Paper Title:
Influence of Pulsed-DC Power Frequency on Mechanical Properties and High Speed Drilling Application of a-C:H:Zr-x Coatings
  Abstract

The a-C:H:Zr-x coatings are deposited on micro-drills using a closed field unbalanced magnetron (CFUBM) sputtering system with pulsed-DC power frequencies in the range 30 kHz to 110 kHz (the x in the term a-C:H:Zr-x is the frequency varied in the deposition process). The hardness of the various coatings is systematically explored. Additionally, the machining performance of the coated micro-drills is investigated by conducting high-speed through-hole drilling tests utilizing Printed Circuit Board (PCB) specimens. The experimental results reveal that the a-C:H:Zr-70 coating has the highest hardness (42 GPa), while the a-C:H:Zr-110 coating has the lowest hardness (26 GPa). In addition, it is shown that the a-C:H:Zr-70 coating increases the life of the micro-drill by a factor of three compared to that of an uncoated micro-drill.

  Info
Periodical
Advanced Materials Research (Volumes 328-330)
Chapter
Chapter 2: Material Science and Technology
Edited by
Liangchi Zhang, Chunliang Zhang and Zichen Chen
Pages
861-867
DOI
10.4028/www.scientific.net/AMR.328-330.861
Citation
W. H. Kao, Y. L. Su, S. H. Yao, S.H. Liu, "Influence of Pulsed-DC Power Frequency on Mechanical Properties and High Speed Drilling Application of a-C:H:Zr-x Coatings", Advanced Materials Research, Vols. 328-330, pp. 861-867, 2011
Online since
September 2011
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Price
$32.00
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