Application of laser particle size analyzer in IN718

IN718 is a precipitation hardening nickel-based superalloy with excellent corrosion resistance, high strength and good thermal stability. IN718 particle size has a significant impact on its application, as follows:

Powder metallurgy and additive manufacturingSintering performance: IN718 powder with smaller particle size has a larger specific surface area, which makes the atomic diffusion distance of the powder shorter during the sintering process, and can reach the formation and growth stage of the sintering neck faster, thereby promoting sintering densification. However, if the particle size is too small and the surface energy of the powder is too high, it is easy to cause the powder to agglomerate during storage and transportation, forming larger agglomerates. It is difficult for these agglomerates to be fully densified during sintering. Instead, more pores and defects will be introduced, reducing the performance of the material. In contrast, powders with larger particle sizes require higher temperatures and longer times to achieve densification when sintering, but powders with large particle sizes are not easy to agglomerate, which is beneficial to obtaining a uniform microstructure to a certain extent.

Coating applicationCoating Thickness and Uniformity: When preparing coatings using IN718 powder, the powder particle size has a significant impact on coating thickness and uniformity. During the spraying process, the larger particle size IN718 powder has a larger mass and larger inertia, so it is relatively less affected by airflow interference during the flight, and it is easier to reach the substrate surface along the predetermined trajectory. This makes it easier for large particle size powders to form thicker coatings when sprayed. However, during the spraying process of large particle size powder, the accumulation between particles is relatively loose, which easily forms large pores and cavities inside the coating, thereby affecting the density and uniformity of the coating. In contrast, IN718 powder with a smaller particle size has a smaller mass and smaller inertia during spraying, and is more susceptible to scattering due to the influence of airflow during flight, resulting in a more uniform distribution of the powder on the surface of the substrate. At the same time, small particle size powders can better fill the gaps between particles when stacked, thereby forming a denser and more uniform coating. However, during the spraying process, small-grained powder has a large specific surface area and a fast heat exchange rate with the surrounding environment. It is easy to cool and solidify during the flight, resulting in the powder being unable to fully melt and spread when it reaches the surface of the substrate. Affects the quality and performance of the coating.

In summary, the particle size of IN718 has an important impact on its performance in different application fields. Therefore, in actual applications, materials with appropriate particle sizes need to be selected according to specific needs. This time Winner2018 is recommended to measure the IN718 particle size distribution for customers.

Measuring instrument information is as follows:

The video of measuring nanoparticles is as follows：