通过两步烧结工艺制备陶
Jiawen Yang1,2, Liwen Lei1, Jinyong Zhang1,2
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel, Switzerland)
|May 7, 2025
概括
对陶进行了火花等离子烧结 (SPS) 和传统无压烧结 (CS) 的研究. 结合SPS和CS的两步烧结方法可以将曲强度提高19%.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程 陶工程
- 粉末金工艺 在粉末金工艺
背景情况:
- 陶被广泛使用,但实现最佳密度和强度是具有挑战性的.
- 了解谷物生长和密集化动力学对于物质属性控制至关重要.
- 传统的无压烧结 (CS) 往往需要很长的加工时间,可能无法实现完全的密集.
研究的目的:
- 在火花等离子体烧结 (SPS) 和CS下研究陶中颗粒生长和密集化动力学.
- 提出和验证两步烧结 (TSS) 方法,以提高陶的性能.
- 通过优化烧结策略来增强陶的柔性强度.
主要方法:
- 在SPS和CS下对谷物生长和密集化动态进行比较分析.
- 确定早期和晚期烧结阶段的密化激活能量.
- 实施两步烧结 (TSS) 工艺:最初的SPS,其次是CS.
- 通过TSS和CS生产的陶的柔性强度的评估.
主要成果:
- 在陶中,颗粒的生长主要发生在SPS和CS下达到烧结"结点"后.
- 密集的激活能量在早期和晚期阶段之间,以及SPS和CS之间有很大的差异.
- 拟议的两步烧结 (TSS) 方法成功使陶变密.
- 通过TSS生产的陶具有489.6MPa的屈曲强度,比单纯的CS提高了19%.
结论:
- 烧结"结点"是一个关键参数,影响中粒的生长.
- 一种两步烧结 (TSS) 方法是有效的,利用SPS进行快速密集和CS进行最终的微观结构控制.
- TSS提供了一种可行的途径,可以显著提高陶的机械性能,特别是曲强度.
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