在LEAP 6000 XR原子探测仪器中,使用降低的探测器效率对碳化物化合物的组成精度进行重新检查
Severin Jakob1, Mattias Thuvander1
1Department of Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.
概括
提高合金中的碳组成精度需要解决探测器的局限性. 一个新的网格降低了检测效率,最大限度地减少了原子探头分析期间碳离子聚类的错误.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 分析化学 分析化学
背景情况:
- 准确测量合金中的碳组成对于材料性能至关重要.
- 目前的探测器系统面临的局限性是由于碳蒸发作为聚类离子,导致探测器堆积和多次撞击事件.
- 这种现象导致碳组成分析中的不准确性.
研究的目的:
- 调查提高合金中碳组成测量的精度的方法.
- 了解和减轻碳离子聚类和探测器堆积的影响.
- 评估新一代原子探针仪器在碳分析方面的性能.
主要方法:
- 在原子探头仪器中,将网格放置在局部电极后面.
- 将探测器效率从52%降低到7%,以最大限度地减少多次撞击事件.
- 分析钢铁和其他合金中碳化物沉中的碳成分.
主要成果:
- 这项研究证实,由于探测器堆积而导致碳的偏好损失.
- 实施网格显著降低了多次撞击事件的比例.
- 较新的商业原子探测仪表显示,与老一代相比,碳组成的差异较大.
- 这种差异可能源于改变的激光物质相互作用,影响在多次撞击事件中金属离子检测.
结论:
- 探测器堆积严重影响合金中碳组成测量的准确性.
- 基于网格的方法可以有效地减少多次撞击事件,并提高碳分析的准确性.
- 需要进一步调查,以了解新一代原子探测器中观察到的差异,并优化它们的碳分析性能.
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