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carbon macrotubes

No.. Not nanotubes.. Would it be possible to pyrolize a graphite tube centered in a centerfuge to form a true cylinderi...
0 comments posted 21yrs
posted by scott
0 comments posted 21yrs posted by scott

Casting Bronze Ingots

Recently, I was reading METAL-COLOURING AND BRONZING by Hiorns, and I was impressed by his account of the high level of...
2 comments posted 21yrs
posted by nospam
2 comments posted 21yrs posted by nospam

Can we now build the space elevator?

============================================================ From: Robert Clark ( snipped-for-privacy@yahoo.com) Subjec...
42 comments posted 21yrs
posted by rgregoryclark
42 comments posted 21yrs posted by rgregoryclark

asphalt tar roof shingles a good mulch???

Tried finding out some data on asphalt roof shingles as to whether they are good for plants or bad. The Internet is mix...
5 comments posted 21yrs
posted by a_plutonium
5 comments posted 21yrs posted by a_plutonium

Beyer_2 web seminars on nanocomposites

Hallo.... For all the people interested in nanocomposites I will do two web-seminars with the topics: - general overvie...
0 comments posted 21yrs
posted by gbeyer
0 comments posted 21yrs posted by gbeyer

Yield point at elevated temperature

I would need yield points at elevated temperature for several metals. Does anyone know a book which provides such inform...
4 comments posted 21yrs
posted by flocki25
4 comments posted 21yrs posted by flocki25

Can Gallium form amalgam-type alloys?

Hi all, I'm wondering if molten Ga (m.p. ca. 30 oC) would dissolve other metals,much like Hg does. And if so, which met...
3 comments posted 21yrs
posted by patrik56
3 comments posted 21yrs posted by patrik56

Powdercoating vs anodizing - how to distinguish?

Hi! Is there a simple nondestructive method to tell whether aluminum is powdercoated or anodized? Coating is black. I t...
1 comments posted 21yrs
posted by meloon
1 comments posted 21yrs posted by meloon

Filament Winding of Flywheels

1. Where can you get 20 - 50 fiber carbon fiber "tow" or thread? Tip speeds will be in the trans or super sonic range....
3 comments posted 21yrs
posted by bretcahill
3 comments posted 21yrs posted by bretcahill

Giving up

Interesting newsgroup! Ballas Schirmer Tel. +1 725 476 2608 snipped-for-privacy@pinreg.com snipped-for-privacy@pinreg.co...
0 comments posted 21yrs
posted by Ballas62
0 comments posted 21yrs posted by Ballas62

bulk modulus fluid - Youngs modulus solid

There are relationships between E, G, K for solids. K=E/(3(1-2u)) etc But is it possible to use to convert from a Bulk...
0 comments posted 21yrs
posted by ian
0 comments posted 21yrs posted by ian

Homemade alloys

Anyone know what the composition is of aluminum tin cans, specifically soda cans (coke, pepsi etc) ? I was hoping to co...
5 comments posted 21yrs
posted by mewsteve
5 comments posted 21yrs posted by mewsteve