Structure and Chemistry of Interfaces in Silicon Carbide-Containing Materials

  • R. F. Davis
  • C. H. CarterJr.
  • S. R. Nutt
  • K. L. More
  • S. Chevacharoenkul
Part of the Materials Science Research book series (MSR, volume 21)


Transmission electron microscopy (TEM) and other techniques were employed to investigate the character of high and low angle boundaries and interfaces in several α-SiC-containing multiphase materials. In reaction-bonded SiC, the reaction of Si vapor with excess free C contained in an α-SiC matrix caused epitaxial growth of additional α-SiC and resultant sub-grain boundary formation. Climb-controlled deformation above 1773K caused the formation of additional, unique subboundaries in this material. In sintered α-SiC containing B and C, the occasionally predicted and reported amorphous boundary phase was not discerned in high resolution TEM or Auger analyses. The addition of MgO to an β-SiC whisker-containing Si3N4 composite resulted both in the formation of an amorphous phase and in the epitaxial crystallization of an MgO-containing silicate phase. Finally, ruby or eximer laser annealing of Ni-coated SiC caused the melting of the Ni and the diffusion of SiC into this molten phase. By comparison, the ion mixing of the Ni via the implantation of Si+ through this metal layer resulted in the sequential formation of numerous layers of varying chemistry. The following sections describe the several forms of these interphase regions and their effect on the structural properties of the various materials.


High Resolution Transmission Electron Microscopy Ruby Laser Mixed Surface Layer Moire Fringe Scanning Auger Microprobe 
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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • R. F. Davis
    • 1
  • C. H. CarterJr.
    • 1
  • S. R. Nutt
    • 2
  • K. L. More
    • 3
  • S. Chevacharoenkul
    • 1
  1. 1.Department of Materials Science and EngineeringNorth Carolina State UniversityRaleighUSA
  2. 2.Division of EngineeringBrown UniversityProvidenceUSA
  3. 3.Metals and Ceramics DivisionOak Ridge National LaboratoryOak RidgeUSA

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