NPL launches report - High-Frequency Vibration Tests of Sn-Pb and Lead-Free Solder Joints
Sep 18, 2007
National Physical Laboratory has released a new report of its work conducting high frequency tests of lead-free solder alloys, using a reproducible model solder joint as the sample, to which well controlled vibration has been applied.
The chosen frequencies for this research were 400 and 800 Hz, corresponding to acceleration in the range of 10 to 20g. The study highlighted the different behaviour of the various alloys when subjected to vibration, in particular the superiority of the SnPb alloy, especially at higher frequencies.
This method has been shown to be useful in characterising and ranking various materials, tests could be easily repeated with a range of conditions, targeted at specific industrial applications. The results suggest that the higher the concentration of silver in the lead-free alloys, the better is the performance at 400 Hz. The method is versatile, and the equipment could easily be modified for testing at high temperatures.
For a copy of this new NPL Report MAT 2 please contact Ling Zou at ling.zou@npl.co.uk
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