What does "craze" refer to in the context of materials?

• A. A complete break of the material
• B. A smooth surface texture
• C. Spiderweb cracking of plastics under chemical stress
• D. A type of optical illusion

Answer: (C)

The term "craze" in the context of materials specifically refers to a phenomenon where spiderweb-like cracks form in the surface of certain plastics as a result of chemical stress or environmental factors. This type of cracking does not necessarily compromise the structural integrity of the material entirely but indicates a level of distress. It is often observed in thermoplastics and can be caused by exposure to solvents or other chemicals that disrupt the polymer structure, leading to the formation of these fine cracks.

Understanding crazing is important for materials science and engineering because it can affect the appearance, durability, and overall performance of a product. Identifying crazing allows professionals to assess potential failures in materials and helps in ensuring that the right materials are chosen for their intended applications, particularly in environments where they might be subjected to harsh chemicals or varying conditions.