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| Research on rheology of feedstock for Ni- Al2O3 powder injection molding |
| FU Jie1，SHANG Feng2,3，LI Hua-qiang2，QIAO Bin2,3，CAO Zhen-wei1，SUN Wei2 |
1. School of Mechanical and Electrical Engineering， China University of Mining and Technology， Xuzhou 221116， China
2. School of Mechanical Engineering， Huaihai Institute of Technology， Lianyungang 222005， China
3. Jiangsu Key Laboratory of Large Engineering Equipment Detection and Control， Xuzhou Institute of Technology， Xuzhou 221111， China |
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Abstract Ni-Al2O3 feedstock with 55% (volume percent) powder loading and diverse content of Ni was prepared in mixing module of HAAKE PolyLab 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-Al2O3 composites using powder injection molding and laid foundation on research of Ni content on properties of Al2O3 ceramic.
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Received: 21 April 2015
Published: 01 February 2016
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2016, Vol. 26 
