Hardness evaluates a material's potential to resist mechanical don and abrasion. Alumina ceramics surpass steel and tungsten carbide tools in hardness. Over the Rockwell hardness scale, alumina ceramics vary from HRA80-90, positioning them just under diamonds and over chrome steel. Ultrasonic Machining (USM): This method consists of degrading the alumina https://leonardi543xnc0.dekaronwiki.com/user