Intermetallics and solid solution

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In summary, discrete intermediate compounds may be present in some systems instead of solid solutions, known as intermetallic compounds in metal-metal systems. In a binary isomorphous system like copper-nickel, 33 at% Ni may not necessarily mean Cu2Ni, as the crystal structure of the predominant element is unchanged in solid solutions. To distinguish intermetallic compounds from solid solutions with the same ratio, one can look at the presence of separate phases with different crystal lattices.
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For some systems, discrete intermediate compounds rather than solid solutions may be found on the phase diagram, and these compounds have distinct chemical formulas; for metal–metal systems, they are called intermetallic compounds. e.g. Mg2Pb has 33 at% Pb

For binary isomorphous system like copper-nickel, if we get 33 at% Ni, can we say it is Cu2Ni? How to distinguish intermetallics from other solid solution with same ratio?
 
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kelvin490 said:
For some systems, discrete intermediate compounds rather than solid solutions may be found on the phase diagram, and these compounds have distinct chemical formulas; for metal–metal systems, they are called intermetallic compounds. e.g. Mg2Pb has 33 at% Pb

For binary isomorphous system like copper-nickel, if we get 33 at% Ni, can we say it is Cu2Ni? How to distinguish intermetallics from other solid solution with same ratio?
Usually, if the crystal structure of the predominant element is unchanged, then it is considered a solid solution. Intermetallic compounds are often distinct or separate phases, with a different crystal lattice/structure, e.g., a bcc or fct phase in fcc or hcp lattice.

We may refer to second phase particles.
 
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1. What are intermetallics and solid solutions?

Intermetallics and solid solutions are types of metallic compounds that are made up of two or more elements. They have a specific crystal structure and are formed through the mixing of atoms in the solid state.

2. What is the difference between intermetallics and solid solutions?

The main difference between intermetallics and solid solutions lies in their composition and structure. Intermetallics have a fixed stoichiometry and a well-defined crystal structure, while solid solutions have a varying composition and a disordered crystal structure.

3. What are the properties of intermetallics and solid solutions?

Intermetallics and solid solutions have a range of properties depending on their composition and structure. Generally, they have high strength, good corrosion resistance, and high temperature stability. They may also exhibit unique magnetic, electrical, and optical properties.

4. What are some applications of intermetallics and solid solutions?

Intermetallics and solid solutions have a wide range of industrial applications. These include use in aircraft engines, turbine blades, electronic devices, and catalytic converters. They are also used in the production of high-temperature materials and in the automotive and aerospace industries.

5. How are intermetallics and solid solutions studied and analyzed?

Intermetallics and solid solutions are studied using various methods such as X-ray diffraction, electron microscopy, and thermal analysis. These techniques allow scientists to determine the crystal structure, composition, and properties of these compounds. Computational methods are also used to model and predict the behavior of intermetallics and solid solutions.

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