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EMT3701 Assessment 1 Answers Semester 1 2024
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Engineering Materials Technology IIAssessment 1 Answers
Semester 1 2024
0027 65 934 4052
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, 1.1 Composites are materials formed by combining two or more distict materials with
different properties to create a material with characteristics superior to the
individual components. They typically consists of a matrix (continuous phase) that
binds a reinforcing element, the reinforcement (dispersed phase).
Advantages of composites as compared to metals include the following;
1. Corrosion resistance: Composites are generally more resistant to
corrosion than metals, making them suitable for marine and harsh
environments.
2. High strength to weight ratio: Composites can be significantly lighter
than metals while offering similar or even better strength. This is crucial
in applications like aerospace and transportation.
3. Design Flexibility: Composites can be tailored for specific applications
by varying the matrix and reinforcement materials, their proportions and
fiber orientation.
4. Electrical and thermal insulation: Depending on the constituents,
composites can be good electrical or thermal insulators or even
conductors.
Limitations of composites compared to metals include the following;
1. Brittleness: Composites are often more brittle than metals, meaning
they can break more easily under sudden impact
2. Manufacturing complexity: Manufacturing processes for composites
can be more complex and expensive compared to traditional
metalworking techniques.
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