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| Micro-scale powder of Al-Ni-Co alloy and its SLM 3D-printed magnets |
| ZHU XiaoYu，LIU Tao，WANG Lie，WANG shuai，FANG Yikun |
| Functional Materials Research Institute, Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract Al-Ni-Co powder was prepared by inert gas atomization (IGA), and the maximum particle size of the
powder was less than 150 μm after the initial screening. The morphology, phase composition and magnetic properties
of Al-Ni-Co powder with different particle size range were studied by hall flowmeter, XRD, SEM and VSM.
The results showed that the spheroidization rate of the powder was about 95%. The fluidity of micro-powders in
the range of 50~80 μm is relatively the best. Due to small particle size, the composition segregation of micro-powders
under 20 μm is serious; 80~150 μm micro-powders's surface adsorps satellite small particles, the roughness is
poor; the magnetism of Al-Ni-Co powder is soft one, and the phases are AlNi and FeCo. Six groups of Al-Ni-Co
cylindrical magnets were prepared by SLM method with 20~80 μm Al-Ni-Co micro powder. The density and magnetic
properties of the magnets after heat treatment reached the performance of the cast Al-Ni-Co magnets, which
indicated that SLM could be used to prepare 3D-printed Al-Ni-Co magnets.
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Received: 12 May 2021
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2022, Vol. 32 
