增材制造的金属增强PLA和ABS复合材料的压缩性能
Meelad Ranaiefar1, Mrityunjay Singh2, Jonathan A Salem1
1NASA Glenn Research Center, Cleveland, OH 44135, USA.
Polymers
|July 27, 2024
概括
研究人员探索了用于3D打印的金属增强纤维,发现金属添加物如铁和钢增强了强度. 材料的方向对机械性能产生重大影响,这对于设计先进的轻量级组件至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 增材制造 增材制造 增材制造
- 聚合物复合材料 聚合物复合材料
背景情况:
- 多材料纤维使得高性能,轻量级,多功能元件的化纤维制造 (FFF) 成为可能.
- 了解处理-结构-属性关系是优化3D打印材料的关键.
研究的目的:
- 研究用磁铁,不钢,青铜,铜,和增强的PLA和ABS丝.
- 阐明这些金属聚合物复合材料中的复杂的加工-结构-性质关系.
- 分析金属强化和打印方向对机械性能的影响.
主要方法:
- 显微镜用于表征微观结构,金属横截面积和多孔性.
- 压缩测试平行和垂直于构建方向.
- 在不同负载方向下对断裂机制的评估.
主要成果:
- 破裂发生在印刷层 (垂直负载) 或层 wise 破裂 (平行负载) 中.
- 大多数钢筋丝 (Br-PLA,Cu-PLA,SS-PLA,Bi-ABS,W-ABS) 的产量强度取决于负载方向,但不是MI-PLA或纯ABS.
- MI-PLA和SS-PLA的压力强度高于Br-PLA和Cu-PLA;ABS的性能优于Bi-ABS和W-ABS.
结论:
- 打印方向对于3D打印元件的性能和应用至关重要.
- 不同的金属增强件为实现所需的多功能提供了权衡.
- 量身定制的聚合物复合材料对创新的3D打印结构具有重大潜力.
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