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Effect of the glass-crystalline bond microstructure on the cutting ability of grinding wheels with Al2O3 abrasive grains

Herman Daniela, Nadolny Krzysztof, Socha Elżbieta, Ścibiorski Dawid

Journal of Mechanical and Energy Engineering

2019

Vol. 3, No 3

207--214

Standard ceramic abrasive tools are manufactured using glass bonds or mineral resources, in which the microstructure of the bonding bridges cannot be controlled. In this study, a new type of glass-crystalline bond was used to combine mixed abrasive grains from microcrystalline and monocrystalline corundum into an abrasive tool. The glass-crystalline bond has a fine crystalline structure (particle size of the crystalline phase: 1-1.5 µm) and perfectly moistens the abrasive grains. This fact and the generated crystalline phase with a high coefficient of brittle fracture resistance enable the production of tools with a higher porosity and selfsharpening ability in comparison to grinding wheels with the use of industrial bond, which results in high performance indices with a longer service life.