先进的陶具有治愈和分解的双重功能
Nobuhide Sekine1, Yasushi Nakajima2, Takahiro Kamo2
1Graduate School of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya-ku, Yokohama 240-8501, Kanagawa, Japan.
Materials (Basel, Switzerland)
|April 9, 2024
概括
具有YSZ矩阵中的ZrC颗粒的先进陶复合材料在超热蒸汽中表现出自我愈合和在空气中分解. 这种新型材料为高级应用提供可调节的特性.
科学领域:
- 材料科学 材料科学 材料科学
- 陶工程 陶工程
- 纳米技术纳米技术
背景情况:
- 先进的陶材料对于高温应用至关重要.
- 控制物质的行为,如自我愈合或分解,是一个关键的挑战.
- 伊特里亚稳定 (YSZ) 和碳化物 (ZrC) 复合材料具有独特的性能.
研究的目的:
- 开发具有双重功能的先进陶复合材料:自我愈合和分解.
- 为了研究超热蒸汽和空气对材料行为的影响.
- 了解导致强度恢复或降解的反应机制.
主要方法:
- 在YSZ矩阵复合材料中分散的ZrC颗粒的制造.
- 引入受控的表面裂 (大约. 120 微米). 这是一个很大的问题.
- 在400°C的超热蒸汽和空气下进行热处理,持续一个小时.
- 用于相位识别的X射线衍射 (XRD) 分析.
主要成果:
- 在超热蒸汽中进行热处理后观察到完全的强度恢复.
- 在空气中进行热处理后观察到的分解行为.
- 在这两种条件下,XRD证实了单克林ZrO2作为最终产品.
- 超热的蒸汽诱导了一种连锁反应,涉及转移稳定的中间体用于治愈.
结论:
- 开发的ZrC-YSZ复合材料根据处理环境表现出可调节的功能性质.
- 超热蒸汽通过H2O衍生中间体促进了独特的愈合机制.
- 材料的反应 (愈合与分解) 可以通过大气条件来控制.
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