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| Research on ball milling technology of W-Gd2O3-Al shielding material based on orthogonal test |
| WANG Yanli1，TANG Dewen1，HUANG Jinghao1，2，XIAO Weiwei1，2 |
| （1. School of Mechanical Engineering, University of South China, Hengyang 412000, China； 2. Key Laboratory
of Nuclear Emergency Safety Technology and Equipment, University of South China ,Hengyang 412000, China） |
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Abstract The W-Gd
2O3-Al mixed powder was prepared by high-energy ball milling method. The effects of ball
milling time, ball milling speed and pellet ratio on powder phase and particle size were analyzed by X-ray dif‐
fraction (XRD) and scanning electron microscopy (SEM) through orthogonal experiments, which provided the
best process parameters for the preparation of W-Gd2O3-Al composites by high-energy ball milling. The results
show that the pellet ratio has the most significant effect on the grain refinement, while the grinding time and
grinding speed have little effect on the grain refinement within the test range. Excessive extension of milling
time and increase of milling speed will not only reduce grain size, but also result in powder phase transforma‐
tion. The optimum grinding process combination is obtained by comprehensive analysis: the grinding speed is
400 r/min, the grinding time is 15 h, and the ball-material ratio is 10:1. The high energy ball milling with the
combination of the above process parameters has the advantages of stable phase transformation and moderate
collision frequency, which is conducive to powder refinement.
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Received: 17 April 2023
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Corresponding Authors:
唐德文（1976—），男，教授，博士生导师，主要研究方向为高速加工与超硬材料加工技术、先进制造与核电装备技术。
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2023, Vol. 33 
