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中文摘要：
采用HAAKE Poly Lab QC转矩流变仪的密炼模块,制备了粉末装载量为55%（体积分数）,粘结剂配方（质量分数）为60%石蜡＋35%低密度聚乙烯＋5%硬脂酸的不同Ni含量的Ni-Al_2O_3喂料,并在130℃、140℃、150℃条件下通过MLW-400型毛细管流变仪对其进行黏度测定,通过MATLAB曲线拟合、回归参数的方法确定了喂料的幂率指数与黏流活化能。结果表明：Ni含量的变化对幂率指数n影响较小,说明粘结剂配方合理,喂料的均匀性好;但是随着Ni含量的增加,喂料对温度的敏感性增强。实验结果为粉末注射成形制备Ni-Al_2O_3复合材料提供了流变学参考,从而为研究不同Ni含量对Al_2O_3陶瓷性能的影响奠定基础。
英文摘要：
Ni-Al_2O_3 feedstock with 55%（volume percent） powder loading and diverse content of Ni was prepared in mixing module of HAAKE Poly Lab QC torque rheometer. The formulation of binder is 60%PW＋35%LDPE＋5% SA（mass percent）. The viscosity of feedstock was measured at MLW- 400 capillary rheometer at 130 ℃,140 ℃,150 ℃. The value of power law exponent and flow activation energy was calculated through curvefit and regress of MATLAB. The results show that content of Ni has little influence on power law exponent of feedstock,which indicates the formulation of binder is appropriate and feedstock is homogeneous. However,the sensitivity of feedstock for temperature increases with the Ni content increasing. The experimental results provide reference to preparation of Ni-Al_2O_3 composites using powder injection molding and laid foundation on research of Ni content on properties of Al_2O_3 ceramic.
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