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Post by zuthal on May 4, 2017 23:46:27 GMT
So, you are saying that ablative PTFE chamber/nozzle coatings for HF missile engines might actually work?
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Post by kaiserwilhelm on May 5, 2017 14:44:51 GMT
So, you are saying that ablative PTFE chamber/nozzle coatings for HF missile engines might actually work? Nozzles/chamberss yeah no it would melt. As newageofpower and mzself said onlz things that are under the melting point.
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Post by Rocket Witch on May 6, 2017 21:59:18 GMT
List updated.
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Post by ππππππππππ on Jun 20, 2017 1:23:03 GMT
As we are all aware, CDE doesn't account for all the things that spontaneously explode in contact with each other, so I'm hoping to be able to compile a list of ingame materials that shouldn't be put together, and in the case of fluorine list the few things it is safe with. This list is primarily concerned with things that just can't coexist within any reasonable space of time, so for example an iron water tank would be considered acceptable and not be listed. Note also that currently the list is only concerned with stock materials, and only those that are able to come into direct contact with each other in module design. This list is likely to be incomplete; contributions are welcome. FluorineFluorine is so reactive that only materials safe with it are listed.- Aluminum & oxide (at low temperatures). - Aluminum nitride. - Graphite (up to 670K). - Nickel & alloys. - Polytetrafluoroethylene. - Steels (up to 470K). OxidizersIncludes: Oxygen, Ethylene Oxide, Hydrogen Peroxide.- Reactive with all metals to varing degrees; most will form a passivating layer but alkali metals in particular will not. - Neptunium, Uranium, Plutonium are pyrophoric, making oxidizers unsuitable as reactor and RTG coolants. Alkali MetalsIncludes: Lithium, Sodium, Potassium.- Vigorous reaction with water, acids, oxidizers. HydrocarbonsIncludes: Methane, Ethane, Propane, Butane, Pentane, Decane, RP-1.- Will be absorbed by and corrode polymers (nitrile rubber, polyethylene, UHMWPE, possibly PTFE). Mercury- Will amalgamate with most metals over time. Exceptions include iron, platinum, tungsten, tantalum. Ammonia- Relatively slow reaction with copper. I was thinking that this is kinda pointless as if you had fluorine gas in a lithium container, wouldn't the walls just be coated with teflon or something?
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Post by captinjoehenry on Jun 20, 2017 1:30:34 GMT
Hmm so I heard that lithium would make a better coolant than sodium. And considering how reactive sodium is already and that there are no impurities around why couldn't we use liquid lithium as coolant?
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Post by zuthal on Jun 20, 2017 9:17:06 GMT
Nitrile rubber is, according to Wikipedia, resistant against aliphatic hydrocarbons, which all the hydrocarbons we have fall under, and PTFE should be resistant to attack by hydrocarbons as well - fluorocarbons are afaik generally insoluble in hydrocarbons.
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Post by Rocket Witch on Jun 20, 2017 15:40:44 GMT
I was thinking that this is kinda pointless as if you had fluorine gas in a lithium container, wouldn't the walls just be coated with teflon or something? qswitched is on record sometime around AugustβOctober saying that materials are assumed to be coated. Though I personally doubt any extra mass or cost is dedicated to that, I imagine one of the reasons reactivity wasn't implemeneted was that the cost/mass penalty is negligible anyway, which most radiator coatings make an example of. Nitrile rubber is, according to Wikipedia, resistant against aliphatic hydrocarbons, which all the hydrocarbons we have fall under, and PTFE should be resistant to attack by hydrocarbons as well - fluorocarbons are afaik generally insoluble in hydrocarbons. Right, I wasn't sure about PTFE and had read something about nitriles in general that made me doubt they have issues; thanks for confirming.
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Post by zuthal on Jun 20, 2017 20:46:58 GMT
And another reason for not implementing that of course is that there is no real easy way to deduce the reactivity of a material combo just from the basic properties, and explicitly defining it for everything very quickly leads to a combinatorial explosion and becomes impossible.
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Post by ππππππππππ on Jun 21, 2017 7:43:32 GMT
if you were to fire lithium bullets into a flourine tank, would they react and make it worse for the enemy?
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Post by The Astronomer on Jun 21, 2017 7:50:02 GMT
if you were to fire lithium bullets into a flourine tank, would they react and make it worse for the enemy? Or even better, Caesium flak bombs on a missile.
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Post by ππππππππππ on Jun 22, 2017 7:31:30 GMT
if you were to fire lithium bullets into a flourine tank, would they react and make it worse for the enemy? Or even better, Caesium flak bombs on a missile. is cesium in the game?
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Post by The Astronomer on Jun 22, 2017 7:52:03 GMT
Or even better, Caesium flak bombs on a missile. is cesium in the game? idk. Moddit.
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Post by ππππππππππ on Jun 23, 2017 2:24:51 GMT
how about some mercury flak... it would be a cool effect to have a liquid as flak
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Post by ππππππππππ on Jun 25, 2017 8:53:20 GMT
what about flak that isnt actually metal, like acid or something? it would make repairing the ship a huge pain in the Ass.
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Post by n2maniac on Jun 26, 2017 4:49:12 GMT
what about flak that isnt actually metal, like acid or something? it would make repairing the ship a huge pain in the Ass. Nuclear waste flak? Because, with all those reactors around, you know everyone has some and it is still plenty toxic (probably much better at making that suck than any corrosive or poison).
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