Metallographic Determination for Porosity of Zirconia Ceramic Knives

摘要

Porosity has many effects on performance of ceramic knife including sharpness, durability, etc, the metallographic detection for porosity of food contact ceramic knife was established in this study. By compared the relation of sharpness, durability and porosity, Calculated quantitative metallographic of porosity, and established the standard atlas of metallographic sample, the porosity was detected. The results showed that not only the <0.5% porosity could be detected, and the opening, the closing porosity would be detected quickly and accurately at the same time. It could be used in optimizing process and monitoring quality and safety of food contact ceramic knife.