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研究轻质陶矩阵-较少的合成泡由Cenosphere使用火花等离子烧结组成

Toms Valdemars Eiduks¹, Reinis Drunka¹, Vitalijs Abramovskis²

¹Institute of Materials and Surface Technologies, Riga Technical University, P. Valdena str. 7, LV-1048 Riga, Latvia.

Materials (Basel, Switzerland)

|January 23, 2024

概括

煤层 (CS) 的火花等离子体烧结产生多孔的陶. 较高的温度和较小的模具增加了密度和强度,而孔隙性减少,与大米模型保持一致.

科学领域:

材料科学材料科学材料科学
陶工程陶工程
粉末金工艺在粉末金工艺

背景情况:

煤层 (CS) 是燃烧煤的副产品,为陶材料提供低成本填充材料的潜力.
与传统方法相比,火花等离子烧结 (SPS) 是一种先进的巩固技术,可以在较低的温度下快速加热和凝结材料.

研究的目的:

调查烧结温度,模具直径和层尺寸对使用SPS生产的多孔陶材料的性能的影响.
为了确定最佳的加工参数,以实现所需的密度,多孔度和基于CS的陶的压力强度.

主要方法:

通过火花等离子体烧结,使用半球 (CS) 制备了多孔陶材料.
系统地研究了不同烧结温度 (1050-1300°C),模具直径 (20,30,50mm) 和CS颗粒大小 (63-150μm和150-250μm) 的影响.
测量了关键材料特性,包括收缩,表面密度,总孔径,开/闭孔径和压力强度.

主要成果:

烧结收缩开始于900°C,并随着温度的增加而增加,同时随着模具直径的增加而减少.
表面密度随着烧结温度的增加而增加,取决于加工条件的值从0.54到2.3g·cm−3不等.
随着烧结温度从1050°C上升到1250°C,总孔隙度从61.5%降至3.9%.
压力强度随着烧结温度的增加而显著增加,在1300°C烧结的20毫米模具中,CS 63-150 μm的压力强度达到312 MPa.

结论:

发光等离子烧结是有效的生产有孔的陶材料从层.
烧结温度和模具直径是控制产生的陶密度,多孔度和机械性能的关键参数.
压力强度和多孔度之间的观察到的关系与赖斯模型一致,表明基于微观结构的可预测的机械行为.

关键词:

这就是SiO2二氧化.XRD XRD 在线观看表面的密度表面的密度太空层 (cenospheres) 是一个太空层.压力强度压力强度的压力强度.没有矩阵的合成泡.多孔性多孔性收缩时间收缩时间在火花等离子烧结过程中,火花等离子烧结.

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