基于拉曼光谱的现场扫描测试系统
Yuechen Jiang1,2, Yang Ding1,2, Siyu Hou1,2
1National Key Laboratory of Automotive Chassis Integration and Bionics/School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130025, China.
The Review of scientific instruments
|August 19, 2025
概括
这项研究引入了拉曼光谱系统,用于在机械负荷时的现场材料表征. 开发的扫描平台准确地绘制了材料中的应力分布图,有助于了解材料故障机制.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 频谱学是一种光谱学.
背景情况:
- 精确地描述局部材料区域对于材料科学和纳米技术至关重要.
- 现场观测技术提供了机械洞察力,但受到不稳定的扫描系统的限制.
研究的目的:
- 开发基于拉曼光谱的现场扫描系统,用于在机械加载过程中进行非侵入性材料表征.
- 分析应力分布及其对材料在负载下行为的影响.
主要方法:
- 拉曼光谱与精密扫描模块和机械加载装置的整合.
- 使用低损耗的光学路径转向机制用于聚焦光束定位.
- 用于定量应力分析的光谱解卷和格子动态建模.
主要成果:
- 局部应力度和拉伸应力组件在维克斯缩影下在单晶中被确定.
- 在孔尖端和山脊区域附近的应力模式被绘制为地图.
- 确定了定量压力频率转换因子.
结论:
- 开发的平台可以在复杂的负载条件下实现多功能微结构性表征.
- 结果为建立微纳米尺度结构-属性关系提供了关键的见解.
- 未来的实现可以扩展到热,电和磁场控制.
相关概念视频
01:26Raman Spectroscopy Instrumentation: Overview
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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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01:20Raman Spectroscopy: Overview
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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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