Crack-Healing + Proof Test: A New Methodology to Guarantee the Structual Integrity of Ceramics Component

摘要

Structural ceramics are brittle and sensitive to flaws. To overcome this problem, it is desirable to use the crack-healing ability of ceramics. At the moment, there is no technique to heal embedded flaws. Then, a new technique to guarantee the reliability of ceramics components is demanded. Thus, we proposed a new technique [Crack-healing + Proof test]. Using a process zone size failure criterion, an equation for the temperature-dependence of proof stress(σ_(P~T)) is derived. The accuracy of the equation has been verified for monotonic loading tests up to 1300°C.