[多孔表面结构对3D打印的疲劳强度的影响]
Jianxiao Zhao1, Qian Ding1, Wenjin Li1
1Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
概括
孔隙表面结构显著降低了3D打印的疲劳强度,较大的孔隙导致较低的强度. 优化材料和表面设计对于提高立体石刻仪器 (SLA) 嵌体的机械性能至关重要.
科学领域:
- 生物材料科学 生物材料科学
- 增材制造 增材制造 增材制造
- 机械工程 机械工程
背景情况:
- 立体石墨仪器 (SLA) 能够3D打印,这种材料有可能用于牙科植入物.
- 表面结构显著影响陶材料的机械性能和疲劳强度.
- 了解孔度对石疲劳性能的影响,对于植入物设计至关重要.
研究的目的:
- 为了研究表面多孔微结构对SLA制造的合金疲劳强度的影响.
- 为优化3D打印石植入物的表面设计提供数据驱动的见解.
主要方法:
- 使用SLA制造的石样品被分为无孔,200微米多孔和400微米多孔的类别.
- 使用显微镜分析了表面形态,粗度,孔径参数和粒径大小.
- 柔性强度通过三点曲测试来确定,疲劳强度通过疲劳测试来评估.
- 使用碎形分析和X射线衍射来了解故障机制和晶体相稳定性.
主要成果:
- 表面粗度和粒度大小在不同组之间没有显著差异.
- 与有孔的样本相比,无孔的体表现出明显更高的曲和疲劳强度.
- 疲劳强度随着孔隙大小的增加而降低 (200μm > 400μm).
- 裂的起源主要是内部缺陷,毛孔,入和印刷层连接.
结论:
- 表面多孔性对SLA打印的疲劳强度产生不利影响.
- 较大的孔隙大小导致疲劳强度的显著降低.
- 未来的研究应该专注于改进SLA材料和工艺,以及优化表面设计,以提高3D打印的机械完整性,用于生物医学应用.
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