Main identification methods of alumina wear-resistant ceramics

Alumina wear-resistant ceramics is one of the most widely used wear-resistant materials at present, and the wear-resistant ceramics market also has uneven quality. So, what are the main identification methods of alumina wear-resistant ceramics?

1. Look at the appearance The simple and intuitive way to judge the merits of wear-resistant ceramics is to judge from the appearance, excellent wear-resistant ceramics have smooth and delicate surfaces, no obvious defects, bright faces, crystal clear, and crystal luster. Poor quality wear resistance ceramic impurities, rough surface, dull color.

2. Perform metric testing. 1) Density of alumina: High density products mean high alumina content, but also means dense, so measuring density is also a simple and direct method. However, it is difficult to judge the quality of wear-resistant ceramics only by density index, and other means are needed. 2)Al₂O₃ content: In general, Al₂O₃ content has a great impact on the wear resistance of the product, the higher the Al2O3 content, the better the wear resistance.

3) Hardness of alumina: Hardness is an important indicator to measure the wear resistance of products, especially under special conditions, such as wear of high-speed particles and low erosion angles.   

4) Toughness of alumina: Toughness is an internal cause that is closely related to wear and tear. At present, it is generally believed that toughness has a great relationship with friction and wear of wear-resistant ceramics.         

At present, the main identification method of alumina wear resistant ceramics is the above two kinds, through the observation of the appearance and the combination of related indicators test, you can distinguish the quality of most wear-resistant ceramics, if you need to further understand the quality of wear-resistant ceramics, you can also observe the microstructure of wear-resistant ceramics to distinguish, but this method requires higher technical requirements, usually not commonly used.