介绍以低压驱动的软变形方法,以消除通过材料挤出制造的绿色组件中固有的空隙
Taehyeob Im1, Heungseok Oh1, Byeonghwa Goh2,3
1Department of Materials and Chemical Engineering, Hanyang University ERICA, Republic of Korea.
Heliyon
|April 10, 2024
概括
一种新的低压驱动软变形方法有效地减少了3D打印零件中的空隙. 这种后处理过程通过填补印刷层之间的空隙来提高材料密度和机械性能.
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
- 机械工程 机械工程
背景情况:
- 材料挤出 (MEX) 3D打印通常会导致打印组件内固有的空隙.
- 这些空隙可能会对最终部件的机械性能和整体性能产生负面影响.
- 开发后处理流程以减轻这些空隙对于提高MEX组件质量至关重要.
研究的目的:
- 引入和评估一种新的后处理工艺,低压驱动软变形,用于减少MEX组件中的空隙.
- 为了研究这种方法对材料粘度,空隙减少和机械性能的影响.
- 提供对负责空隙消除的微观结构机制的见解.
主要方法:
- 通过MEX打印的绿色组件在低压下经过热处理 (低压驱动的软变形).
- 通过对烧结样本的图像分析来测量孔隙性.
- 分析了拉伸强度和断裂表面,以比较处理和未处理的样本.
- 使用毛细管类风湿学和分子动力学模拟来了解粘度变化和键强度.
主要成果:
- 在软变形处理后,平均毛孔度从3.55%降至2.36%.
- 用软变形处理的烧结样品显示了机械性能中较窄的标准偏差.
- 低压条件增加了原料粘度 (450.341018.31 Pa·s),以最小的尺寸变化填补了轨道间的空隙.
- 分子动力学模拟表明,键强度增加了3.7倍,证实了有效消除轨道间空隙.
结论:
- 低压驱动软变形方法是一种有效的后处理技术,用于减少MEX组件中的空隙.
- 这一过程提高了烧结密度,提高了机械性能的一致性.
- 该方法提供了一种可行的方法来提高增材制造零件的质量和可靠性.
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