结合剂添加剂和不同烧结方法对牛酸的机械性能的综合影响
P R Minim1, L J de Azevedo-Silva1, B M Ferrairo2
1Department of Prosthodontics and Periodontics, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
概括
没有结合剂的传统烧结增强了来自牛骨的酸 (HA) 生物陶的机械性能. 这项研究发现,省略聚乙烯 (PVB) 结合剂改善了HA材料的双轴屈曲强度和弹性模量.
科学领域:
- 生物材料科学 生物材料科学
- 材料工程 材料工程 材料工程
- 生物陶是生物陶的产品之一.
背景情况:
- 来自牛骨的酸 (HA) 是一种用于牙科的生物相容生物材料.
- 密集的HA生物陶需要微观结构增强,以便在苛刻的应用中提高机械性能.
- 控制陶加工步骤对于增强HA特性至关重要.
研究的目的:
- 评估聚乙烯 (PVB) 添加和两种烧结方法 (传统和两步) 对牛HA生物陶的机械性能的影响.
- 确定最佳的加工条件,以实现HA生物陶中卓越的机械性能.
主要方法:
- 从牛骨中提取和转化HA的纳米粒子.
- 根据ISO 6872标准将HA单轴和同静压成磁盘.
- 使用XRD,DTA,FTIR,SEM和密度测量的表征; 机械测试包括双轴屈曲强度 (BFS) 和弹性模量.
主要成果:
- 无论是PVB添加还是烧结方法都没有显著改变HA的化学和结构特征.
- 没有粘合剂 (HWC) 的传统烧结组表现出最高的机械性能.
- HWC 组实现了 109.0 MPa 的 BFS 和 105.17 GPa 的弹性模量.
结论:
- 没有结合剂的传统烧结在多晶牛HA生物陶中产生了优越的机械性能.
- 处理参数,特别是粘合剂缺失和传统烧结,对于优化HA机械性能至关重要.
- 这些发现提供了关于为需要高机械强度的应用量身定制HA生物陶的见解.
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