Effect of soaking time on the friction properties of polycrystalline diamonds
作者： Chun Liu , Fubao Zhou
DOI: 10.1016/J.IJRMHM.2014.07.032
关键词: Composite material 、 Crystallography 、 Surface roughness 、 Graphite 、 Diamond 、 Tribometer 、 Diffraction 、 Scanning electron microscope 、 Crystallite 、 Materials science 、 Chemical transformation
摘要: Abstract The friction behaviors of polycrystalline diamonds (PCD) soaked for different periods at temperatures 700 °C, 800 °C and 900 °C were evaluated using a ball-on disk tribometer in air. X-ray diffraction experiments performed to study the chemical transformation surface PCD. two-dimensional three-dimensional morphologies PCDs examined by scanning electron microscopy atomic force microscopy, respectively. Results show that coefficient average roughness (Ra) are not sensitive soaking time 700 °C. Meanwhile, no special transformations detected on PCD, except oxidation Co when exceeded 20 min. value Ra was observed decrease slightly (from 79.5 nm 91.0 nm) with increase while an outstanding PCD 60 min due diamond into graphite. decreased greatly enhancement graphitization diamond.
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