which procedure is used to weld titanium? It's a refractory metal, so you must have to use a pretty powerful machine.
@@MarcDuhamelify it's not terribly difficult to weld with the correct setup. the fact it's a refractory metal doesn't matter. tungsten can be welded if you really want to. titanium weldments aren't super common but show up in various industries where titanium is used in general. energy/aerospace.
1. obligatory ’how do you know that’ 2. moistened with what, though? (logically i know it’s probably just water because it’s so goddamn common that people mean water when they say something is moistened. but still.)
@@SashaThePhoenix 1.) Shop class where my teacher demonstrated why you don't mix aluminum and water. (Apparently he once had a wet mold that almost blew his hand off.) The resulting fire couldn't be quenched by water or putting SAND on it and it's something I'll never forget. 2.) Yup, good old hydrogen oxide. Remarkable oxidizer under the right circumstances.
@@garethdean6382 the reason the mold exploded is because the water boiled and created steam so he had a steam explosion. It happens if you pour any (hot) molten metal in a wet mold.
it is extremely difficult to get tungsten white hot. its melting temperature is higher than the temperature that any hydrocarbon flame can produce. most torches only go up to about half of tungsten's melting temperature, the hottest torches regularly available (oxyacetalyne welding torches) go up to about 5400 degrees which is still almost a thousand degrees too low, so that is the hottest you'd realistically be able to get it. it also takes a long time to get up to that temperature because the hotter it's getting the more work you have to put in to make it hotter. it's also not enough to insulate it in an oven because most kaowool (what most ovens are insulated with) melts at a lower temperature than tungsten. you'd need to build an oven out of silicon carbide bricks and use a flame that does not use a hydrocarbon fuel (like cyanogen or something) or an electric current to get tungsten white hot.
You should see the stuff I got from Skylighter recently, it's German Blackhead 2 micron aluminum powder and is so fine it flows like a liquid, it's actually quite dangerous in the air, and even more so mixed with an oxidizer.
Have you ever seen Bedknobs and Broomsticks? A bedknob is a plot point for the intradimensional traversal bed used in the film, and once enchanted the bedknob glows when twisted. The nickel ball reminded me of that.
My grandmother lost all feeling in the big toe of her right foot earlier this week so you should do a *RHNB Gran's Toe episode.* With my gran's toe being the star of the show!
not really. it just drove off any moisture and impurities that might be in the powder, causing it to cake. sintering is when the grains of the metal start to grow together without truly fusing. a small amount of it would melt but the powder wouldn't stay hot enough for a long enough time for any proper sintering to happen.
Ese polvo de aluminio no se funde porque fue producido en condiciones atmosféricas y por lo tanto cada partícula está recubierta por una capa de óxido de aluminio que tiene una temperatura de fusión muy alta. El polvo tiene muchísimo más oxido de aluminio superficial que un bloque compacto de ese metal, por razones obvias. Un polvo de aluminio más reactivo se obtiene pulverizándolo en una atmósfera de nitrógeno, sea com un molino de bolas o un molino de café, lo importante es que todo el sistema esté encerrado en una cámara de nitrógeno.
Some military missiles and rockets use aluminum powder as an igniter to initiate the burning of the solid rocket fuel. Aluminum powder can be bad stuff to play with.
@@RhapsodicXStyle07 because most things he messes with release gases, so if he has a fume hood and/or good ventilation, he's ok But aluminium powder (like any fine powder tbh) gets EVERY FUCKING WHERE the moment you open the bag
Well, given that theses particles are really tiny, "very thin" could be equal to or greater than the radius of the particles. The bag at the beginning indicates the particles are "425 mesh." Looking this up it seems to translate to a mesh opening size of 35 micrometers. Assuming that all the particles are of the same diameter equal to the mesh opening, the radius of the particles are .00175 cm. Finally assuming a (metallic and oxide) aluminum density of 2.7 g/ccm, this is a surface area to mass ratio of 635 sq cm per ccm. The actual average particle radius may be smaller than 35 microns, so this ratio is likely larger than 635.
@@FelixUmbra That depends on how small it was ground. Super fine powder has a lot of surface area compared to the internal volume. Not sure what percentage of each is here, but It is a lot of oxide either way, enough to keep it from forming any meaning amount of molten metal when he hit it with the torch. That may be by design from the manufacturer, very finely powdered aluminum is a fire hazard if it isn't oxidized.
it is but finely divided aluminum won't fuse without a lot of flux because aluminum oxidizes readily when exposed to oxygen even at room temperature and the oxide has a much higher melting point
@@nokorus6035 yep, it's the reason magnesium shards are typically used to light thermite, since magnesium can be lit with a torch and then in turn burns hot enough to start a thermite reaction.
Dark Matter is so dense that if it were brought within Earth’s gravitational pull, it’s sheer density would cause it to be pulled straight into the center of the earth, maybe a slight deviation from true straight because of Earth’s rotational speed, but otherwise pretty friggin’ straight.
Mix aluminium oxide and chromium oxide thoroughly and melt that with your hydrogen flame If you get it to melt with that You will have real Ruby and will be florescent bright pink under a uv torch. Please record it. 😉
