The particle shape, size, composition, and surface and internal structure of powders are their key physical characteristics, which directly influence their flow, compaction, sintering, and other properties. Scanning electron microscopy (SEM), with its high-resolution imaging capability, can clearly reveal the surface morphology and microstructure of powder particles, analyse particle size distribution, shape regularity, and surface defects. Combined with energy dispersive spectroscopy (EDS), it can also perform qualitative and quantitative analysis of the chemical composition of particles, revealing the distribution of different elements within the particles. Additionally, techniques such as transmission electron microscopy (TEM) can further examine the internal crystal structure and defect types of powder particles, providing support for optimising powder preparation processes and enhancing material performance.
