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Articles by Jiecai Han
Total Records ( 2 ) for Jiecai Han
  Dejiang Chen , Weijie Li , Xinghong Zhang , Ping Hu , Jiecai Han , Changqing Hong and Wenbo Han
  This paper investigated the thermal shock behavior of hot-pressed zirconium diboride (ZrB2–10 vol%SiC–10 vol%ZrO2) composite by means of water quenching. Under single thermal shock, the retained strength presented sharp degradation with the temperature difference (ΔT) above 500 °C. Differently, the retained strength decreased rapidly with ΔT above 300 °C under five-cycle thermal shock. Analysis of the microstructural features also showed discrepancy for the composite under different thermal shock conditions. Further discussion found that the thermal shock resistance of ZrB2–SiC–ZrO2 composite was influenced by the intrinsic properties as well as the oxidation behavior under high temperature.
  Xinghong Zhang , Lin Xu , Wenbo Han , Ling Weng , Jiecai Han and Shanyi Du
  Hot-pressed zirconium diboride (ZrB2) matrix composites containing 0–30 vol% silicon carbide (SiC) whiskers have been investigated to determine the effect of composition (i.e. amount of SiC whiskers) on the microstructure, mechanical properties and thermal properties. With increasing SiC whisker volume contents, the flexural strength and fracture toughness of the composites were improved compared to those of monolithic ZrB2. Flexural strength increased from 629 MPa for pure ZrB2 to 767 MPa for ZrB2–30 vol%SiCw. Likewise, fracture toughness ranged from 5.4 to 7.1 MPa m1/2 over the same composition range. Specific heat capacity increased with SiC whisker addition, while thermal diffusivity and thermal conductivity decreased slightly with the increase of SiC whisker content.
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