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- Feb 17, 2005
I am trying to figure this out for ultra secure erasure purposes (and mostly because I am a geek) I have not been able to figure out what the platters are made of, or their curie point. So anyone with info please post.
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JigPu said:Not if they're using ceramic or glass substrate
But then again, it'd still be a bit difficult to recover data even with one of those substrates with the aluminum housing molten on it
JigPu
Snugglebear said:You do realize that aluminum melts well below that, right? Just a wee bit of overkill to continue heating platters after the substrate turns to sludge.
Snugglebear said:Hammers and/or gravity work well on non-Al platters and are, to an extent, have a superior fun/$ ratio. Not that melting things isn't fun, it just tends to take a lot longer and run you more out of pocket.
Dr. Fischer said:But this is too big a challenge: even if there are good bulk Curie
point values for this alloy, there is no good data for its thin film form (and in principle, there can not be). The reason for this is that the physical properties of thin films depend strongly on an infinitely long list of
extraneous factors, such as the method of preparation, thickness, morphology surface and bulk), substrate conditions, and measurement conditions.
I briefly touch upon this problem on our website (look under www.ivactech.com > Services > Coatings -the red colored couple of paragraphs on the bottom. If this is really important, you can estimate the Curie point under your specific conditions.
How do you deposit (all specs, including background pressure and other contamination sources are important)? What is your substrate? How do you deposit? Why Curie point is of importance and what measurable parameters does it effect? It is possible that your substrate will be destroyed before reaching the Curie temperature.