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Chinese Journal of High Pressure Physics  > 2008  >  22(4): 389-396 .
LIN Feng, JIANG Wei, FENG Ji-Fu, LI Li-Wei, Lü Hai-Bo. Optimization of High Pressure Sintering Process for PDC by Orthogonal Experiments[J]. Chinese Journal of High Pressure Physics, 2008, 22(4): 389-396 . doi: 10.11858/gywlxb.2008.04.009
Citation: LIN Feng, JIANG Wei, FENG Ji-Fu, LI Li-Wei, Lü Hai-Bo. Optimization of High Pressure Sintering Process for PDC by Orthogonal Experiments[J]. Chinese Journal of High Pressure Physics, 2008, 22(4): 389-396 . doi: 10.11858/gywlxb.2008.04.009
shu

Optimization of High Pressure Sintering Process for PDC by Orthogonal Experiments

doi: 10.11858/gywlxb.2008.04.009
  • 1.

    Powder Metallurgy Research Institute, Central South University, Changsha 410083, China;

  • 2.

    China National Special Mineral Material Engineering Research Central, Guilin 541004, China

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  • Corresponding author: LIN Feng
  • Received Date: 09 Sep 2007
  • Rev Recd Date: 17 Nov 2007
  • Publish Date: 05 Dec 2008
    Abstract
  • The wear ratio, resistance, integrality and hardness of polycrystalline diamond compacts (PDC) are investigated. The high pressure sintering processes are optimized using orthogonal experiments. According to our experimental results, the optimized parameters for the high pressure sintering of PDC are determined as below: pressure 5.5 GPa, temperature 1 350 ℃, temperature rising rate 200 ℃ /min, cooling time 14 min, and sintering time 16 min. It is found that the wear ratio and micro-hardness can be improved by increasing sintering temperature. The temperature distribution in the sample cell is reduced and PDC microstructure becomes more uniform by prolonging the heating time. The residual stress is also found to be decreased by prolonging the cooling time.

     

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