Abstract:

To obtain Cr₂O₃ powder for additive manufacturing with good dispersion and uniform particle size,Cr₂O₃ powder was ground by a planetary ball mill.The influence of ball to powder mass ratio (1∶1.5,1∶1.3,1∶1.1,1.1∶1,1.3∶1 and 1.5∶1) and the different balls mass ratio (6 and 10 mm in diameter,1∶2,1∶1,2∶1,3∶1,4∶1 and 5∶1) on the grinding effect were studied.The results show that when the ball to powder mass ratio is 1.3∶1,the Cr₂O₃ powder has the particle size of d₁₀=0.694 μm,d₅₀=2.042 μm,and d₉₀=4.569 μm,which is the smallest;and when the different balls mass ratio is 5∶1,the Cr₂O₃ powder has the particle size of d₁₀=0.550 μm,d₅₀=1.843 μm,and d₉₀=4.516 μm,which is the optimal.

Key words: chromium oxide, ball to powder mass ratio, different balls mass ratio, planetary ball mill, particle size

摘要：

为得到可用于增材制造的分散性好、粒度均匀的Cr₂O₃粉体,使用行星式球磨机对Cr₂O₃粉进行研磨,对球料质量比 (1∶1.5、1∶1.3、1∶1.1、1.1∶1、1.3∶1和1.5∶1)和不同球(直径分别为 6和 10 mm)质量比(1∶2、1∶1、2∶1、3∶1、4∶1和5∶1)两因素进行研究。结果表明,当球料质量比为1.3∶1时,粉体的d₁₀=0.694 μm,d₅₀=2.042 μm,d₉₀=4.569 μm,Cr₂O₃粒度最小;当不同球质量比为5∶1时,粉体的d₁₀=0.550 μm,d₅₀=1.843 μm,d₉₀=4.516 μm,为最优粒度。

关键词: 三氧化二铬, 球料质量比, 不同球质量比, 行星式球磨机, 粒度