Lämpöshokkimak

Lämpöshokkimak refers to a phenomenon observed in certain materials, particularly ceramics and glass, where rapid changes in temperature can lead to stress and potential fracture. This stress arises from the differential expansion and contraction of the material's surfaces and interior. When a hot object is rapidly cooled, its surface contracts more quickly than its interior, creating tensile stress on the surface. Conversely, rapid heating causes the surface to expand faster, inducing compressive stress on the surface and tensile stress in the interior.

The susceptibility of a material to thermal shock is influenced by several factors, including its coefficient of thermal expansion, thermal conductivity, tensile strength, and fracture toughness. Materials with a high coefficient of thermal expansion are more prone to thermal shock because they expand or contract significantly with temperature changes. Low thermal conductivity can exacerbate thermal shock by creating larger temperature gradients within the material. High tensile strength and fracture toughness can help a material resist the stresses induced by thermal shock.

Examples of materials susceptible to thermal shock include cookware, glassware, and kiln furniture. The design of these items often incorporates features to mitigate thermal shock, such as rounded edges, uniform thickness, and the use of materials with lower coefficients of thermal expansion. Understanding lämpöshokkimak is crucial in engineering and manufacturing to ensure the durability and longevity of products exposed to thermal cycling.