Erosive and sliding wear of polybenzimidazole at elevated temperatures

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• 作者：S. Sharma ; E. Padenko ; J. Bijwe ; B. Wetzel ; K. Friedrich
• 刊名：Journal of Materials Science
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：51
• 期：1
• 页码：262-270
• 全文大小：4,228 KB
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• 作者单位：S. Sharma (1)
  E. Padenko (2)
  J. Bijwe (1)
  B. Wetzel (2)
  K. Friedrich (2)
  
  1. Industrial Tribology Machine Dynamics and Maintenance Engineering Center (ITMMEC), Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India
  2. Institute for Composite Materials (IVW GmbH), Technical University of Kaiserslautern, 67663, Kaiserslautern, Germany
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Polybenzimidazole (PBI) is the most sought polymer for high thermal stability, mechanical strength and retention at elevated temperatures. However, its potential for tribological applications, especially at high temperatures and under various wear modes, is not yet explored in depth. In this work, commercially available PBI was investigated under sliding wear against steel at elevated temperatures and different pressures. A relation between the linear wear rate and the test temperature could be shown. But the wear mechanisms do not differ very much within the temperature range tested. In addition, the solid particle erosion resistance of PBI under different impact angles and surface finishes was investigated at ambient and high temperature. A higher erosion rate took place when the temperature was increased. Overall, PBI showed a semi-brittle erosive failure (α _max at 45°) behaviour. Scanning electron microscopy was used to understand the wear mechanisms in more detail, and white light profilometry allowed to get information about the topography of the fresh and eroded surfaces.