PPA增强和烧结参数对Al/Mg/PPA复合材料的密度和硬度性能的影响
Osarue Osaruene Edosa1, Francis Kunzi Tekweme1, Peter A Olubambi2
1Department of Mechanical and Industrial Engineering Technology, University of Johannesburg, Johannesburg 2028, South Africa.
Materials (Basel, Switzerland)
|March 27, 2025
概括
农业废弃物,特别是花皮灰 (PPA),被用来制造可持续的Al/Mg/PPA复合材料. 这些新型复合材料显著提高了硬度和密度,使它们适合工业应用.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续制造 可持续制造 可持续制造
- 复合材料 复合材料 复合材料
背景情况:
- 农业废物利用是可持续制造业的关键.
- 开发具有增强性能的新型复合材料对于工业进步至关重要.
- 草皮灰 (PPA) 是一种从农业废物中提取的潜在增强材料.
研究的目的:
- 为了研究制造Al/Mg/PPA复合材料,使用木皮灰 (PPA) 作为强化材料.
- 分析PPA重量分数和火花等离子体烧结 (SPS) 参数对复合材料密度和硬度的影响.
- 评估制造复合材料的微观结构特征和机械性能.
主要方法:
- 通过球磨和火花等离子体烧结 (SPS) 制造Al/Mg/PPA复合材料.
- 对微结构特征,相对密度和微硬度的分析.
- 使用差异分析 (ANOVA) 来确定重要因素的统计分析.
主要成果:
- 在矩阵内均分布的PPA增强,缺陷最小.
- 增加了相对密度,并降低了随着烧结温度升高的孔隙性.
- 达到77 HV的最大微硬度,比基材提高86.89%.
- 烧结温度和PPA显著影响了相对密度,而PPA显著影响了微硬度.
结论:
- 使用农业废物 (PPA) 制造的Al/Mg/PPA复合材料具有增强的机械性能.
- 这项研究证实了使用香皮灰作为金属矩阵复合材料的增强剂的可行性.
- 这些可持续复合材料由于其性能提高,对各种工业应用具有前景.
相关概念视频
Pozzolans
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 a...
Fly ash is a...
Accelerators
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...
Plasticizers
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Superplasticizers
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,...


