Journal
HIGH PRESSURE RESEARCH
Volume 37, Issue 4, Pages 507-515Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08957959.2017.1375491
Keywords
Kawai-type multi-anvil apparatus; tungsten carbide anvil; sintered diamond anvil; synchrotron; lower mantle
Categories
Funding
- DFG [KA-3434/7, KA-3434/8, KA-3434/9]
- BMBF [05K16WC2]
- Overseas Research Fellowship from the Scientific Research of the Japan Society for the Promotion of Science (JSPS)
- Grants-in-Aid for Scientific Research [15H05826, 17H01173, 15H05828, 17H01155, 15H05827, 15H05829, 15K21712, 16K13907, 15J09669, 17K05714, 15K05351] Funding Source: KAKEN
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We have expanded the pressure ranges at room and high temperatures generated in a Kawai-type multi-anvil apparatus (KMA) using tungsten carbide (WC) anvils with a high hardness of H-v=2700 and a Young's modulus of 660GPa. At room temperature, a pressure of 64GPa, which is the highest pressure generated with KMA using WC anvils in the world, was achieved using 1 degrees-tapered anvils with a 1.5-mm truncation. Pressures of 48-50GPa were generated at high temperatures of 1600-2000K, which are also higher than previously achieved. Tapered anvils make wide anvil gaps enabling efficient X-ray diffraction. The present pressure generation technique can be used for studying the upper part of the Earth's lower mantle down to 1200km depth without sintered diamond anvils.
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