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Enhanced properties of functionally graded Cu–Cr powder compacts

  • Indranil Lahiri and Sanjeev Bhargava
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 100 Issue 5

Abstract

The paper aims to present the processing and development of functionally graded Cu – Cr materials, widely used as a monolithic contact material in vacuum circuit breakers. Simple and novel processing routes, used in this study, in addition to being cost-effective and energy efficient, generate higher density and electrical conductivity of the Cu – Cr compacts. It is shown that the use of mechanically alloyed Cu – Cr powders enhances the properties of the compacts, as compared to those prepared from as-received powders. Furthermore, explosive compaction and application of coated powder were found to result in still better properties. Scanning electron microscopy and atomic force microscopy were used to explain the scientific significance of this development.

Keywords: Cu – Cr; Functionally graded materials; Mechanical alloying; Explosive compaction; Coated powder
* Correspondence address, Indranil Lahiri EC 2760, Department of Mechanical & Materials Engineering Florida International University 10555, West Flagler Street, Miami, Florida 33174, USA Tel.: +1 305 348 0452 Fax: +1 305 348 1932 E-mail:

apresently at Florida International University, Department of Mechanical and Materials Engineering, Miami, Florida, USA

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Received: 2008-5-14
Accepted: 2008-10-1
Published Online: 2013-06-11
Published in Print: 2009-05-01

© 2009, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110087
Keywords for this article
Cu – Cr; Functionally graded materials; Mechanical alloying; Explosive compaction; Coated powder

Articles in the same Issue

  1. Contents
  2. Contents
  3. Feature
  4. Nd–Fe–B permanent magnets a quarter century later: implications for patentability
  5. Micromagnetism of advanced hard magnetic materials
  6. Magnetism of nanostructured materials for advanced magnetic recording
  7. Basic
  8. A Study of the Al–Mg–B Ternary Phase Diagram
  9. Effects of Lanthanum on Magnetic Behavior and Hardness of Electroless Ni–Fe–P Deposits
  10. Interfacial Reactions between Lead-Free Solders and the Multilayer Au/Ni/SUS304 Substrate
  11. Melting Behavior of Sn–Bi Alloy Powder Compacts Observed Using Optical Dilatometry
  12. High-Strength Mg-Based Bulk Metallic Glass Composites with Remarkable Plasticity
  13. Determination of Liquidus Temperature in Sn–Ti–Zr Alloys by Viscosity, Electrical Conductivity and XRD Measurements
  14. The coupled FEM analysis of super-high angular speed polishing of diamond films
  15. Applied
  16. Comparison of Depth-Sensing Indentation at Ultramicroscopic Contacts by Single- and Multiple-Partial-Unload Cycles
  17. Sintering Behavior of ZnO: Mn Ceramics Fabricated from Sol-Gel Derived Nanocrystalline powders
  18. Suitability of Maraging Steel Weld Cladding for Repair of Die-Casting Tooling
  19. Enhanced properties of functionally graded Cu–Cr powder compacts
  20. Influence of Cr on the microstructure and mechanical properties of Ti–Si Eutectic Alloys
  21. Notifications
  22. DGM News
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