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《Chinese Journal of High Pressure Physics》 2008-04
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Optimization of High Pressure Sintering Process for PDC by Orthogonal Experiments

LIN Feng1,2,JIANG Wei2,FENG Ji-Fu2,LI Li-Wei2,L Hai-Bo1(1.Powder Metallurgy Research Institute,Central South University,Changsha 410083,China;2.China National Special Mineral Material Engineering Research Central,Guilin 541004,China)  
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 1350 ℃,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.
【Fund】: 广西科技攻关项目(桂科攻0322009-5);; 广西科学基金(桂科青0728100);; 广西“新世纪十百千人才工程”专项资金
【CateGory Index】: O521.3
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