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Related Experiment Video

Updated: Jun 16, 2026

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

Robust bulk silicon carbide polymorphs sintered from collapsed hollow mesoporous structure.

Pengpeng Qiu1, Yi Zhou1, Yuqi Zhu1

  • 1State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering, Donghua University, Shanghai, China.

Nature Communications
|June 13, 2026
PubMed
Summary

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This study developed a novel method for synthesizing silicon carbide (SiC) ceramics at lower temperatures. Hollow mesoporous SiC powders enable near-full densification at 1750 °C, enhancing mechanical properties for extreme applications.

Area of Science:

  • Materials Science
  • Ceramics Engineering
  • Nanotechnology

Background:

  • Bulk silicon carbide (SiC) ceramics are crucial for extreme environments.
  • Conventional SiC synthesis requires high temperatures (>2100 °C) or additives, limiting applications.

Purpose of the Study:

  • To develop a straightforward strategy for densifying SiC ceramics at lower temperatures.
  • To achieve enhanced mechanical properties in SiC through a novel powder structure.

Main Methods:

  • Utilized hollow mesoporous SiC powder.
  • Employed spark plasma sintering (SPS) at 1750 °C.
  • Analyzed structural characteristics and mechanical properties.

Main Results:

  • Achieved 99.2% relative density at 1750 °C.

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Last Updated: Jun 16, 2026

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices
09:31

Surface Properties of Synthesized Nanoporous Carbon and Silica Matrices

Published on: March 27, 2019

Negative Additive Manufacturing of Complex Shaped Boron Carbides
06:45

Negative Additive Manufacturing of Complex Shaped Boron Carbides

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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

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  • Hollow structure facilitated rapid densification via collapse into nanofragments.
  • Resulting SiC exhibited fine grains (200-300 nm), clean boundaries, and mixed polytypes (2H, 4H, 3C).
  • Superior mechanical properties: nanoindentation hardness > 35.0 GPa, Vickers hardness 31.8 GPa, flexural strength 625.32 MPa.

    • Conclusions:

    • The hollow mesoporous structure is effective for low-temperature SiC densification.
    • Enhanced mechanical properties are attributed to lattice distortions from stacking faults, nano-twins, and polytypic boundaries.
    • This method offers a promising route for producing high-performance SiC ceramics.