Bonded abrasive articles
AssigneesSaint-Gobain Abrasives, Inc., Saint-Gobain Abrasifs
InventorsNilanjan Sarangi, Guangyong Lin, Sandhya Jayaraman Rukmani, Stephen E. Fox, Daming Zhang
Life of this patent
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Abstract
An abrasive article includes a body having a bond material extending throughout the body and abrasive particles contained in the bond material. The bond material can include aluminum oxide (Al2O3) and lithium oxide (Li2O). In an embodiment, the bond material can include a ratio (Al2O3/Li2O) of a content of aluminum oxide (Al2O3) relative to a content of lithium oxide (Li2O), based on weight percent, of greater than 11.5 and at most 20. In another embodiment, the abrasive article can have a versatility factor of greater than 1.90.
Claims19
An abrasive article comprising:
- a body including:
- a bond material extending throughout the body, wherein the bond material comprises for a total weight of the bond material:
- at least 26.5 wt % and at most 40 wt % of aluminum oxide (Al2O3);
- at least 1.1 wt % and less than 2 wt % of lithium oxide (Li2O);
- at least 1.2 wt % and not greater than 5.5 wt % of potassium oxide (K2O);
- at least 7 wt % and at most 9 wt % of sodium oxide (Na2O);
- at most 2 wt % of any one of the components selected from the group consisting of manganese dioxide (MnO2), magnesium oxide (MgO), calcium oxide (CaO), iron oxide (Fe2O3), phosphorous oxide (P2O5), barium oxide (BaO), zinc oxide (ZnO), zirconium oxide (ZrO2), and titanium dioxide (TiO2);
- at least 9 wt % and at most 15 wt % of boron oxide (B2O3);
- and
- at least 35 wt % and at most 46 wt % of silicon dioxide (SiO2);
- and
- abrasive particles contained within the bond material,
- wherein the body comprises at least 3 vol % and not greater than 20 vol % of the bond material, at least 33 vol % and at most 55 vol % of a porosity for the total volume of the body;
- and at least 36 vol % and at most 56 vol % of the abrasive particles for a total volume of the body;
- and
- wherein:
- when the body comprises at least 3 vol % and less than 9 vol % of the bond material, the body comprises at least 110 bond bridges;
- when the body comprises at least 9 vol % and less than 14 vol % of the bond material, the body comprises at least 140 bond bridges;
- or
- when the body comprises at least 14 vol % of the bond material, the body comprises at least 135 bond bridges.
An abrasive article comprising:
- a body including:
- a bond material extending throughout the body, wherein the bond material comprises:
- lithium oxide (Li2O) of at least 1.2 wt % and at most 1.7 wt % for a total weight of the bond material;
- aluminum oxide (Al2O3) and lithium oxide, wherein a ratio (Al2O3/Li2O), based on weight percent, is at least 15.1;
- at least 26.5 wt % and at most 40 wt % of aluminum oxide (Al2O3) for a total weight of the bond material;
- at least 9 wt % and at most 16 wt % of boron oxide (B2O3) for the total weight of the bond material;
- at least 35 wt % and at most 46 wt % of silicon dioxide (SiO2) for the total weight of the bond material;
- and
- at least 2 wt % and at most 3.5 wt % of K2O for the total weight of the bond material;
- and
- at least 7 wt % and at most 9 wt % of sodium oxide (Na2O);
- at most 2 wt % for a total weight of the bond material of any one of the components selected from the group consisting of manganese dioxide (MnO2), magnesium oxide (MgO), calcium oxide (CaO), iron oxide (Fe2O3), phosphorous oxide (P2O5), barium oxide (BaO), zinc oxide (ZnO), zirconium oxide (ZrO2), and titanium dioxide (TiO2);
- and
- abrasive particles contained within the bond material,
- wherein:
- when the body comprises at least 3 vol % and less than 9 vol % of the bond material, the body comprises at least 110 bond bridges;
- when the body comprises at least 9 vol % and less than 14 vol % of the bond material, the body comprises at least 140 bond bridges;
- or
- when the body comprises at least 14 vol % of the bond material, the body comprises at least 135 bond bridges.
Dependencies are inferred from the claim text.