IF ALLOYS ARE HOMOGENEOUS MIXTURES,THEN WHY IS THERE CHANGE IN CHEMICAL PROPERTIES OF CONSTITUENT METALS AND ALLOYS

Asked by  | 30th Jan, 2012, 10:05: PM

Expert Answer:

The structure of an elemental metal includes tight "electron sea" bonds, which are discussed in the essay on Metals. These, combined with the metal's crystalline structure, create a situation in which internal bonding is very strong, but non-directional and forms the alloy. Sometimes alloys may exhibit different chemical properties as compared to their constituent metals like tensile strength, ductility, strength because alloys are made when the atoms of one metal replaces or occupies interstitial positions between the atoms of the other metal. This is sometimes a result of the sizes of the atoms in the alloy, because larger atoms exert a compressive force on neighboring atoms, and smaller atoms exert a (tensile) force on their neighbors, helping the alloy resist deformation and making it more stronger and ductile etc.

Answered by  | 31st Jan, 2012, 12:38: PM

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