Correct option is D
Aluminium oxide (Al₂O₃) is widely used as an
abrasive for
lapping soft ferrous and non-ferrous metals due to its
high hardness, durability, and fine cutting ability.
Reasons:
·
Effective for Soft Ferrous & Non-Ferrous Metals:
· Provides a smooth and precise finish without excessive material removal.
·
High Hardness:
· Aluminium oxide is
harder than most soft metals, making it ideal for controlled lapping.
·
Excellent Wear Resistance:
· Ensures long-lasting abrasiveness during the lapping process.
·
Fine & Consistent Finish:
· Produces a smooth surface with minimal scratches, improving dimensional accuracy.
