一种先进的脱酸盐的表面性能和屈曲疲劳强度
Júlia Saccol Freitas1, Luiza Freitas Brum Souza1, Gabriel Kalil Rocha Pereira1
1MSc and PhD Post-Graduate Program in Oral Science, Federal University of Santa Maria (UFSM), Santa Maria, Rio Grande do Sul State, Brazil.
Journal of the mechanical behavior of biomedical materials
|October 7, 2023
概括
这项研究比较了先进的二酸盐 (ALD) 陶与二酸盐 (LD) 和 (4Y-PSZ). 体表现出优越的疲劳强度和生存率,而ALD表现出最低的性能和最高的可变性.
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
- 牙科陶 牙科陶 的使用.
背景情况:
- 牙科修复需要具有优良机械性能和表面完整性的材料.
- 二氧化和基陶广泛使用,但它们的比较疲劳行为需要进一步调查.
- 先进的配方旨在提高现有陶系统的性能.
研究的目的:
- 为了比较先进的脱酸盐 (ALD) 陶与传统的脱酸盐 (LD) 和4%的伊特里亚稳定 (4Y-PSZ) 的表面性能和疲劳机械行为.
- 为了评估这些牙科陶材料的屈曲疲劳强度,循环疲劳性能,表面粗度和硬度.
- 为了评估疲劳负荷下的结构可靠性和故障机制.
主要方法:
- 制造了4Y-PSZ,LD和ALD的样本,并使用粗计进行了表面粗度分析 (Ra,Rz).
- 双轴屈曲疲劳测试使用步骤测试方法进行,以确定疲劳强度和衰竭周期 (CFF).
- 测量了硬度 (维克斯),并进行了统计分析,包括生存分析 (卡普兰-梅尔,曼特尔-考克斯) 和韦布尔可靠性分析.
主要成果:
- 与LD和ALD相比,4Y-PSZ表现出明显更高的屈曲疲劳强度 (FFS),CFF和生存率.
- ALD显示了最低的FFS (215 MPa) 和CFF (11,908个周期),以及较低的韦布尔模块 (FFS的m=6.63,CFF的m=1.27),表明结构可靠性较低.
- ALD表现出最低的表面粗度 (Ra=0.07 μm,Rz=1.05 μm),而4Y-PSZ和LD具有更高的,类似的粗度值. 是最硬的材料.
结论:
- 先进的脱酸盐 (ALD) 与传统的脱酸盐 (LD) 和4%的伊特里亚稳定 (4Y-PSZ) 相比,具有较低的屈曲疲劳强度和较低的结构可靠性.
- 尽管拥有最光滑的表面,但ALD的疲劳性能受到损害,这表明单独的表面性能不能保证优越的机械性能.
- 在牙科修复中,仍然是要求高耐疲劳性和可靠性的高要求应用的优质材料.
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