Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (10): 1501-1505.DOI: 10.12068/j.issn.1005-3026.2018.10.026

• Mechanical Engineering • Previous Articles     Next Articles

Influence of ZrO2 Coating on Basement Damping Characteristics

DU Guang-yu, TAN Zhen2, LIN Zeng1, BA De-chun1   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. Institute of Technology,Shenyang Radio and TV University, Shenyang 110004, China.
  • Received:2017-07-05 Revised:2017-07-05 Online:2018-10-15 Published:2018-09-28
  • Contact: BA De-chun
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Abstract: The ZrO2 coatings were deposited onto TC4 substrate by electron beam physical vapor deposition to explore the mechanism of its effect on the damping of the substrate. The surface morphology and structural properties of the coatings were characterized by SEM and XRD, while the damping properties of the coatings were measured using the dynamic mechanical analyzer(DMA). The results showed that, with the temperature increasing, the grain size becomes larger, the micro-defects decrease, the thin layer loss factor produces a hybrid orientation, the loss factor increases, and the damping performance improves. At high frequencies, due to the compensation effect, the grain boundaries defects of the mixed crystal orientation in the coating disappear, which hinders the further improvement of the damping characteristics of the coating. The damping performance is the best when the substrate temperature is 400℃ and the frequency is 55Hz.

Key words: damping characteristics, ZrO2 coatings, microstructure, dynamic mechanical analyzer(DMA), PE-PVD

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