Answer to What is This on the Cover of American Laboratory September

The image on the cover of American Laboratory September is of open cell metallic foam. It was captured with a JEOL tungsten SEM. Original magnification 100×.

Image courtesy of JEOL USA, Inc. (Peabody, MA, U.S.A.). Metallic foam is a cellular structure made up of a solid metal that contains a large volume fraction of gas-filled pores. The distinguishing property of these foams is their very high porosity.

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