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Synthesis, crystal ...
Synthesis, crystal structure, and properties of stoichiometric hard tungsten tetraboride, WB4
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- Bykova, Elena (author)
- Univ Bayreuth, Germany; Carnegie Inst Sci, DC 20015 USA
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- Ovsyannikov, Sergey V (author)
- Univ Bayreuth, Germany
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- Bykov, Maxim (author)
- Univ Cologne, Germany
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- Yin, Yuqing (author)
- Univ Bayreuth, Germany; Shandong Univ, Peoples R China
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- Fedotenko, Timofey (author)
- DESY, Germany
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- Holz, Hendrik (author)
- Univ Kassel, Germany; Friedrich Alexander Univ Erlangen Nurnberg, Germany
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- Gabel, Stefan (author)
- Friedrich Alexander Univ Erlangen Nurnberg, Germany
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- Merle, Benoit (author)
- Univ Kassel, Germany; Friedrich Alexander Univ Erlangen Nurnberg, Germany
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- Chariton, Stella (author)
- Univ Chicago, IL 60637 USA
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- Prakapenka, Vitali B. (author)
- Univ Chicago, IL 60637 USA
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- Doubrovinckaia, Natalia, Gästprofessor (author)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Univ Bayreuth, Germany
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- Goncharov, Alexander F. (author)
- Carnegie Inst Sci, DC 20015 USA
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- Dubrovinsky, Leonid (author)
- Univ Bayreuth, Germany
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(creator_code:org_t)
- 2022
- 2022
- English.
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In: Journal of Materials Chemistry A. - : ROYAL SOC CHEMISTRY. - 2050-7488 .- 2050-7496. ; 10:37, s. 20111-20120
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Tungsten tetraboride has been known so far as a non-stoichiometric compound with a variable composition (e.g. WB4-x, WB4+x). Its mechanical properties could exceed those of hard tungsten carbide, which is widely used nowadays in science and technology. The existence of stoichiometric WB4 has not been proven yet, and its structure and crystal chemistry remain debatable to date. Here we report the synthesis of single crystals of the stoichiometric WB4 phase under high-pressure high-temperature conditions. The crystal structure of WB4 was determined using synchrotron single-crystal X-ray diffraction. In situ high-pressure compressibility measurements show that the bulk modulus of WB4 is 238.6(2) GPa for B = 5.6(0). Measurements of mechanical properties of bulk polycrystalline sub-millimeter size samples under ambient conditions reveal a hardness of similar to 36 GPa, confirming that the material falls in the category of superhard materials.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Bykova, Elena
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Ovsyannikov, Ser ...
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Bykov, Maxim
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Yin, Yuqing
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Fedotenko, Timof ...
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Holz, Hendrik
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Gabel, Stefan
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Merle, Benoit
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Chariton, Stella
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Prakapenka, Vita ...
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Doubrovinckaia, ...
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Goncharov, Alexa ...
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Dubrovinsky, Leo ...
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Materials Chemis ...
- Articles in the publication
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Journal of Mater ...
- By the university
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Linköping University