通过常规造和选择性激光炼制成的六种Co-Cr合金的微观结构和机械表征
Youssef S Al Jabbari1, Konstantinos Dimitriadis2, Aref Sufyan3
1Director, Dental Biomaterials Research and Development Chair and Professor, Prosthetic Dental Sciences Department, College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
The Journal of prosthetic dentistry
|July 2, 2024
概括
与造相比,选择性激光化 (SLM) 显著改善了- (Co-Cr) 牙合金,通过减少孔隙性和增强机械性能. 这种先进的制造技术为牙科假肢提供了卓越的微观结构.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 牙科材料 牙科材料
背景情况:
- - (Co-Cr) 合金 (Co-Cr-Mo,Co-Cr-W,Co-Cr-Mo-W) 广泛用于牙科假肢. 在牙科假肢中广泛使用.
- 传统造和选择性激光化 (SLM) 是常见的制造方法.
- 基于合金类型和制造工艺的微观结构和机械性能存在有限的比较研究.
研究的目的:
- 进行Co-Cr-Mo,Co-Cr-W和Co-Cr-Mo-W合金的体外比较分析.
- 评估通过传统造和SLM生产的合金的微观结构和机械特性.
- 评估合金组成和制造方法对材料性能的影响.
主要方法:
- 分析了六种Co-Cr合金变种 (三种组成,两种制造方法:造和SLM).
- 微结构分析包括X射线,光学显微镜,SEM/EDS和XRD.
- 机械性质的评估是使用硬度和弹性指数的仪器化缩测试 (IIT) 和弹性模量的三点曲;通过双向ANOVA进行统计分析.
主要成果:
- 与造合金相比,SLM生产的合金具有明显较低的孔隙性和更均的微观结构.
- 所有SLM合金都比其造对应物显示出统计上更高的马斯硬度 (HM) 和弹性指数 (ηIT).
- SLM合金的弹性模量 (E) 比合金高得多,尽管E在相同制造方法中的合金组成之间没有显著差异.
结论:
- 制造过程 (造与SLM) 显著影响Co-Cr牙合金的孔隙性,微观结构和机械性能.
- SLM是制造Co-Cr牙假肢的优质方法,可以降低内部多孔性,具有均的微观结构,并提高机械性能.
- 与传统造合金相比,SLM制造的Co-Cr合金在牙科应用中提供了更好的材料特性.
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