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6CCVD Research

Control of the SiC Polytypes in SiC Bonded Diamond Materials

At a Glance

Section titled “At a Glance”
MetadataDetails
Publication Date2025-07-18
JournalCeramics
AuthorsMathias Herrmann, Jesus Andres Quintana Freire, Björn Matthey, Steffen Kunze, Sören Höhn
InstitutionsFraunhofer Institute for Ceramic Technologies and Systems
Citations1

Abstract

Section titled “Abstract”

Silicon carbide-bonded diamond materials produced by pressureless reaction infiltration of diamond preforms have high wear resistance and thermal conductivity, making them ideal for a range of industrial applications. During infiltration, the Si is typically converted to cubic ÎČ-SiC. The aim of the work was to investigate the extent to which the formation of hexagonal α-SiC can be achieved by adding α-SiC or AlN nuclei to the preform. Detailed microstructural investigations using XRD, high-resolution FE-SEM, and EBSD analyses show that both AlN and SiC serve as nuclei for α-SiC. Regardless of this, a large proportion of ÎČ-SiC forms on the surface of the diamonds. However, the added nuclei change the structure of the SiC framework that forms.

Tech Support

Section titled “Tech Support”

Original Source

Section titled “Original Source”

References

Section titled “References”
  1. 2001 - Low-Pressure Fabrication of Diamond-SiC-Si Composites [Crossref]
  2. 2017 - SiC-bonded diamond materials produced by pressureless silicon infiltration [Crossref]
  3. 2013 - Infiltration mechanism of diamond/SiC composites fabricated by Si-vapor vacuum reactive infiltration process [Crossref]
  4. 2013 - Fabrication of diamond/SiC composites by Si-vapor vacuum reactive infiltration [Crossref]
  5. 2024 - Ideal: A promising diamond-silicon carbide composite for enhanced amor [Crossref]
  6. 2021 - Reaction-Diffusion Mechanism of Synthesis in the Diamond-Silicon Carbide System [Crossref]
  7. 2023 - Effect of Diamond Phase Dispersion on the Properties of Diamond-SiC-Si Composites [Crossref]
  8. 2024 - Preparation of bimodal-diamond/SiC composite with high thermal conductivity [Crossref]

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