增材制造的热塑性聚胺复合材料的环境稳定性
Michael J Imburgia1, Jessica L Faust1, Johan Ospina Buitrago1
1Markforged, Inc., Waltham, MA 02451, USA.
Polymers
|August 26, 2023
概括
紫外线和水喷雾暴露对增材制造的碳纤维增强聚胺的拉伸和屈曲强度影响最小6. 伊索德冲击强度增加,涂料在不损害机械性能的情况下改善了外观.
科学领域:
- 材料科学 材料科学 材料科学
- 添加剂制造 添加剂制造 添加剂制造
- 聚合物科学 聚合物科学
背景情况:
- 增材制造 (AM) 使汽车,航空航天和电气行业的复杂零件生产成为可能.
- 环境耐用性对于最终用途的AM部件的合格至关重要.
- 用碳纤维增强的聚胺6混合物为AM提供了理想的机械性能.
研究的目的:
- 评估紫外线和喷水暴露对增材制造的聚胺机械性能的影响 6.
- 评估暴露样本上的保护涂层的性能.
- 确定这些材料适用于苛刻环境的适用性.
主要方法:
- 化丝制造 (FFF) 用于生产用短和连续的碳纤维增强的聚胺6试样.
- 样品经历了1000小时的紫外线和水喷雾暴露,每ASTM G155周期1.
- 在暴露和对照样本上进行了拉伸,曲和Izod冲击测试.
- 涂层样品 (Krylon® Fusion All-In-One®,JetFlex®聚氨原料) 与未涂层样品进行了比较.
主要成果:
- 拉力和屈曲强度的保持率分别在控制值的84-100%和88-100%之间.
- 伊佐德冲击强度显著增加,从控制值的104-201%不等.
- 与未涂层暴露样品相比,涂层样品保持了机械性能,并且显示出更好的视觉外观.
结论:
- 增材制造的碳纤维增强聚胺6具有良好的抗紫外线和水喷雾暴露性.
- 通过这种环境暴露,冲击强度可以提高.
- 保护性涂层有效地保护机械完整性,并改善暴露的AM部件的美学效果.
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