Synthesis of Ultrafine Cr3C2 Powders by Carbothermal Reduction of Precursors

Yong Zhong Jin; Fa Ming Ye; Chun Hai Liu; Rui Song Yang

doi:10.4028/www.scientific.net/AMR.549.310

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 549Synthesis of Ultrafine Cr3C2 Powders by...

Synthesis of Ultrafine Cr₃C₂ Powders by Carbothermal Reduction of Precursors

Abstract:

Ultrafine Cr3C2 powders with globular-like particle of ~0.3-0.8 μm were synthesized by a new precursor method, namely carbothermal reduction of complex chromium oxide-carbon mixture, which was made initially from salt solution containing chromium and carbon elements by air drying and subsequent calcining at 400 °C for 1 h. Phase composition of reaction products was discussed by X-ray diffraction (XRD), and microstructure of the calcined powders and final products was studied by scanning electron microscopy (SEM). The results show that the synthesizing temperature of Cr₃C₂ powders was reduced greatly by the new precursor method. Thus, the preparation of ultrafine Cr₃C₂ powders is at only 1000 °C for 2 h. The lowering of synthesizing temperature is mainly due to the homogeneous chemical composition of the complex oxide-carbon mixture. There is a coarsening tendency of Cr₃C₂ powders with the increase of reaction temperature and time.

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Periodical:

Advanced Materials Research (Volume 549)

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310-313

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https://doi.org/10.4028/www.scientific.net/AMR.549.310

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Online since:

July 2012

Authors:

Yong Zhong Jin, Fa Ming Ye, Chun Hai Liu, Rui Song Yang

Keywords:

Carbothermal Reduction, Chromium Carbide, Powder Synthesis, Precursor

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