We talked about the porosity of zirconia in the last issue. Today we will talk aboutthe brittleness detection methods and standards of zirconia:
As we all know, zirconia ceramics have the advantages of high toughness, high flexural strength, high wear resistance, chemical corrosion resistance, high thermal expansion coefficient, high electrical properties, etc., and are used in structural ceramics, Functional ceramics and other fields, thus being widely used in all walks of life. In the production and application of ceramic products, the brittleness detection of ceramic products is very important. The failure of ceramic materials is basically caused by brittleness. The brittleness index should not only reflect the brittleness of ceramic products to ensure safe use, but also Reflects the scientific nature of the formulation of the manufacturing process of ceramic products (process assessment) and the compliance of the manufacturing process execution (process monitoring).
1) According to the Vickers hardness indentation morphology characteristics, the brittleness can be detected while testing the Vickers hardness of zirconia ceramics. The brittle indentation detection method is a convenient, fast, effective and low-cost detection method and can become a standard method.
2) Brittle indentation detection method There are two ways to evaluate the brittleness of zirconia ceramics. The first is the fixed Vickers hardness load size, and the brittleness is divided into three levels: effective indentation without cracks, effective indentation with cracks, and invalid indentation; the second is the brittle load size.
