/u/ShakeTheFuture
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 | This iron Lava Chicken was made by melting iron using an ordinary microwave oven. For those who haven’t heard about it—yes, you can melt metals in a regular microwave oven. It works thanks to the silicon carbide crucibles I use. These crucibles absorb microwaves and convert them into heat, allowing us to melt metal. I won’t go into the full details here. First, I 3D printed the chicken together with a sprue in translucent PLA. I use translucent PLA because it burns out much cleaner than colored PLA. That’s not to say colored PLA can’t burn out cleanly—but you won’t know until you try. Translucent PLA is usually made from raw material without pigments, so there’s less residue when burned out. I made the sand mold using fine silica sand mixed with sodium silicate, then burned it out in a homemade microwave kiln. It’s similar to those small microwave kilns sold for glass fusing, but mine is much larger. My microwave is turned on its side, so I could fit those large microwave kilns and melting chambers. I control the microwave using a cycle timer. It turns the microwave on and off like a thermostat. But instead of being triggered by temperature, the cycle is based on the time I set. For example, I often run the microwave for 1 minute, then let it rest for 6 minutes. For this burnout, I started on the defrost setting to cure the mold gradually—running it at full power (900W) too soon could cause it to crack if it's not fully cured. After burnout, I let the mold cool and wrapped it in aluminum foil. This helps to keep the mold together in case it cracks. The iron for this cast came from a 0.5 kg weight plate. I often use brake discs too, but as a creator, I sometimes choose materials that tell a story or are visually recognizable. A weight plate tells more in a thumbnail than a generic piece of scrap iron, which you wouldn’t identify unless you read the title. That’s the only reason I keep melting those weight plates. When melting iron, I always preheat the crucible with a blowtorch. It's not required, but it speeds up the process. After preheating, I microwaved the crucible for 40 minutes straight—no opening, no checking. After the pour, I used salt water to make the chicken rusty. I dunked it, let it dry, and repeated that a few times. By the next morning, the chicken had transformed into a rusty Lava Chicken that looked like a roasted bird. The final touch was sanding the bones. submitted by /u/ShakeTheFuture [link] [comments] |
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