Author/Authors :
Petre Badica، نويسنده , , Hanna Borodianska، نويسنده , , Shumao Xie، نويسنده , , Wen-Ting Zhao، نويسنده , , Dmytro Demirskyi، نويسنده , , Peifeng Li، نويسنده , , Alfred I.Y. Tok، نويسنده , , Yoshio Sakka and Satoru Ohno، نويسنده , , Oleg Vasylkiv، نويسنده ,
Abstract :
Boron carbide ceramic was prepared by reactive Spark Plasma Sintering under N2-atmosphere and for different heating times and maximum pressure regimes. Split-Hopkinson Pressure Bar (SHPB), indentation, XRD and microscopy measurements were performed for samples characterization. It is shown that SHPB toughness control depending on SPS regime is possible and the main reason is introduction of nitrogen into B4C ceramic. Complex relationships between processing conditions, sintering mechanism, materialʹs specifics, static and dynamic mechanical properties are discussed. Improvement of dynamic toughness is through mechanisms resembling those working for static load conditions such as cracks deflection and pull out, but there are also significant differences.
Keywords :
SHPB , C. Hardness , Boron Carbide , SPS , Toughness
