If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #607
Joined: Tue Mar 27 2007, 10:39AM
Location:
Posts: 64
Listening to a radio station in the USA via the web (Real Radio 104.1 Orlando) they recently did an experiment whereby two iron balls are wrapped in aluminium (aluminum) foil and then banged together quite hard. This produced a surprisingly loud bang and flash. Has anyone tried this as I find no Google or Youtube references, quite surprisingly. Cheers. Mark H.
Registered Member #607
Joined: Tue Mar 27 2007, 10:39AM
Location:
Posts: 64
They weren't hitting them too hard, just "hard enough." Sometimes they got a bang, sometimes not. I don't think there's a wrong or right way, just whack until they crack. I know you have to rotate the balls to get fresh Al.
I'm not sure about the steel balls, unless they're rusty... They didn't mention the iron balls were rusty, but I imagine they would have to be as the reaction requires iron oxide for the oxygen.
One thing to note is the programme (The Monsters in the morning) has featured Dr Boom from the Orlando Science Center and that maybe a source for more info...
There's an old iron fence near me that has been "uprooted" for years. I'll see if it has any ornate iron balls I can saw off. Then again, it could be steel too.
Registered Member #1430
Joined: Sun Apr 06 2008, 11:12AM
Location: Ã…rhus, Denmark
Posts: 102
i once saw this on steve spangler science show, he used 2 rusty "petanque"(a game of sorts) balls wrapped in aluminum foil, i wanted to try it so i bought 2 balls and threw them in a tub of saltwater and electricuted them til they where rusty, it worked just fine.
sometimes i put a piece of aluminum foil on my rusty anvil and smack it with a rusty hammer, looks great!
Registered Member #1408
Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679
I do not believe that thermite can be initiated via impact initiation. The sound may emanate from another source but a true thermite reaction is not (TTBoMK) ever initiated by impact.
However.....On a certain level it MAY be possible to create a "hot spot" with sufficient impact. It would be a darn good experiment but the idea of such a minor impact like steel balls......That's the problem I have. If we were talking about very sever impact creating very high heat the theory may have some validity.
Registered Member #902
Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042
it is possible, but the conditions have to be just right, but not like what quicksilver said... the heat generated may cause just a small (and I mean small) amount of aluminum to have enough E to lose the unstable oxide, causing it to strip from the nearest iron oxide... all it takes is for a very small region to begin to get a large reaction, as a thermite reaction is a spontaneous [chemical definition, not average def] reaction...
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
Minor thermite reaction...
