Startseite Microstructure and mechanical properties of nano-carbon reinforced Cu-based powder metallurgy friction materials produced by hot isostatic pressing
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Microstructure and mechanical properties of nano-carbon reinforced Cu-based powder metallurgy friction materials produced by hot isostatic pressing

  • Rui Shu , Xiaosong Jiang , Jiaxin Jiang und Degui Zhu
Veröffentlicht/Copyright: 15. November 2018
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Materials Testing
Aus der Zeitschrift Materials Testing Band 60 Heft 9

Abstract

Cu-based powder metallurgy friction material is technically one of the most important powder metallurgy friction materials due to its high conductivity, high strength, good thermal properties and wear endurance. In this paper, nano-carbon reinforced Cu-based powder metallurgy friction materials were prepared by hot isostatic pressing (HIP). Microstructure and mechanical properties of nano-carbon reinforced Cu-based powder metallurgy friction materials with different nano-carbon content were systematically investigated. The microstructures of the nanocomposites were examined by optical microscopy (OM), X-ray diffraction (XRD), back scattered electron imaging (BSE), scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS). Mechanical properties were determined from micro-hardness, shear strength and compressive strength. The fracture and strengthening mechanisms of nano-carbon reinforced Cu-based powder metallurgy friction materials are explored on the basis of the microstructure and composition of the nanocomposites along with the formation and function of the interface. The nano-carbon mainly enhances the nanocomposites by load transfer and obstruction of dislocation. The synergistic effect of multi-walled carbon nanotubes (MWCNTs)and graphene improves the dispersion but hinders the densification process. The interfaces between carbon and copper are the main source of cracks, and the nanocomposites are mainly composed of brittle fracture.

Kurzfassung

Cu-basiertes pulvermetallurgische Reibmaterial stellt technisch eines der wichtigsten pulvermetallurgischen Reibmaterialien dar, und zwar aufgrund der hohen Leitfähigkeit, der hohen Festigkeit, guten thermischen Eigenschaften und Verschleißfestigkeit. In der diesem Beitrag zugrunde liegenden Studie wurden Nano-Karbon-verstärkte Cu-basierte pulvermetallurgische Reibmaterialien mittels des isostatischen Heißpressens hergestellt (Hot Isostatic Pressing (HIP)). Die Mikrostruktur und die mechanischen Eigenschaften der Nano-Karbon-verstärkten Cu-basierten pulvermetallurgischen Reibmaterialien mit verschiedenen Nano-Karbon-Anteilen wurden systematisch untersucht. Die Mikrostrukturen der Nanokomposite wurden mittels Lichtmikroskopie, Röntgendiffraktometrie, Elektronenrückstreu-Imaging und mittels Rasterelektronenmikroskopie, ausgerüstet mit energiedispersiver Spektroskopie untersucht. Die mechanischen Eigenschaften wurden anhand der Mikrohärte, der Scherfestigkeit und der Druckfestigkeit bestimmt. Die Bruch- und Verfestigungsmechanismen der Nano-Karbon-verstärkten Cu-basierten pulvermetallurgischen Reibmaterialien wurden auf Basis der Mikrostruktur und Zusammensetzung der Nanokomposite sowie Bildung und Funktion der Grenzfläche ermittelt. Das Nano-Karbon verbessert die Nanokomposite hauptsächlich bezüglich des Belastungstransfers und der Behinderung von Versetzungen. Der synergistische Effekt von MWCNTs und Graphen verbessert die Dispersion, verhindert aber den Verdichtungsprozess. Die Grenzflächen zwischen Karbon und Kupfer stellen die Hauptquelle für Risse dar, und die Nanokomosite weisen hauptsächlich spröde Brüche auf.

Keywords: MWCNTs; graphene; hot isostatic pressing; microstructure; mechanical properties
*Correspondence Address, Assoc. Prof. Dr. Xiaosong Jiang, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, P. R. China, E-mail:

Rui Shu, born in 1994, graduated in Materials Science and Engineering at Southwest Jiaotong University, Chengdu, China in 2017. He is a Master of Science student in Materials Science and Engineering at Southwest Jiaotong University and doing research on powder metallurgy.

Dr. Xiaosong Jiang, born in 1979, graduated with a Bachelor's degree in Powder Metallurgy from Central South University, Changsha, China in 2002. He completed his Master of Science in Materials Physics and Chemistry at Southwest Jiaotong University, Chengdu, China in 2007. Then, in 2011, he completed his PhD degree at Tongji University, Shanghai, China. He is an associate professor at Southwest Jiaotong University, Chengdu, China. His main research fields are powder metallurgy, welding, and fretting fatigue.

