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

SiC-bonded diamond materials produced by pressureless silicon infiltration

Other Title
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  orcid-logo
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Journal
Journal of Materials Research  
Project(s)
EkoDiSc
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)  
DOI
10.1557/jmr.2017.218
Language
English
Fraunhofer-Institut für Keramische Technologien und Systeme IKTS  
Fraunhofer-Institut für Werkstoffmechanik IWM  
Keyword(s)
  • SiC

  • silicon carbide

  • diamond

  • Diamant

  • Keramik

  • ceramics

  • microstructure

  • composite

  • infiltration

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