Title of article :
Combustion-aminolysis synthesis and characterization of CrN/Cu composites
Author/Authors :
Chu ، Aimin 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 , Zhao ، Yuping School of Civil and Engineering - Hunan University of Science and Technology , ud-din ، Rafi Materials Division - PINSTECH - Post Office Nilore , Tian ، Li 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 , Guo ، Shibo 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 , Xu ، Hongmei 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 , Zhang ، Huajian 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
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 mm^3) is almost 80 times smaller than that of the sintered pure copper specimen (1.6634 mm^3). 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 :
CrN , Cu composite powder , Precursor , Solution combustion synthesis , Aminolysis , Tribological performance
Journal title :
Journal of Ultrafine Grained and Nanostructured Materials
Journal title :
Journal of Ultrafine Grained and Nanostructured Materials
