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Research Opportunities for Materials with Ultrafine Microstructures (1989) / Chapter Skim
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Pages 14-16

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From page 14...
... Because of the limitations in traditional powder metallurgy processing, it has not yet been possible to extend the range of such measurements below 1 Am particle size. The challenge, therefore, is to devise new processing routes for significantly reducing the scale of bicontinuous metal-ceramic composite structures.
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From page 15...
... The DCCAs minimize differential drying stresses by minimizing differential rates of evaporation and ensure a uniform thickness of the solid network that must resist the drying stress. Achieving a uniform scale of structure at "elation also results in uniform growth of the network during aging, which thereby increases the strength of the gel and its ability to resist drying stresses.
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From page 16...
... . Recently, the sol-gel process has been investigated widely for the synthesis of a variety of glasses and crystalline materials suitable for ceramic matrix composites (Hench and Ulrich, 1986~.
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Key Terms

  • ceramic matrix
  • particle size
  • molecular weight
  • thin films
  • thin film

  • matrix composites
  • conventional methods
  • distri button
  • processing steps
  • drying stresses

  • grain size
  • phase diagram
  • molecular architecture
  • traditional powder
  • powder metallurgy

  • pore size
  • oxide polymer
  • uniform growth
  • dccas minimize
  • differential drying

  • solvent substituted
  • microstructure occurs
  • gel process


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