关于X射线计算机断层扫描准确性在聚合物基晶格结构的表征方面的定义的进展
Daniel Gallardo1, Lucía-Candela Díaz1, José Antonio Albajez1
1I3A, Universidad de Zaragoza, María de Luna 3, 50018 Zaragoza, Spain.
Polymers
|May 25, 2024
概括
射线计算机断层扫描 (XCT) 为晶格结构提供精确的维度质量控制,在精度和稳定性方面超过焦变微镜 (FVM). 对外部格子单元的XCT评估准确地代表了整个结构用于计量目的.
科学领域:
- 添加剂制造 添加剂制造 添加剂制造
- 计量学 计量学 计量学
- 材料科学 材料科学 材料科学
背景情况:
- 格子结构可以节省材料和改进零件设计,但会带来尺寸质量控制的挑战.
- 射线计算机断层扫描 (XCT) 是一种非破坏性技术,适用于描述复杂的内部几何形状.
- 目前XCT的不确定性估计通常依赖于用于有限区域的高分辨率设备,如焦点变异显微镜 (FVM).
研究的目的:
- 与更高分辨率的参考装置 (FVM) 相比,评估完整的格子结构时估计XCT的准确性.
- 评估 XCT 适用于增材制造格子结构的维度质量控制的适用性.
主要方法:
- 通过选择性激光烧结 (SLS) 制造的聚胺12 (PA12) 格子测试对象的实验测量.
- 用焦变微镜 (FVM) 对立方基格类型学的测量进行XCT数据的比较.
- 评估定性和定量分析,表面特征表征和支柱直径不确定性.
主要成果:
- 在格子结构的定性和定量分析中,XCT表现出更高的精度.
- 尽管XCT的分辨率低于FVM,但XCT精确地描述了表面细节,例如重新进入的特征.
- 在使用XCT的所有细胞中,标准偏差和支柱直径的不确定性更稳定,揭示了FVM重建问题.
结论:
- 与FVM相比,XCT提供了一种更精确,更稳定的方法来控制格子结构的尺寸质量.
- XCT可以在没有额外错误的情况下准确评估内部格子细胞,这表明外部细胞测量是整个结构的代表.
- XCT是复杂的增材制造几何体的计量评估的一个有价值的工具.
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