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高压力强度的碳化陶具有增强的机械性能

Zijun Qian^1,2, Kang Li^1,2, Yabin Zhou^1,2

¹College of Materials Science and Engineering, Nanjing Tech University, Puzhu South Road No. 30, Nanjing 211816, China.

Materials (Basel, Switzerland)

|August 14, 2025

概括

这项研究开发了使用优化液透 (LSI) 和纳米碳添加剂的高性能反应结合碳化 (RBSC) 陶. 新的RBSC陶具有卓越的机械强度,适用于苛刻的结构应用.

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:

反应结合碳化 (RBSC) 对于高压力应用至关重要.
传统的RBSC经常面临机械性能方面的局限性.
优化制造流程是提高RBSC属性的关键.

研究的目的:

通过优化的液透 (LSI) 工艺制造高性能RBSC陶.
调查多模 SiC 颗粒分级和纳米碳添加剂对 RBSC 性能的影响.
建立一个可扩展的战略,为RBSC设计极端机械环境.

主要方法:

采用液透 (LSI) 技术,采用多模式的SiC颗粒分级.
加入纳米碳黑 (0.6微米) 添加剂.
工程化的多孔预成型具有层次的SiC分布和量身定制的碳来源.
进行微结构分析以了解机械增强机制.

主要成果:

达到2393 MPa的压力强度和380 MPa的屈曲强度.
证明了同质的β-SiC形成和有效的裂纹偏移.
超细SiC颗粒 (0.5-2μm) 精炼了孔隙结构,并改善了的透.
与粗粒度系统相比,超细SiC的压力强度增加了23%.

结论:

优化的LSI工艺与层次的SiC和纳米碳添加剂产生了优越的RBSC陶.
微结构控制,特别是使用超细SiC颗粒,增强机械性能和负载转移.
这项工作提供了一种可扩展的方法,用于生产高压力结构部件的RBSC.

关键词:

压力强度的压力强度是什么液透的透情况颗粒分级的粒子分级.反应结合的碳化反应结合的碳化.剩余的是剩余的.

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