Hard disk material

Philip Belben philip at axeside.co.uk
Mon Nov 24 14:44:53 CST 2008

Jules Richardson wrote:
> William Donzelli wrote:
>> It looks like sometime in the future I may need to rebuild a damaged
>> magnetic drum. It has some scratches that may be too deep. As a
>> brainstorm, I am wondering about recoating the surface. If I use
>> refined iron oxide, what would I use as a fixer (glue)? What was
>> typically used on early hard disk platters and drums?
> Seriously? Do keep us posted... far as I know, it's not something that 
> anyone's ever tried before - it'd be interesting to know how you get on. 
> I'm not even sure how you could coat a drum in glue / oxide and get it 
> of uniform thickness without specialist tooling.

I wonder whether you could mix the oxide with the binder first, and then 
have only one uniform thickness layer to apply.

Incidentally, someone was mentioning nickel and its alloys.  Why 
wouldn't nickel work alone?  Hysteresis too small, or something?


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