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将主烧结曲线(MSC)理论应用于93W-5.6Ni-1.4Fe高比重合金的放电等离子烧结(SPS).以加热速率100℃/min为临界点,建立了2个不同加热速率阶段合金的主烧结曲线.在2个不同加热速率阶段,93W-5.6Ni-1.4Fe高比重合金的放电等离子烧结MSC曲线均可有效预测合金烧结全过程的致密化行为,以及粉末压坯的收缩量和合金的最终烧结密度.计算了93W-5.6Ni-1.4Fe高比重合金放电等离子烧结过程中的致密化函数c,定量地证明了当加热速率大于100℃/min时,随着温度升高,合金的SPS致密化过程显著加快.此外,主烧结曲线理论计算得到的表观致密化激活能与采用Arrhenius公式计算所得到的致密化激活能基本一致.
The main sinter curve (MSC) theory was applied to the discharge plasma sintering (SPS) of 93W-5.6Ni-1.4Fe alloy with high specific gravity.With the heating rate of 100 ℃ / min as the critical point, two alloys with different heating rate Sintering curve.The discharge plasma sintering MSC curves of 93W-5.6Ni-1.4Fe alloy with high specific gravity at all two heating rates can effectively predict the densification behavior of the alloy during sintering and the shrinkage of the alloy powder The final sintering density was calculated.The densification function c during discharge plasma sintering of 93W-5.6Ni-1.4Fe alloy with high specific gravity was calculated and it was quantitatively proved that when the heating rate was higher than 100 ℃ / min, the alloy SPS The densification process is significantly accelerated.In addition, the apparent densification activation energy calculated by the theory of main sintering curve is basically consistent with the densification activation energy calculated by the Arrhenius formula.