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  4. SiC-bonded diamond materials produced by pressureless silicon infiltration
 
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2017
Journal Article
Titel

SiC-bonded diamond materials produced by pressureless silicon infiltration

Alternative
Wear-resistant SiC-bonded diamond materials produced by pressureless silicon infiltration
Abstract
Extremely hard, wear-resistant SiC-bonded diamond materials with diamond contents of approximately 45% to 60% by volume can be prepared by pressureless infiltration of shaped diamond compacts with silicon. Components with large dimensions can be produced as graded or ungraded materials. Graded components are composed of Si-infiltrated SiC base materials with diamond-SiC composite layers of 0.1 mm to several mm in thickness in regions with high loading. This creates the possibility of producing low-cost, wear-resistant components of various geometries and dimensions with bending strengths of 400-500 MPa, hardness values of 48 GPa, and fracture toughness levels of 4.5-5 MPa∙m1/2 for use in extreme wear conditions. Thermal conductivities of up to 500 W/mK were obtained, render these materials interesting for heat sinks.
Author(s)
Matthey, Björn
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Herrmann, Mathias
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Hörner, Martin
Fraunhofer-Institut für Werkstoffmechanik IWM
Geldern, Maike van
KSB Aktiengesellschaft
Kunze, Steffen
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Blug, Bernhard
Fraunhofer-Institut für Werkstoffmechanik IWM
Michaelis, Alexander
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Zeitschrift
Journal of Materials Research
Project(s)
EkoDiSc
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)
Thumbnail Image
DOI
10.1557/jmr.2017.218
Language
English
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Fraunhofer-Institut für Keramische Technologien und Systeme IKTS
Fraunhofer-Institut für Werkstoffmechanik IWM
Tags
  • SiC

  • silicon carbide

  • diamond

  • Diamant

  • Keramik

  • ceramics

  • microstructure

  • composite

  • infiltration

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