New insights on ZERODUR® design presented in SPIE journal
New calculation procedure allows for reliable prediction of lifetime for given design stress
ZERODUR®, SCHOTT’s glass-ceramic with extremely low expansion, was once again the topic of an article published in SPIE's journal “Optical Engineering” in December 2012. It discussed new insights on the design of ZERODUR® structures with respect to elevated application stresses.
The observation of minimum breakage stress values for defined surface conditions combined with a well proven procedure for incorporating the stress corrosion effect allows for the lifetime of given design stresses to be calculated. The new approach does away with statistical uncertainties, doubtful extrapolations and overly conservative safety factors and thus leads to much higher admissible mechanical loads on ZERODUR®.
The article written by Dr. Peter Hartmann “ZERODUR®: deterministic approach for strength design” Opt. Eng. 51 (12), 124002 (December 18, 2012); doi: 10.1117/1.OE.51.12.124002 can be downloaded from the SPIE Digital Library.