3 ms·
The fact they don't have a 'buy one of our magnets now, $10' button tells me that the tech doesn't actually work.
by londons_explore 1y ago
The fact they don't have a 'buy one of our magnets now, $10' button tells me that the tech doesn't actually work.
- aredox 1y agoThe last thread of informed comments here on this: https://news.ycombinator.com/item?id=42995429 https://news.ycombinator.com/item?id=42995429
- pfdietz 1y agoYes, that deflated my optimism.
- ralphonzathew 1y agoIron nitride is much more useful as a thin film coating. Bulk magnet tech just isn't there.
- scythe 1y agoThe only report of a bulk Fe16N2 magnet I remember reading about used a 2 GPa (300 kpsi) diamond anvil to compact the powder. I can see why that might be economically impractical right now. Also there was a bombshell paper that came out claiming synthesis of bulk L10-FeNi which was later retracted [1] and may have put a temporary damper on interest in Fe16N2. It remains unclear which material will be available first. 1: https://advanced.onlinelibrary.wiley.com/doi/full/10.1002/advs.202408796 https://advanced.onlinelibrary.wiley.com/doi/full/10.1002/ad...
- londons_explore 1y ago2GPa wouldn't be hard to achieve in a production setting, as long as it's only needed for a second or two. You simply have a diamond anvil in your factory. Or alternatively, you use explosives or shock waves to very briefly get the pressure needed.