对于4 Mbar以上的大型样本体积,探索 toroidal anvil 配置文件
Claire C Zurkowski1,2, Jing Yang3, Francesca Miozzi3
1Earth and Planets Laboratory, Carnegie Institution for Science, 5241 Broad Branch Road, NW, Washington, DC, 20015, USA. zurkowski1@llnl.gov.
Scientific reports
|May 18, 2024
概括
现在,更大的圆形钻石形电池 (DAC) 实现了多兆瓦的静态压缩,采用多种样本负载. 这项研究验证了它们在先进材料和行星科学研究中超过4 Mbar的性能.
科学领域:
- 高压物理和材料科学 高压物理和材料科学
- 行星科学和地质物理学
- 钻石子细胞技术技术的钻石子
背景情况:
- 圆形和双阶段钻石形电池 (DAC) 实现高静态压力 (4-10 Mbar),但样品体积有限.
- 在DAC中较大的样本量对于物理学,化学和行星科学中的各种应用至关重要.
- 探索行星内部需要在极端的压力和温度下对材料进行表征.
研究的目的:
- 为了研究更大的 toroidal DAC 配置文件,以提高样本体积能力.
- 测试和验证新型大型形形设计的性能.
- 为了实现材料科学和行星内部研究的新研究途径.
主要方法:
- 对 toroidal DAC 配置文件进行代测试,具有不同的 torus/shoulder 深度和 culet 直径 (30-50 μm).
- 使用白金 (Pt) 尺度进行压力校准.
- 状态方程 (EOS) 测量使用金 (Au) 和 (Re) 作为 300 K 的压力标准.
主要成果:
- 一个30微米的形形DAC配置文件实现了最大压力为414(1) GPa.
- 黄金和的压力-体积 (P-V) 数据与外推的高达4Mbar (在1%以内) 的液态EOS一致.
- 开发的 toroidal anvils 显示出可靠的性能超过 4 Mbar.
结论:
- 大型形DAC已被验证用于超过4Mbar的压力.
- 这些子为各种样本加载和激光加热实验提供了坚固的平台.
- 这一进步支持未来对超级地球和亚海王星内部条件和新材料合成的研究.
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