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Chapter 16:
Controlled Grind
The strength of an amorphous glass, crystal, or ceramic is determined by its surface finish. Normal surface flaws generated during the manufacturing process reduce the tensile strength from values well in excess of 1,000,000 psi by up to 3 orders of magnitude, as we have seen. Since this reduction is a function of initial flaw depth, strength increase by reduction in flaw size (improved surface finish) is attainable. The strength, as we recall, is proportional to the square root of flaw depth.
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