where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

1600 views
Technical Discussions
Elmar van den Elzen
Engineering,
Lismar Engineering B.V., Netherlands, Joined Aug 2000, 15

Elmar van den Elzen

Engineering,
Lismar Engineering B.V.,
Netherlands,
Joined Aug 2000
15
01:06 Apr-11-2006
measuring conductivity and permeability

Dear all,

We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples. The samples typically have a flat site a few cm across. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?

Best regards


    
 
 
Linas Svilainis
R & D,
Kaunas University of Technology, Lithuania, Joined Nov 1998, 67

Linas Svilainis

R & D,
Kaunas University of Technology,
Lithuania,
Joined Nov 1998
67
02:25 Apr-11-2006
Re: measuring conductivity and permeability
Dear Elmar,

you wrote
----------- Start Original Message -----------
: ..We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples...

Maybe it's a complex permeability you want to measure?
If yes:

.. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?...

Then RLC meter with some mathematics on geometry will do. We have prepared the paper on toroidal samples complex permeability measurement in low frequency range (0.1-10MHz). If interested, I can send you some excerpts.

People do complex permeability measurement at GHz. For instance, refer to:
Jacquart. Influence of the electrical resistivity of a ferromagnetic thin film on its permeability measurement performed with a permeameter. Elsevier Journal of Magnetism and Magnetic Materials 281 (2004) 82–91

Best regards

Linas


    
 
 
Changqing Lee
Changqing Lee
03:37 Apr-11-2006
Re: measuring conductivity and permeability
I have seen people use alternative current potential drop (ACPD) method for measuring the electrical conductivity and the effective magnetic permeability of ferromagnatic samples at the frequency range of several hundred Hz to 10KHz. Please google it yourself.

Eddy current testing is another option. But to determine conductivity and permeability at the same time is always hard.

----------- Start Original Message -----------
: Dear Elmar,
: you wrote
: : ..We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples...
: Maybe it's a complex permeability you want to measure?
: If yes:
: .. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?...
: Then RLC meter with some mathematics on geometry will do. We have prepared the paper on toroidal samples complex permeability measurement in low frequency range (0.1-10MHz). If interested, I can send you some excerpts.
: People do complex permeability measurement at GHz. For instance, refer to:
: Jacquart. Influence of the electrical resistivity of a ferromagnetic thin film on its permeability measurement performed with a permeameter. Elsevier Journal of Magnetism and Magnetic Materials 281 (2004) 82–91
: Best regards
: Linas
------------ End Original Message ------------




    
 
 
Jim Yukes
Consultant
Canada, Joined Aug 2005, 11

Jim Yukes

Consultant
Canada,
Joined Aug 2005
11
08:15 Apr-13-2006
Re: measuring conductivity and permeability
I checked with a Queens U Magnetics Department Grad & he suggested: There are many different ways to measure permeability depending on the material and application. For some standard methods visit www.astm.org and search for standards with key words "magnetic permeability".

For the conductivity measurement, Google search phrase "contact resistance tester".

----------- Start Original Message -----------
: Dear all,
: We want to measure the electrical conductivity and the effective magnetic permeability of ferromagnatic samples. The samples typically have a flat site a few cm across. Does anyone know a lab that could do these measurements or know a straight forward method we can set-up ourselves?
: Best regards
------------ End Original Message ------------




    
 
 

Product Spotlight

TOPAZ® 64: Fully Integrated Portable 64 Channel PAUT Instrument with FMC & TFM

Introducing TOPAZ64, the industry’s most intelligent fully integrated, portable 64-channel phased
...
array ultrasound (UT) instrument. TOPAZ64 combines code-compliant phased array UT with the industry’s most advanced full matrix capture (FMC) and total focusing method (TFM) capabilities. Featuring the highest acquisition frequency in its class, high resolution FMC and a 12” multi-touchscreen, users can easily visualize even the smallest flaws. TOPAZ64 can generate a bipolar pulse that provides more acoustic energy versus previous models for punching through thick components. The result is a portable tool that delivers increased inspection coverage, more accurate signals, and the ability to handle all UT inspections in one package. TOPAZ64 is ideal for challenging applications in transportation, oil and gas, manufacturing and power generation.
>

High-end Ultrasonic Flaw Detector with 32:128PR PAUT and 2-ch TOFD: SyncScan 2

SIUI’s newly launched SyncScan 2, is a high-end ultrasonic flaw detector with 32:128PR PAUT and
...
2-ch TOFD, which can maximize your efficiency for PA and TOFD. ● Support PA/TOFD/UT ● 32-ch PA is more suitable for inspection on extra-thick wall and high-attenuation material. ● 32-ch PA and 2-ch TOFD work simultaneously. ● Support PR mode for corrosion inspection.
>

Research and Applications Development For NDT

The Research and Applications Development (RAD) group is a newly formed team within Acuren dedicat
...
ed to tackling challenging inspection problems. Our focus is the development of novel, field deployable, advanced inspection techniques for use in cases where standard NDT methods are ineffective. We don't wait for new innovations, we engineer them. From concept to commissioning.
>

FMC/TFM

Next generation for Phased Array UT is here now with FMC/TFM! Have higher resolution imaging, impr
...
oved signal to noise ratio, characterize, size and analyze defects better with access to several wave mode views and save raw FMC data for higher quality analysis.  Some of the benefits are:
  • Beautiful Image! Easier to understand what you're looking at
  • Completely focused in entire image or volume
  • Much easier to define setups before inspection
  • Easier to decipher geometry echoes from real defects
  • Oriented defects (e.g. cracks) are imaged better
  • See image from different wave modes from one FMC inspection
  • FMC data can be reprocessed/analyzed without going back to the field
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window