Combustion-aminolysis synthesis and characterization of CrN/Cu composites

Document Type : Research Paper

Authors

1 Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology, School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan, China.

2 School of Civil and Engineering, Hunan University of Science and Technology, Xiangtan, China.

3 Materials Division, PINSTECH, Post Office Nilore, Islamabad, Pakistan.

Abstract

CrN/Cu composite powders were synthesized by employing a novel two-step technique. Firstly, the Cr2O3+CuO precursors were prepared by the solution combustion synthesis (SCS) method using cupric nitrate, urea, and chromium nitrate as initial materials. Subsequently, the SCS precursors were calcined at 850 °C in NH3 for 6 h, and transformed to CrN/Cu composite powders. The composite powders consist of the uniform subsphaeroidal particles with the particle size ranging from 200 to 300 nm. After the friction-wear test, the removal volume of the sintered CrN/Cu composite specimen (0.0218 mm3) is almost 80 times smaller than that of the sintered pure copper specimen (1.6634 mm3). The addition of CrN can improve the tribological performance of sintered copper significantly. Moreover, the electrical conductivity of the sintered CrN/Cu composite specimen is high to 85.6% of IACS (International Annealed Copper Standard).

Keywords

References

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Journal of Ultrafine Grained and Nanostructured Materials
Volume 53, Issue 1
June 2020
Pages 1-8

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History

  • Receive Date: 25 February 2020
  • Revise Date: 20 June 2020
  • Accept Date: 20 June 2020

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