Content
    Introduction
    Ceramic Matrix Nanocomposites
     • Type of CMN
     • Processing
    Metal Matrix Nanocomposites
     • Type of MMN
     • Processing
       Introduction of Nanocomposites
     Nanocomposites- solid structures with 
     nanometer-scale dimensional repeat 
     distances between the different phases that 
     constitute the structure
     Typically consist of:
      • Inorganic(host) solid containing an organic component 
       or vice versa
      • OR consist of 2 or more inorganic/organic phases in 
       some combinatorial form. Constraint- at least one of 
       the phases or features be in nano size
      • Extreme example: can be porous media, colloids, gels 
       and copolymers
      Introduction of Nanocomposites
    Core concept:
     • Combination of nano-dimensional phases with 
      distinct differences in structure, chemistry and 
      properties.
    Nanocomposites- can demonstrate 
     different mechanical, electrical, optical, 
     electrochemical, catalytic, and structural 
     properties than individual component
    Multifunctional behavior often more than 
     the sum of individual components.
            Why Nanocomposites?
     Efforts to develop high-performance ceramics 
     for engineering applications:
      • Gas turbines
      • Aerospace materials
      • Automobiles and etc.
     Conventional processed ceramics pose many 
     unsolved problems:
      • Relatively low fracture toughness & strength
      • Degradation mechanical properties at high T
      • Poor resistance to creep, fatigue and thermal shock
     Attempts to solve  incorporating second 
     phases
                 Second phases
    Either:
    • Particulates
    • Platelets
    • Whiskers
    • Fibers
    Disappointment in the use of micron-size 
    range fillers
    To solve the problem  nano-size fillers
    • Passive control of microstructures by 
     incorporating nanometer-size second-phase 
     dispersions into ceramic matrices.