Abrasive articles and methods for forming same

A method of making an abrasive article comprising:

• forming a mixture comprising abrasive particles having an average size of at least 200 microns, a bond precursor material, and a foaming agent, wherein the foaming agent is a reactant to a foaming process, wherein forming the mixture includes adding a surfactant to the mixture, wherein the surfactant is selected from the group consisting of sodium lauroyl sarcosinate, sodium laurel sulfate, sodium laurate, sodium stearate, sodium alkyl sulfate, sodium dodecyl sulfate, sorbitan, polyethylene glycol, polysorbate, glycerol monosterate, egg lecithin;
• and
• forming a bonded abrasive body from the mixture, wherein the bonded abrasive body comprises a bond material comprising an inorganic material and further comprising a permeability as defined by Darcy's number of at least 350.

A method of making an abrasive article comprising:

• forming a mixture comprising abrasive particles, a bond precursor material, a foaming agent, and a gelling agent, wherein the bond precursor material comprises an inorganic material, and wherein the gelling agent is selected from the group consisting of agar, agarose, xanthan gum, carboxy methyl cellulose, gellan gum, carrageenan gum, guar gum, tara gum, cellulose gum, locust bean gum, or any combination thereof;
• adding a foaming catalyst to the mixture, wherein the foaming catalyst interacts with the foaming agent to create bubbles in the mixture;
• forming a bonded abrasive body from the mixture, wherein the bonded abrasive body comprises a porosity within a range of at least 55 vol % to not greater than 90 vol % for a total volume of the bonded abrasive body, a permeability as defined by Darcy's number of at least 350, or a combination thereof.