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Updated: May 23, 2025

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Author Spotlight: Real-Time Imaging of Bonding in 3D-Printed Layers
Published on: September 1, 2023
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通过同步射线X射线衍射增材制造过程中高性能工程热塑性材料的界面异质性的观察和起源
Kirt A Page1,2,3, Jacob Crossno1,2, Mia Carrola1
1Materials and Manufacturing Directorate, Air Force Research Laboratory, WPAFB, Dayton, Ohio 45433, United States.
ACS applied materials & interfaces
|March 10, 2025
概括
聚乙烯基 (PEEK) 的3D打印显示,在添加新材料时,底层层具有显著的冷结晶. 这种现象会产生晶度梯度,这可能解释了3D打印零件的粘合性差.
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
- 聚合物科学 聚合物科学
背景情况:
- 3D打印聚合物中的异质性挑战了机械性能.
- 道路间粘合性差是基于挤出的3D打印中常见的问题.
- 在印刷过程中控制材料属性至关重要.
研究的目的:
- 调查3D打印零件中异质性的起源.
- 在聚乙烯基 (PEEK) 中绘制晶体形成和演变的地图.
- 了解印刷工艺对材料性能的影响.
主要方法:
- 利用基于同步子的在位X射线微差别.
- 采用红外热量测量技术进行温度测绘.
- 分析了单路宽,两路高的PEEK打印.
主要成果:
- 在第二次打印的道路中,结晶性形成的速度较慢,但达到的顺序比单路打印更高.
- 由于印刷床的导热性,第一条路的冷却速度比第二条更快.
- 在第二条道路沉积后,第一条道路发生了显著的冷结晶,形成了尖的梯度.
结论:
- 底层层的冷结晶是多层3D打印中的普遍现象.
- 这种诱导的冷结晶有助于道路间和界面间的粘合性较差.
- 了解这些梯度是提高3D打印聚合物性能的关键.
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