PCD弹性模量、泊松比的测试实验研究

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Young＇s modulus and Poisson＇s ratio are two important physical parameters of polycrystalline diamond compacts （PDC）. Instron-1342 testing machine was used to measure the Young＇s modulus and Poisson＇s ratio of polycrystalline diamond （PCD）. Using compression loading test the Young＇s modulus and Poisson＇s ratio of PCD was measured successfully and the relative error is less than 6 % for Young＇s modulus and less than 8% for Poisson＇s ratio which both are in the acceptable range. The results indicate that using compression loading test to test PCD＇s Young＇s modulus and Poisson＇s ratio is simple, reliable and cost-effective.弹性模量、泊松比作为PDC的重要物性参数,其取值的精确与否将直接影响到PDC其他的力学性能。利用Instron1342电液伺服材料试验机,采用简单的压缩加载实验,成功测得了聚晶金刚石（PCD）的弹性模量、泊松比,且弹性模量最大误差不超过6,泊松比最大误差不超过8,均在允许范围之内,测试结果相当理想。该实验证明,用压缩加载实验来测试PCD的弹性模量和泊松比是可行的,且该方法简单、可靠,测试费用低。