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Experimental studies on cryogenic recycling of printed circuit board

  • Chris Y. Yuan
  • Hong C. ZhangEmail author
  • Gregory McKenna
  • Carol Korzeniewski
  • Jianzhi Li
ORIGINAL ARTICLE

Abstract

Printed circuit board (PCB) recycling is an important challenge for today’s industry. This paper presents results from a study of cryogenic decomposition as a potential alternative recycling method for obsolete printed circuit board scraps. In this method liquid nitrogen is employed as a cryogen to form an environment as low as 77 K for PCB treatment. In order to test the effect of thermal stress set-up during the rapid cryogenic treatment, impact tests were used to simulate the current shredding process. The treated PCB scraps were investigated under a monocular microscope with a 200X magnitude for micro-crack effect observation. Fatigue behavior of the boards was also examined by repeating the cryogenic treatment. The experimental results, as analyzed, demonstrated no obvious support to this alternative PCB recycling method. The energy absorbed during the impact tests for the cryogenically treated boards is insignificantly different from those without the treatment.

Keywords

Cryogenic Impact test Liquid nitrogen Printed circuit board Recycling 

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Notes

Acknowledgements

We gratefully acknowledge thefinancial support from National Science Foundation (project #: DMII 0225927)and the College of Engineering at Texas Tech University.

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Copyright information

© Springer-Verlag London Limited 2006

Authors and Affiliations

  • Chris Y. Yuan
    • 1
  • Hong C. Zhang
    • 1
    Email author
  • Gregory McKenna
    • 2
  • Carol Korzeniewski
    • 3
  • Jianzhi Li
    • 1
  1. 1.Department of Industrial EngineeringTexas Tech UniversityLubbockUSA
  2. 2.Department of Chemical EngineeringTexas Tech UniversityLubbockUSA
  3. 3.Department of ChemistryTexas Tech UniversityLubbockUSA

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