Question

Identify the type of defect in brass alloy.

• A. Interstitial impurity defect
• B. Schottky defect
• C. Substitutional impurity defect
• D. Metal deficiency defect

Hint:

Brass (Cu + Zn) and Bronze (Cu + Sn) are classic examples of substitutional alloys.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Alloys are solid solutions where atoms of one metal are mixed with another. If the atoms have similar sizes, they substitute each other in the crystal lattice.
Step 2: Key Formula or Approach:
Identify the components of brass.
Step 3: Detailed Explanation:
Brass is an alloy consisting primarily of Copper (Cu) and Zinc (Zn). Cu and Zn atoms have very similar atomic radii. In the brass crystal structure, some Zinc atoms occupy the lattice sites normally held by Copper atoms. This replacement of one atom by another of similar size is a substitutional impurity defect.
Step 4: Final Answer:
Brass has a substitutional impurity defect.