在实验性ATZ陶复合材料中,玻璃透,用Al2O3胡须增强
Tiago Moreira Bastos Campos1, Ana Carolina da Silva2, Bruno Roberto Spirandeli3
1Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of São Paulo (USP), Bauru, SP, Brazil.
Journal of the mechanical behavior of biomedical materials
|February 4, 2025
概括
这项研究增强了化硬化 (ATZ) 复合材料,使用化胡须和玻璃透,显著提高了断裂性和强度. 玻璃透增强了传统的ATZ强度,而胡须增强则提供了特定的烧结协议的好处.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程
- 复合材料 复合材料 复合材料
背景情况:
- 硬化 (ATZ) 复合材料是先进的陶,具有需要高机械性能的潜在应用.
- 提高ATZ的断裂性和强度对于扩大其在苛刻环境中的使用至关重要.
- 素胡须和玻璃透被探索为改善ATZ属性的方法.
研究的目的:
- 开发和表征硬化 (ATZ) 复合材料,这些复合材料用胡须增强,并经过玻璃透.
- 评估不同烧结协议对这些复合材料的微观结构和机械性能的影响.
- 将胡须增强的ATZ与传统的ATZ的性能进行比较,并评估玻璃透的好处.
主要方法:
- 高面积比的合金胡须的合成.
- 通过将3Y-TZP粉与酸胡须混合制造ATZ 90/10复合材料.
- 玻璃透的应用,使用玻璃和二醇的混合物.
- 根据两个不同的协议 (单阶段和两阶段的高温烧结) 烧结样品.
- 使用SEM,XRD,拉曼光谱,硬度,断裂性和双轴屈曲强度测试进行表征.
- 使用韦布尔分布和ANOVA进行统计分析.
主要成果:
- 合成的酸胡须表现出高的尺寸比 (10微米×200纳米).
- 透过玻璃的ATZ复合材料显示无形玻璃相,而不是晶体峰.
- 与传统的ATZ相比,具有酸胡须的ATZ表现出优越的断裂性和特征强度.
- 玻璃透显著提高了传统的ATZ的特性强度,而不管烧结协议.
- 烧结协议影响了复合材料中的玻璃分级的厚度和数量.
结论:
- 使用酸胡须的ATZ的开发有效地增加了双轴屈曲强度和断裂性.
- 玻璃分级显著提高了传统的ATZ的特性强度,在特定的烧结条件下,对胡须增强的ATZ有好处.
- 烧结协议在控制玻璃透特性和复合材料整体性能方面发挥着至关重要的作用.
相关概念视频
Pozzolans
883
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
Fly ash is...
883
Accelerators
384
Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
The effectiveness of calcium chloride can...
The effectiveness of calcium chloride can...
384
Superplasticizers
476
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
476
Additives and Fillers in Concrete
500
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
500
Alkali Aggregate Reaction in Concrete
807
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
807


