247 – Bulk Metallic Glass
Guest: Douglas Hofmann Host: Markus Voelter Shownoter: Alexander Grote
Dr. Douglas Hofmann works as a scientist in the Metallurgy Lab at NASA’s Jet Propulsion Laboratory. I visited Doug during my US trip earlier this year, and we chatted about metallic glass. In particular, we discussed its properties, how to create it in bulk, how to test its properties, as well as how and why it is interesting for use in space.
Introduction of Dr. Douglas Hofmann00:01:21
JPL Metallurgy Facility | Metallurgy | Technology Readiness Level
Transparent Aluminum | Alloy | Conductivity | Glass | Vitrification | Fourier Heat Transfer Equation | Crystal | Brittleness | Ductility | Toughness
Properties and applications of Metallic Glasses00:25:47
Ashby Plot | Elasticity | Yield Strength | Injection Moulding | Corrosion | Corrosion Fatigue | Wear | Impact | Lubrification | Lubrification of Space Systems | Gear | Ball Bearing
Manufacturing of (Bulk) Metallic Glasses00:58:15
Thermal Conduction | Direct Casting | Blow Molding | Chanel Bottle from Jan Schroers | Arc Melting | Metal Injection Molding | Die Casting | Hardness | Speed of Sound | Strain wave gearing | Phase Diagrams metallic glasses | 3D-Printing Episode OmegaTau (German!)
Excellent episode, 5 Stars.
And while we are talking about ‘stars’ here is the link to the Star Trek episode snippet with the ‘transparent aluminum’. I can’t imagine that the Omegatau audience doesn’t know this clip.
Another great episode! So much interesting stuff I’ll be listening to it again.
Thanks Markus for the fascinating podcasts!
6 of 5 stars for this episode!! I would really like to get my hands on to this stuff!
Thanks a lot Markus for sharing this with us!
Thanks very much to Markus and Dr Hofmann, this was a fascinating interview on a set of materials with so many potential uses. I’m recommending the interview to an ex-colleague who works on commercialising innovations of all types.
Another great Omega Tau episode.
Thank you very much!
One question stuck in my mind though.
What happens if the required cooling speed is not reach for the inside of a given part?
Given the outside layers are actually cooled down fast enough, but the total heat can’t be absorbed, so the inside will cool slower and form crystals. Will the part stay that way and maybe have some interesting properties? Or will the crystallization propagate to the outer layers?
I guess then you get an inconsistent material that does not have the desired properties. This is why the “bulk” is limited.
Hmm… the link is dead, streams don’t work either.
What link? What stream?
“We [at NASA] are frustrated with how slow the speed of light is”
Love this one so much I’ve listened to it multiple times!
In the podcast it was said that the company Engel (producer of world class injection moulding machines) would be located in Germany. This is wrong. Engel has its headquarter in Schwertberg (Upper Austria).