期刊
REVIEW OF SCIENTIFIC INSTRUMENTS
卷 91, 期 1, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5128190
关键词
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资金
- Key Research Platforms and Research Projects of Universities in Guangdong Province [2018KZDXM062]
- Guangdong Innovative and Entrepreneurial Research Team Program [2016ZT06C279]
- Shenzhen Peacock Plan [KQTD2016053019134356]
- Research Platform for Crystal Growth and Thin-Film Preparation at SUSTech
- Shenzhen Development and Reform Commission Foundation for Shenzhen Engineering Research Center for Frontier Materials Synthesis at High Pressure
The advent of a large-volume high-pressure apparatus has led to the discovery of many new materials with exceptional properties for widespread applications such as superhard materials (e.g., diamonds). However, for most conventional devices, the pressure and temperature capabilities are often limited to 6 GPa and 2300 K, which severely impedes the study of materials at extended pressures and temperatures. In this work, we present experimental optimizations of the high-pressure cell assembly for cubic press with a focus on the improvement of its temperature capability, leading to a record temperature value of similar to 4050 K and largely extended pressure conditions up to similar to 10 GPa with a centimeter-sized sample volume. Pressures of the new assembly at high temperatures are investigated by the melting-point method, giving rise to a series of parallel isoforce loading lines associated with thermally induced pressure. For the first time, the high-pressure melting curve of tungsten carbide is determined up to 3800 K and 8 GPa, and single-crystal refractory materials of Mo, Ta, and WC are also grown using the optimized cell. Published under license by AIP Publishing.
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