|Sep9-10, 03:12 PM||#1|
So I'm doing research with MEMs so we're going to be making silicon wafers that will have little cantilever beams on them which will act as an accelerometer. I need to design it so the beams break at certain forces but to do that I need the yield strength of silicon (that is the correct property isn't it?) and I can't find it anywhere. I'm thinking maybe pure silicon is not the material thats used in MEMs so if someone could point me in the direction to where I could find those mechanical properties that'd be awesome! Thanks
|Sep9-10, 06:29 PM||#2|
Here's a good source:
|Sep11-10, 08:18 PM||#3|
Silicon doesn't yield; it's brittle, so it fractures. And just like any brittle material, its tensile strength is very sensitive to surface properties and defects. That's why you'll probably find a large range of reported values for tensile strength, and why you'll probably be disappointed if you expect your structures to break reliably at a certain load every time.
You might find Cook's "Strength and sharp contact fracture of silicon," J Mater Sci 41 (2006) to be useful.
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