Question

Consider the following statements for a composite material:

1. It is considered to be any multiple materials that exhibit a significant proportion of the properties of both constituents.

2. Constituent phases in a composite must be chemically similar.

3. A matrix combined with a reinforcing material is used in the composite.

4. Thermosetting epoxy resin is used as the matrix for some kinds of composition.

Which of these statements are correct?
1. 1, 2 and 3
2. 1, 2 and 4
3. 1, 3 and 4
4. 2, 3 and 4
5.

Answer 1

Correct Answer - Option 3 : 1, 3 and 4

Explanation:

• A composite material is a combination of multiphase materials with different physical and chemical properties that exhibits a significant proportion of the properties of both constituent phase such that a better combination of properties is optimized for a certain application, like higher strength to weight ratio, lighter or resistant to electricity. 
• The constituent phase must be chemically dissimilar so statement 2 is incorrect.
• The constituent phase must be separated by a distinct interface.
• A matrix combined with a reinforcing material is used in the composite e.g. The glass fiber reinforced composites are composed of fibers (reinforcing material) embedded in glass matrix material so statement 3 is correct
• The thermosetting epoxy resin can be used as a matrix for some kinds of composition.