Materials Science
214 episodes
#6395: Why 3M Primer 94 Sticks to Everything
A tiny active payload of under six percent solids allows 3M Primer 94 to physically diffuse into low-surface-energy plastics like polypropylene.
#6279: What Salt-Free Water Conditioners Actually Do
A German test showed template-assisted crystallization reduced scale accumulation on heating coils from 0.4 moles down to 0.001 moles.
#6252: How the Kilogram Leaves the Basement
A third consensus value for the kilogram took effect on March first, differing by five micrograms from its predecessor.
#5985: Meccano at 125: What Kids Actually Learn From Bolts
Meccano just relaunched for its 125th year — but does childhood tinkering actually build lasting engineering intuition?
#5935: How Pressure Actually Bonds VHB Tape
Fifteen pounds of force isn't fifteen psi of pressure. That gap is why your whiteboard might fall off the wall.
#5889: How Pipeline Pigs Actually Work
A bundle of straw that squealed through the pipe gave the industry its weirdest word. Now pigs weigh tons and hunt cracks underground.
#5884: The Machines That Take 5 Years to Replace
Large power transformers, HVDC converters, nuclear forgings — why some essential machines have no quick reorder.
#5822: Building Herod's Wall, One Course at a Time
How 300-tonne limestone blocks became a 488-metre retaining wall — without anyone ever lifting them to the top.
#5806: Graphene's Real Story: Lab to Fab at Last
Graphene's properties were never hype — the physics is real. The hard part was always making it at scale. That's finally changing.
#5776: Why UV Epoxy Keeps Curing in the Dark
UV epoxy isn't the same as craft-store UV resin — and its acid-based cure keeps working long after the light goes off.
#5761: Why You Shouldn't Dremel Your Antique Silver
A rotary tool removes metal in seconds that took a century to form. Here's what museums do instead — and why shine isn't the goal.
#5749: From Sand to Trillion-Dollar Chips: Semiconductors in 5 Levels
A bad conductor and a bad insulator — and the most important material in civilization. Semiconductors explained in five escalating levels.
#5745: Why Europlugs Fit Israeli Sockets So Badly
A 2.5-amp plug, a 16-amp socket, and half a millimeter of interference. The physics of a connection that was never meant to hold.
#5741: The Bulb That Lit the 20th Century
From Edison's carbon filament to the blue LED that unlocked white light — how we got from 1 lumen per watt to 150.
#5740: Your Vacuum's Best Upgrade Is the Head
Most people use 30% of their vacuum's capability. The cheapest fix isn't a new machine — it's the nozzle on the end.
#5737: Why Measuring a $4 Spudger Tip Is Weirdly Hard
A listener wants to put a number on his spudger's tip thickness. Turns out that's a real metrology problem.
#5714: The Moon's Junkyard Has a Gift Shop
150 tons of stuff sits on the Moon. Two objects on one square meter tell opposite stories: a $5.50 nylon flag and a silicon disc built for millennia.
#5707: Epoxy vs Superglue: The Tooling Gap Nobody Talks About
Epoxy beats superglue on every measurable axis — so why does everyone still grab the tube? The answer is metering, and the tools that fix it.
#5674: Sharpen vs Hone: The Right Knife Tool
A whetstone is the pro's choice — but it might be the wrong tool for the knife you actually own.
#5656: Why a Headlamp Fails at Precision Electronics Work
A camping headlamp is better than nothing — but it's the wrong tool for board work. Here's what the specs actually say.
#5635: Why Your VHB Tape Keeps Falling Off the Wall
VHB tape is a viscoelastic acrylic foam, not glue — and it fails on dirty grout, cold tile, and no roll-down pressure, not on bad tape.
#5610: Magnetizing Screwdrivers: Do the Cycles Wear Out?
Can a screwdriver be magnetized forever, or does the magnetism wear out? A deep dive into magnetizer blocks, coils, and demagnetization.
#5599: Cantilever Racks: Why Long Things Need Different Steel
Why a ladder needs a cantilever, not a shelf — and how to actually mount one in an Israeli rental's concrete walls.
#5579: Cutting Things With a Dremel: What Actually Works
Cut-off wheels vs cutting bits, RPM by material, and why lateral cutting is fine with the right attachment and fatal with the wrong one.