铸造技术2025，Vol.46Issue(12)：1223-1235,13.DOI:10.16410/j.issn1000-8365.2025.5226
SiC颗粒对LPBF成形TiB2/AlSi10Mg复合材料冶金质量与性能的影响
Effect of SiC Particles on the Metallurgical Quality and Properties of TiB2/AlSi10Mg Composites Fabricated by Laser Powder Bed Fusion
摘要
Abstract
The size and content of SiC particles play crucial roles in determining the metallurgical quality and mechanical properties of particle-reinforced aluminum matrix composites(PAMCs)fabricated via laser powder bed fusion(LPBF).TiB2/AlSi10Mg prealloyed powder was used as the matrix,and SiC particles with different sizes and volume fractions(5 μm-5 vol.％,5 μm-10 vol.％,and 20 μm-10 vol.％)were incorporated through mechanical mixing.The effects of the SiC particle size and content on the densification behavior,process window,metallurgical defects,and mechanical properties were systematically investigated.The results show that increasing the SiC content or particle size reduces densification and narrows the processing window.The maximum relative densities of the 5 μm-5 vol.％,5 μm-10 vol.％,and 20 μm-10 vol.％samples are 99.1％,98.2％,and 96.9％,respectively.Excessive addition or larger SiC particles tend to induce porosity,cracking,and agglomeration defects,deteriorating the forming quality.The 5 vol.％SiC sample exhibits a microhardness of 170 HV and a Young's modulus of 113.8 GPa,whereas those of the 10 vol.％SiC sample increase to 200 HV and 130.6 GPa,respectively.A moderate SiC content combined with smaller particle size is beneficial for achieving high densification and superior mechanical properties.关键词
激光粉末床熔融/SiC颗粒尺寸与含量/致密度/冶金缺陷/力学性能Key words
laser powder bed fusion/SiC particle size and content/relative density/metallurgical defect/mechanical property分类
矿业与冶金引用本文复制引用
耿龙,吴凡,彭艺杰,党铭吉,范伟,谭华,张凤英,林鑫..SiC颗粒对LPBF成形TiB2/AlSi10Mg复合材料冶金质量与性能的影响[J].铸造技术,2025,46(12):1223-1235,13.基金项目
中国国防基础研究基金(JCKY2022204B005) （JCKY2022204B005）
