Mechanical Behavior of the Cr₃C₂ Compound at High Pressure and High Temperature

Abstract:

In the present study, we present a novel method to sinter Cr₃C₂ powders under high pressure without any addittives. The sintering Cr₃C₂ samples were charaterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), relative density measurements, Vicker’s hardness tests and Fracture toughness tests. The reasults show that Cr₃C₂ powders could be sintered to be bulk under the conditions of 3-5 GPa, 800-1200 °C and the heat preservation for 15 min. Moreover, the sintering body of Cr₃C₂ compound with the relative density of 99.84% by simultaneously tuning the pressure-temperature conditions exhibited excellent mechanical properties: a Vickers hardness of 20.3 GPa and a fracture toughness of ~8.9 MPam^1/2. These properties were much higher than that by using the previous methods. The temperature condition obtained good mechanical properties in the experiment was about 1/3 lower than that using any other methods owing to the high pressure.

• Periodical: Advanced Materials Research (Volumes 1120-1121)
• Pages: 1187-1193
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1120-1121.1187
• Online since: July 2015
• Authors: Bin Li Jiang*, Zi Li Kou, De Jiang Ma, Yong Kun Wang, Chun Xia Li, Wen Rui Duan, Xing Hui Yang
• Keywords: Bulk Cr₃C₂ Compound, Densification, High Pressure, High Temperature, Mechanical Properties, Sintering

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