Thermal stability of shock-compacted diamond

  title={Thermal stability of shock-compacted diamond},
  author={Masahiro Ohkoshi and T. Akashi and Eiichi Yasuda and Yasuhiro Tanabe},
The heat resistance of shock-compacted polycrystalline diamond (PCD) was investigated and compared with that of commercially available PCD. Shock treatment of PCD with and without silicon was performed by impacting an iron flyer plate 3.2 mm thick, at a velocity of 2.3 km/s. Neither significant graphitization nor cracking was observed after heat treatment of the obtained PCD with silicon at temperatures of 1000 and 1200°C for 30 min in vacuum. Vickers hardness of the compacted PCD decreased… CONTINUE READING