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| Topic: "Diamonds, the hardest metal." | |
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moe diamonds are C not CO2
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moe diamonds are C not CO2 yea, i was thinking about the process when they are made... some use various carbon based gases to extract the carbon |
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Of course,diamonds are carbon rather than metal,and only rare because of greed and business. De Beers have held the monopoly over the diamond trade since the 1920's. They own stockpiles of them to keep the prices high. They have proved to be extremely ruthless in obtaining land for mining over the years. A pity that something so beautiful can be monopolised by a company so ugly...
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Edited by
JaiGi
on
Fri 08/14/15 07:45 AM
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some use various carbon based gases to extract the carbon
Reminds me of a doctoral student researching on 'carbon vapor' behavior. Guy was researching on carbon molecules (vacuum chamber) adhering to an IC circuit. He didn't mentioned how he sourced the 'C' to vapor state. Chemical vapor deposition (CVD) can be used to produce a synthetic diamond by creating the circumstances necessary for carbon atoms in a gas to settle on a substrate in crystalline form. CVD production of diamonds has received a great deal of attention in the materials sciences because it allows many new applications of diamonds that had previously been considered too difficult to make economical. CVD diamond growth typically occurs under low pressure (1–27 kPa; 0.145–3.926 psi; 7.5-203 Torr) and involves feeding varying amounts of gases into a chamber, energizing them and providing conditions for diamond growth on the substrate. The gases always include a carbon source, and typically include hydrogen as well, though the amounts used vary greatly depending on the type of diamond being grown. Wiki confirms this!! |
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