Triboluminescent materials can be used to detect structural damage. If triboluminescent materials are embedded in a composite, they will generate light if the composite begins to experience structural failure. A sensor will detect the light and report that failure has occurred. This monitoring can detect failure in its early stages because many composite materials begin…

The phenomenon of triboluminescence is poorly understood. Some researchers believe that scratching or hitting materials together provides an input of energy that excites electrons within the materials. When the electrons fall from their excited state, a flash of light is produced [2]. Others believe that triboluminescence is similar to lightning and caused by an electrical current generated…

Triboluminescence is present in quartz; however, the strength of the phenomenon varies from specimen to specimen. Triboluminescence is well known in sphalerite, fluorite, calcite, muscovite, and many feldspar minerals. Some specimens of common opal produce a bright orange flash. Test a few specimens yourself. Don’t forget to wear safety glasses, and be aware that this test will scratch your specimens. You will probably…

Triboluminescence is a flash of light produced when a material is subjected to friction, impact or breakage. The phenomenon is also known as fractoluminescence and mechanoluminescence. Triboluminescence is common in minerals. About 50% of crystalline materials are thought to exhibit the property. It is also observed in many noncrystalline materials [1]. How to Demonstrate Triboluminescence ****…