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January 1998

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Subject:
Re: Thermal cycling
From:
DAVID C WEBER <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Tue, 6 Jan 1998 20:05:10 -0500
Content-Type:
text/plain
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text/plain (46 lines) 
Liquid-liquid is more accelerated. This is because the heat transfer of the
perfluoronated liquid is much better than air. Thus, the rate of change is
faster. This causes higher thermal stresses. The use of accelerated life
tests is to reduce test time & cost (sample size). You can find failures
that may take 100's of parts and 1000's of hrs to find. The only thing you
have to watch out for is failures that would never happen in the field.

----------
> From: Scott Westheimer-CTUA143 <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Thermal cycling
> Date: Tuesday, January 06, 1998 1:06 AM
>
> Can anyone tell me the difference between thermal cycling in
liquid/liquid
> or air/air. Is there a different failure mode associated  with each
process?.
>  Meaning, if a sample passing one but fails the other what would be the
> reasons?
>
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