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陶基准材料的断裂性和断裂分析
1Department of Biomedical Materials Science, University of Mississippi Medical Center, Room D528, 2500 North State Street, Jackson, MS 39216-4505, USA.
概括
一种新的碎形维度测量方法可以准确预测易碎的陶碎裂性. 这种技术应用于玻璃和化,为传统方法提供了可靠的替代方案.
科学领域:
- 材料科学 材料科学 材料科学
- 断裂力学 断裂力学 断裂力学
- 表面科学是一门学科.
背景情况:
- 在易碎的陶中测量断裂性对于材料设计和安全至关重要.
- 现有的断裂性测定方法可能是复杂和耗时的.
- 分形几何学为表征复杂的断裂表面提供了一种新的方法.
研究的目的:
- 评估一种新的碎形维度测量方法,用于确定易碎陶的断裂性.
- 通过碎形分析获得的断裂性值与曲法 (ASTM C1421) 中标准表面裂纹的值进行比较.
- 调查噪声过对断层尺寸和断层表面粗度测量的影响.
主要方法:
- 使用折 flexure 方法的表面裂和一种新的碎形分析方法来测量断裂性.
- 使用Minkowski Cover算法在原子力显微镜 (AFM) 对环氧复制品的扫描上计算碎形维度.
- 基准材料包括玻璃和化标准参考材料 (SRM2100).
主要成果:
- 碎形分析方法的断裂性值与玻璃的屈曲方法中的表面裂相当 (1.03 ± 0.07 MPa·m1/2与0.97 ± 0.18 MPa·m1/2).
- 对于化,与曲方法 (4.62 ± 0.14 MPa·m1/2) 相比,碎形分析导致碎裂性较低 (2.54 ± 0.07 MPa·m1/2).
- 噪声过对两种材料的断裂表面粗度 (Rz) 没有显著影响.
结论:
- 开发的碎形分析方法为预测易碎陶的断裂性提供了一种可行的方法.
- 这种方法显示出估计未知故障应力样本基线骨折性的潜力.
- 可能需要进一步的研究来协调化断裂性测量中观察到的差异.
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