研究目的
To fabricate high-performance metal matrix nanocomposites through laser additive manufacturing by preparing MWCNTs/TC4 nanocomposite powder using planetary ball-milling and studying its characteristics for optimal selective laser melting processing.
研究成果
A ball-milling time of 4 h at 300 rpm was optimal for preparing MWCNTs/TC4 nanocomposite powder for SLM, achieving a balance between homogeneous dispersion of MWCNTs and good powder flowability. This preparation method has great potential for fabricating high-performance metal matrix nanocomposites through laser additive manufacturing.
研究不足
The study is limited by the potential for severe plastic deformation and loss of spherical shape of the nanocomposite powder at increased milling times, which could affect the flowability and quality of SLM-processed parts.
1：Experimental Design and Method Selection:
The study used planetary ball-milling to disperse MWCNTs into TC4 powder, varying milling times to study the effect on powder characteristics.
2：Sample Selection and Data Sources:
Gas-atomized spherical Ti6Al4V powder and MWCNTs were used as starting materials.
3：List of Experimental Equipment and Materials:
A horizontal planetary ball mill (QM-3SP4), zirconia grinding bowl, stainless steel grinding balls, and a selective laser melting system equipped with a YLR-500 Ytterbium fiber laser were used.
4：Experimental Procedures and Operational Workflow:
MWCNTs/TC4 nanocomposite powder was prepared with varying milling times, followed by SLM processing to evaluate the quality of the nanocomposite powder.
5：Data Analysis Methods:
The morphology, particle size distribution, dispersion of MWCNTs, and flowability of the powder were characterized using SEM, EDX, laser particle size analyzer, and Hall flowmeter. XRD was used for phase identification.
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