Steve
  Attached is some testing links.
William

--- On Wed, 9/10/08, Gregg Kleinberg <microscopeman@...> wrote:

From: Gregg Kleinberg <microscopeman@...>
Subject: Re: [Antiquities_Science] non-destructive testing
To: Antiquities_Science@yahoogroups.com
Date: Wednesday, September 10, 2008, 9:05 AM







Very good, Ernst,
 
True - the field of NDT (Non-Destructive Testing) has really blossomed in the
last 20 years, especially when the issue of aging aircraft came to the surface. 
Ultrasonics, X-ray, and portable optical microscopy are all common techniques
found in aerospace inspection - find the problem while it is small and unseen,
before it becomes catastrophic.
 
You will also find these tools in heavy industry, manufacturing, and commonly at
power plants (nuclear - gas - coal), for maintenance operations.
 
For additional further information, visit the ASNT (American Society for
Non-Destructive Testing) website at http://www.asnt. org/ .
 
Good luck,
 
Gregg
 

----- Original Message -----
From: Ernst Pernicka
To: Antiquities_ Science@yahoogro ups.com
Sent: Tuesday, September 09, 2008 11:42 PM
Subject: [Antiquities_ Science] non-destructive testing



Chris,

I have not much experience with ultrasonic testing but certainly a far
better method is 3D scanning with an X-ray beam (X-ray tomography of
materials). The resolution is a few micrometers and you can test e.g.
a whole motor block. These instruments are not really around
everywhere, but we have access to one for scientifically interesting
problems. If you want to know more:

http://www.iis. fraunhofer. de/EN/bf/ xrt/tech/ ct.jsp

Best wishes, Ernst


















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