Tag Archive: metals


Pic of the Day – 10/8/19

A crack in steel, seen through an electron microscope.

YouTuber NileRed says, “A few months ago, one of my patrons sent me a bunch of old gold jewelry for me to refine. I originally thought that it was going to just be some gold plated stuff, but it turned out to be quite a bit of gold. I was able to purify out all of the gold and then melt them down into some small 24K pure gold bars.”

 

How To Make Everything aims to find out!

 

On this episode of How To Make Everything our host collects some copper ore from an abandoned mine in California and extracts the copper metal out of it through electrowinning.

Bill the engineerguy demonstrates the temperature-dependent shape memory of nitinol metal. He explains how “twinning” in the crystal structure of nitinol produces the memory effect. He shows a nitinol-based engine that is powered by temperature differences. He closes the video with a description of superelasticity, a phenomenon related to the memory effect, which he demonstrates with a cardiac stent.

Extracting Ghost Town Silver

YouTuber How To Make Everything went to the silver mining ghost town of Silver Reef, Utah, to collect a sample of silver ore and meet up with Cody of Cody’s Lab to learn how to extract it. With some silver extracted he’ll be able to continue his ongoing quest to make a photograph from scratch.

The Slow Mo Guys don spiffy silver lab coats to play with molten copper, filming in slo-mo, natch.

The Fiat Economy

Great tutorial on what a fiat economy is, how it works, and why it’s doomed to fail.

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