Making Purple Gold
Added 2023-12-20 06:20:07 +0000 UTCHey guys, I am happy to say that I was able to get one last video out this year. This is a project that I have been working on for way too long and I am really relieved that it is finally done! I hope you enjoy it.
Also, just like last time, I unfortunately have to post the public version tomorrow. So, I would like to do another livestream Q&A thing to make up for this. I will also do a poll or something to try and find the best day to do it on.
Comments
I'm a jeweler, and I've wanted to mess with purple gold for years.
Rocinante
2024-04-06 02:08:47 +0000 UTCThat was a great video!
Shayan Peyghambari
2024-01-07 20:51:24 +0000 UTCThis video was sooooo cool my colleagues loved watching it with me
J-D-a-r-t-e-r-
2023-12-28 12:37:52 +0000 UTCMachinist here. Concerning the pitting on the outer surface of the gold, I wonder what it would look like if you carved a thin layer off all the surface edges using a wire EDM machine, then buffed it with a cloth wheel and polishing compound.
Joe
2023-12-23 18:42:56 +0000 UTCyou scared the crap out of me after you dropped the “gold” around the 7 minute mark lmao. it was funny and i had a great laugh seeing that. looking forward to see more of those kind of jokes in the feature.
Landon Bardowsky
2023-12-23 02:32:27 +0000 UTCsame lmao
swixfr
2023-12-23 02:31:16 +0000 UTCGreat video! I wondered while watching though, could you make your gold mixture a little light on aluminum and then use an aluminum tube to bubble argon and expect that it's sacrificial to some degree?
Matt
2023-12-23 01:46:35 +0000 UTCThe "Oh no" at 7:51 really got me lol.
Seth Dolin
2023-12-22 20:56:14 +0000 UTCMan! That turned out RAD. I think the open ends look great. Another excellent year of videos. Thanks! Have a great holiday season and wonderful new year.
Chris WIRVIN
2023-12-21 21:28:00 +0000 UTCThe test for this might be to see if the anneal-to-make-it-purple step still works if done under argon.
Kevin Martin
2023-12-21 15:44:21 +0000 UTCI never liked gold. But this purple one is beautiful. Great project. Thank you!
Marta
2023-12-20 21:34:06 +0000 UTCWow, beautiful work, Nile!
Jer
2023-12-20 11:41:51 +0000 UTCThat makes him sound like a Lovecraft character: Nigel, Creator of Purple Death (by H.P. Lovecraft).
TeslaMaster
2023-12-20 11:34:37 +0000 UTCNot a dumb idea, I see the point. Thin film interference could, in theory, be why the heat-treating works on the surface. But I would say that isn't the main mechanism. Mainly because the pieces are immediately purple on the inside when broken. There is no way for a thin film to form that way AFAIK. I suspect that the colour is just very sensitive to the intermetallic lattice which is easily destroyed if sanded or when Al is removed by the acid. Kinda makes me want to run some DFT to see where the bands would sit x3
Tuubi
2023-12-20 11:21:54 +0000 UTCNigel, do you have a microscope? I would have loved to see what that grain looked like at higher magnification, though as a microscopy dork I might be biased.
Gems of Science
2023-12-20 09:29:40 +0000 UTCone thing in hindsight, if the ring has the gap, you can potentially go down one size, for a more firmer fit, due to the ring having a little give
Paul Fisher
2023-12-20 09:18:01 +0000 UTCPurple gold is also called "Purple Death", but a video called "Making Purple Death" would probably get you demonetized.
Gems of Science
2023-12-20 08:22:27 +0000 UTCI wonder if the purple/pink color is due to thin film interference? Like the addition of aluminum allows the gold to develop a thin oxide film, and when heated this oxide film becomes thick enough to cause thin film interference effects, similar to temper colors in steel. I think this would explain why the color goes away when sanded (since it's just a layer of oxides sitting on the surface) and must be heated to 600°C to develop color.
Kilo Juliett
2023-12-20 08:21:14 +0000 UTCDude that turned out beautifully! Congrats!
Dead Slayer54
2023-12-20 08:00:20 +0000 UTCyoooo
Oliver
2023-12-20 07:24:58 +0000 UTCThe live sounds fun!!
Shelby Gash-slushby
2023-12-20 06:51:19 +0000 UTCNice! Can't wait to watch!
Nota Fed
2023-12-20 06:34:28 +0000 UTC
