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What is differential of Alloy and MMC?

  1. Dec 13, 2014 #1
    We can find differential of alloy and composite. MMC is came from 2 differential of metal, one from it aren't melting same as producing alloy. but there are might produce new reaction. ex: C with Fe, the name is carbon steel. the nano-composite just too, but the particle aren't big, and the size is nano. the differential of it came from the coefficient electric, the composite aren't count without experiment. but what is differential of alloy, MMC and metal nano-composite, when it see from structure composition and phase?
     
  2. jcsd
  3. Dec 14, 2014 #2

    Danger

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    Welcome, Mufidun. I can tell that you're trying very hard to express yourself in English, which obviously isn't your first language. Unfortunately, the sad fact is that I simply cannot understand what you are trying to say. Sorry. Can you perhaps find another way to express it?
     
  4. Dec 14, 2014 #3

    Astronuc

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    Is one asking about a specific alloy/composite system, of which there are many?

    What type of nano-composite? Dispersed oxide? or other?

    See some basic considerations here - http://www.wiley-vch.de/books/sample/3527313605_c01.pdf

    Weight is often a consideration, as is strength. Then service environment, in which temperature and corrosive media must be considered.

    Temperature is important depending on the thermodynamic/chemical stability of the reinforcement (e.g., ceramic or carbon) in the metal matrix.
    http://en.wikipedia.org/wiki/Metal_matrix_composite
     
  5. Dec 14, 2014 #4
    I'm sorry, i don't have good English vocabulary. i must study again. thanks for your attention.
     
  6. Dec 14, 2014 #5

    Danger

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    No need to apologize; you're doing quite well. I'm totally incapable of learning any other language. English is one of the more difficult ones, and the only reason that I learned it is that it's what I was born into.
     
  7. Dec 14, 2014 #6
    I'm trying to explain. :)
    MMC and alloy when seen from the micro structure is almost as if the MMC has a small particle size, and when compared with nano-composites are made from metal-metal (small size as well), what distinguishes the alloy.

    because I want to clarify the explanation of my lecture about the differences alloys and composites.
     
  8. Dec 14, 2014 #7

    Danger

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    Okay, now the problem is that I don't know enough about the subject. I thought that "nano-composites" would be the same as regular MMC's, with reinforcement material introduced to a matrix (the way glass fibres reinforce the resin in fibreglass). I'm afraid I'm out of my depth here.
     
  9. Dec 14, 2014 #8

    Astronuc

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    On the nano-level, it would be the crystal structure and composition or stoichiometry. There would be a base metal alloy and a separate phase with a different crystal structure and composition, which could labeled a second-phase particle. Clearly one can distinguish a ceramic such as Al2O3 from Al-Mg alloy. In some Ni-based alloys, Ti and Al form second phase particles, Ni3Ti or Ni3Al, in the Ni alloy.

    For example, http://www.google.com/patents/US5720829

    There are many examples of dispersed second phase particles added for strengthening alloys, e.g., ODS (oxide dispersion strengthened) alloys

    http://www.tms.org/superalloys/10.7449/1988/Superalloys_1988_595_604.pdf
     
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