#defects

[materialsscienceandengineering]

After 200 years scientists finally crack the “dolomite problem”

A 200-year mystery is cracked as scientists finally grow dolomite—by learning how to wash away its flaws.

For more than two centuries, scientists tried and failed to grow dolomite in the lab under conditions thought to match how it forms in nature. A recent study has finally changed that. Researchers from the University of Michigan and Hokkaido University in Sapporo, Japan succeeded by developing a new theory based on detailed atomic simulations. Their work solves a long-standing geological puzzle known as the "Dolomite Problem." Dolomite is a widespread mineral found in iconic locations such as the Dolomite mountains in Italy, Niagara Falls and Utah's Hoodoos. It is abundant in rocks older than 100 million years, yet it is rarely seen forming in more recent environments.

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[thepersonalwords]

Being a Gentleman, has more to do with hiding his flaws, than exhibiting the virtues!

Ramana Pemmaraju

[xmnn70]

[buffer-subroutine]

He died for our sins.

[kindnessjournalblog]

[firowisteria]

THERE IS ANOTHER REDHEAD ELLIE?! I WAS JUST TOLD THIS?!

she's from Defects I think

[mr-geargrinder]

Today is apparently Goop Dice Defect Day!

I've got my new 3d printer up and running properly now, and while cleaning up to test some new prints, I discovered a leaky purple die. This one was already set to the side because of some clear coat issues, but I discovered it had been printed with some delamination pin-hole gaps along the numbering. This was probably from one of the last batches I printed when the Mars 2 Pro was already having a pretty rough time. I tried to toss all the ones with obvious lamination issues, and this is exactly why!

It only took the slightest bit of pressure with a hobby knife to split the whole thing into two pieces. When a print gets any sort of defect like that, its just trash. Not even worth salvaging because there's no way to fix it or restore any sort of strength to the print once that that happens.

The second set was a hot car test. I've got a friend who lives in one of those terrible hellstates where it's normally over 100°F or worse. He feared that if he ordered a pair of goop dice from me that they would explode while sitting in the carrier's truck. So I took it upon myself to test that problem.

I do not live in a terrible hellstate, but today's temp readings say it's 93°F, but feels like 100. I threw a pair on my dashboard, in the direct sun, doors closed, windows up. An hour later, they had exploded. Not just cracked, but burst open. They were also extremely hot to the touch because they probably reached or got pretty close to boiling, I'd imagine.

This is obviously a more extreme circumstance, but one I would do need to consider, either way. I don't foresee too many people leaving their dice on the hot dash in the middle of an extremely hot summer day, but if they do get left in a bag in a car or in the back of an infamously hot delivery truck, this is still a possible problem that needs addressing. Plus I've gotta worry about what might happen in the opposite situation when it gets too cold!

Fortunately, the Mars 5 Ultra is up and running with a new build plate and that means I can run off test prints much more quickly and hopefully have a workable solution to the problem much sooner.

[materialsscienceandengineering]

A tiny diamond defect could reveal a mysterious new kind of magnetism

A diamond-based quantum sensor could help unlock a mysterious new class of magnets that may power the next generation of ultra-efficient electronics.

For decades, scientists recognized only two major types of magnets. One is the familiar ferromagnet, the kind found in refrigerator magnets and countless everyday devices. The other is the antiferromagnet, whose magnetic properties are hidden at the atomic level but have attracted growing interest because of their potential use in advanced technologies. More recently, researchers identified a third category known as altermagnets. First proposed within the last decade, these materials may combine some of the most useful characteristics of both ferromagnets and antiferromagnets, potentially opening the door to faster, more energy-efficient electronics.

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