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Heat-treated glassy carbon under pressure exhibiting superior hardness, strength and elasticity

Journal Article · · Journal of Materiomics
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  1. Yanshan Univ., Qinhuangdao (China); Technical Univ. of Darmstadt (Germany)
  2. Yanshan Univ., Qinhuangdao (China)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
Glassy carbon (GC) is a type of non-graphitizing disordered carbon material at ambient pressure and high temperatures, which has been widely used due to its excellent mechanical properties. Here we report the changes in the microstructure and mechanical properties of GC treated at high pressures (up to 5 GPa) and high temperatures. The formation of intermediate sp2–sp3 phases is identified at moderate treatment temperatures before the complete graphitization of GC, by analyzing synchrotron X-ray diffraction, Raman spectra, and transmission electron microscopy images. The intermediate metastable carbon materials exhibit superior mechanical properties with hardness reaching up to 10 GPa and compressive strength reaching as high as 2.5 GPa, nearly doubling those of raw GC, and improving elasticity and thermal stability. The synthesis pressure used in this study can be achieved in the industry on a commercial scale, enabling the scalable synthesis of this type of strong, hard, and elastic carbon materials.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Alexander von Humboldt Foundation; China Postdoctoral Science Foundation; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1762417
Journal Information:
Journal of Materiomics, Journal Name: Journal of Materiomics Journal Issue: 1 Vol. 7; ISSN 2352-8478
Publisher:
Chinese Ceramic SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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