在不同的烧结速度下,不同含有单色和多层部分稳定的氧化的柔性强度
The International journal of prosthodontics
|August 7, 2024
概括
烧结速度会影响的屈曲强度,3Y,4Y和5Y yttria含量和多层色调显示出更高的强度. 快速烧结是可以接受的,但快速烧结会降低强度.
科学领域:
- 牙科材料科学 牙科材料科学
- 生物材料工程 生物材料工程
- 陶工程 陶工程 陶工程
背景情况:
- 的特性受到烧结过程的显著影响.
- 伊特里亚稳定是广泛用于牙科修复.
- 了解烧结效应对于优化材料性能至关重要.
研究的目的:
- 为了评估不同烧结速率对3,4和5mol% yttria的单色和多层氧化的屈曲强度的影响.
- 为了将烧结速率与微观结构和晶体相位变化相关联.
- 为了确定牙科石修复的最佳烧结参数.
主要方法:
- 270个石样本的制备 (单色和多层,3Y,4Y,5Y).
- 在常规 (10°C/分钟),快速 (35°C/分钟) 和速度 (70°C/分钟) 的速度下烧结.
- 三点曲试验用于曲强度 (σ),微观结构的 SEM 和晶体相的 XRD.
主要成果:
- 柔性强度受到yttria含量 (3Y>4Y>5Y),阴影图案 (多层>单色) 和烧结速率 (常规/快速>速度) 的显著影响.
- 在5Y石中观察到较高的颗粒大小.
- 3Y石显示出更高的四角形相,而5Y显示出更高的立方相.
结论:
- 柔性强度受到 yttria 含量,阴影图案和烧结速率的影响.
- 没有发现烧结速率对每个石类型的屈曲强度有显著影响.
- 建议定期和快速烧结以获得更高的强度,而快速烧结为成本效益高的修复提供了可接受的强度.
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