Compression of microparticles by cylindrical flat punch using a nanoindenter
Microparticles and microspheres are used in making medicines, 3D printing, thermal spraying, electrical industry, and drug delivery. The success of these processes often relies on the mechanical properties of the microparticles. In this application we show how to measure the compressive properties of microparticles using instrumented indentation.
Microparticles, particularly microspheres, have diverse applications in fields such as medicine, additive manufacturing, thermal spraying, powder paints, Li-ion batteries, perfumes, and drug delivery. The mechanical properties of these particles are critical for determining the quality and structure of the final products. For example, appropriate hardness and compressive properties of metallic or ceramic particles are essential in thermal spraying and additive manufacturing to achieve low porosity and optimal microstructure. Similarly, in drug delivery systems or perfume microcapsules, mechanical properties influence the release mechanism of the encapsulated contents.
Accurately assessing the mechanical properties of microparticles is crucial for successful product development but can be challenging. One of the most effective methods for this is compression testing using a nanoindenter with a cylindrical flat punch. This technique offers high-resolution measurements of force and displacement, as well as thermal stability, making it suitable for analyzing microparticles ranging from a few micrometers to several hundred micrometers in diameter. For applications requiring higher load ranges, a microindenter can be used.
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