Lab final exam Arrange one hour during your normal lab time with you lab partners Special times can be arranged for those with conflicts If Matt can’t do the final in 30 minutes, it will be shortened or the time will be extended! Final details to be announced Friday

Lab final exam Au/C Grade = 30/(500kX-your highest magnification image that instructor deems to be “sharp”) Polystyrene on glass 30/(50kX-your highest magnification image that instructor deems to be “sharp”) You may not coat. Quantitative analysis of microscope slide Grade = 40*(1- manufacturer specs/your values). You may coat in advance of class. Half credit for qualitative analysis. 55 minute time limit. Is this unrealistic?

Lab this week and last lab report Your own samples 1 page summary lab report + images. Due next week at the lab final

Lab this week Who wants to do EBSD? –See Eric to set up a time Who wants to do more ESEM? –ESEM on your samples Who wants to do XRF? –XRF on your samples Option 4: if you don’t have any samples worthy of the ESEM or other techniques –Is anybody in this category? –We’ll think of something

Projects Relevant to those signed up for four credits Project reports due end of next week Earlier would be appreciated

Electron BackScatter Diffraction How does it work: –Electrons have an associated wavelength –Crystalline materials have a regular periodic structure –Crystalline materials have a regular periodic distribution of charges –Electrons scatter off charges –Scattering by a regular periodic array leads to interference patterns –Interference patterns are characteristic of what scattered them

Applications Metallurgy –Grain size –Grain orientation –Misorientation at grain boundaries Microelectronics (application of metallurgy) –Microstructure of metallization –Recrystallization –Lead-free solders

Applications Ceramics –Alumina, Zirconia…any crystalline material –Relate mechanical properties to structure –Relate structure to processing Geology –Deformation structures –Relation among phases in rocks –Grain boundaries –Orientations at grain boundaries