Jiaxin Jiang, born in 1987, graduated with a Bachelor's and Master's degree in Mechanical Engineering at Shanghai University, Shanghai, China in 2008 and 2011. She is an assistant professor at Chengdu Textile College, Chengdu, China. Her main research fields are fatigue and wear resistance.

Dr. Degui Zhu, born in 1965, graduated with a Bachelor's, Master's and PhD Degree in Materials Science and Engineering at Southwest Jiaotong University, Chengdu, China in 1986,1989 and 2013, respectively. He is an associate professor at Southwest Jiaotong University, Chengdu, China. His main research fields are powder metallurgy, welding, ceramics, and fatigue.

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Published Online: 2018-11-15
Published in Print: 2018-09-30

© 2018, Carl Hanser Verlag, München

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Compression testing of additively manufactured continuous carbon fiber-reinforced sandwich structures
  5. Microstructure and mechanical properties of nano-carbon reinforced Cu-based powder metallurgy friction materials produced by hot isostatic pressing
  6. Thermo-mechanical testing of TiO2 functional coatings using friction stir processing
  7. Ternary melt blend based on poly (lactic acid)/chitosan and cloisite 30B: A study of microstructural, thermo-mechanical and barrier properties
  8. Untersuchungen zur verlässlichen Messung der Härte nach dem UCI – Verfahren (Ultrasonic Contact Impedance)
  9. Electrochemical impedance spectroscopy of sand of varied particle size and water content using the three-electrode system
  10. Recycling of LM25 aluminum alloy scraps
  11. Mechanical fracture characterization of adhesive interfaces: Introducing a new concept for evaluating adhesive quality
  12. Effect of welding processes on mechanical and microstructural properties of S275 structural steel joints
  13. Essential Work of Fracture: Bestimmung des gültigen Ligamentbereiches mittels digitaler 3D-Bildkorrelation
  14. Synthesis, properties and EDM behavior of 10 wt.-% ZrB2 reinforced AA7178 matrix composites
  15. Solid particle erosion wear behavior of severe plastically deformed AA7075 alloys
  16. Performance of coated and uncoated carbide/cermet cutting tools during turning
  17. Assessment of soft materials for anthropomorphic soft robotic fingertips
  18. Application of the grey based Taguchi method and Deform-3D for optimizing multiple responses in turning of Inconel 718
https://doi.org/10.3139/120.111217
Schlagwörter für diesen Artikel
MWCNTs; graphene; hot isostatic pressing; microstructure; mechanical properties

Artikel in diesem Heft

  1. Inhalt/Contents
  2. Contents
  3. Fachbeiträge/Technical Contributions
  4. Compression testing of additively manufactured continuous carbon fiber-reinforced sandwich structures
  5. Microstructure and mechanical properties of nano-carbon reinforced Cu-based powder metallurgy friction materials produced by hot isostatic pressing
  6. Thermo-mechanical testing of TiO2 functional coatings using friction stir processing
  7. Ternary melt blend based on poly (lactic acid)/chitosan and cloisite 30B: A study of microstructural, thermo-mechanical and barrier properties
  8. Untersuchungen zur verlässlichen Messung der Härte nach dem UCI – Verfahren (Ultrasonic Contact Impedance)
  9. Electrochemical impedance spectroscopy of sand of varied particle size and water content using the three-electrode system
  10. Recycling of LM25 aluminum alloy scraps
  11. Mechanical fracture characterization of adhesive interfaces: Introducing a new concept for evaluating adhesive quality
  12. Effect of welding processes on mechanical and microstructural properties of S275 structural steel joints
  13. Essential Work of Fracture: Bestimmung des gültigen Ligamentbereiches mittels digitaler 3D-Bildkorrelation
  14. Synthesis, properties and EDM behavior of 10 wt.-% ZrB2 reinforced AA7178 matrix composites
  15. Solid particle erosion wear behavior of severe plastically deformed AA7075 alloys
  16. Performance of coated and uncoated carbide/cermet cutting tools during turning
  17. Assessment of soft materials for anthropomorphic soft robotic fingertips
  18. Application of the grey based Taguchi method and Deform-3D for optimizing multiple responses in turning of Inconel 718
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