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Updated: Jul 13, 2026

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在高压和高温下,钻石粉的密集化和表面碳转化

Rongqi Mao^1,2,3, Xiwei Cui^2,3, Jinglin Hao^2,3

¹College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.

Materials (Basel, Switzerland)

|April 9, 2024

概括

研究人员使用高压,高温 (HPHT) 压缩开发了一种新的无催化剂的多钻石板. 本研究详细介绍了HPHT处理如何影响钻石密度和表面碳转化,这对于多晶钻石应用至关重要.

科学领域:

材料科学材料科学材料科学
固态物理固态物理
纳米技术纳米技术

背景情况:

多晶钻石 (PCD) 是通过各种方法合成的,高压,高温 (HPHT) 处理是关键技术.
了解HPHT处理期间的微结构和化学转换对于优化PCD特性至关重要.

研究的目的:

在没有催化剂的情况下,在HPHT压缩下研究钻石粉的密度和钻石表面sp3转化为sp2碳的变化.
量化分析影响这些转变的因素和由此产生的余应力.

主要方法:

钻石粉的高压,高温 (HPHT) 压缩.
微观结构的表征.
拉曼光谱分析用于相位识别和残余应力测量.
电阻测量仪. 电阻测量仪.
有限元计算. 有限元计算.

主要成果:

钻石粉末的密度和sp3-to-sp2碳转化受到压力,温度和钻石颗粒大小的显著影响.
在更高的温度和更低的压力下,更细的钻石颗粒显示了sp2碳形成的增加.
局部残余应力随着钻石颗粒大小的增加而增加,这归因于接触点的减少和局部压力的增加,得到有限元素分析的支持.

结论:

这项研究提供了在HPHT处理过程中钻石粉密度和表面碳转换的定量数据.
这些发现对于优化多晶钻石 (PCD) 的烧结和其他HPHT钻石应用非常有价值.
粒子大小,压力,温度和sp2碳形成之间的关系为材料设计提供了洞察力.

关键词:

拉曼光谱法拉曼光谱法密集化密集化是一种钻石颗粒大小钻石颗粒大小高压和高温的高压和高温.多晶体钻石多晶体钻石

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