Material Science and Technology for kids

	Material Science and Technology for kids
	Definitions
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	A material that is a combination of two materials that have completely different characteristics. Each material makes up for the deficiency of the other. The first of the combination of materials that make up a composite is in the form of a fiber. The fiber is strong in tension, but too floppy to stand up to being compressed. The other material of the combination of materials that make up a composite is the matrix. The matrix holds the fibers together and gives the composite its shape. The matrix is weak and brittle, but has some flexibility. If a crack forms in the matrix, it will get diverted around the fibers. This reduces the stress that is causing the crack and the crack will stop. One example of a group of composites is the carbon fiber composites (CMC). CMC's are a popular material used in sports equipment such as tennis racquets, bicycle frames, and golf clubs. CMC's are made by placing a strong carbon fiber in a tough plastic matrix. This results in a very stiff, but extremely light weight material, which is needed for optimal equipment (stiff) and user (lightweight) performance of sports equipment.