| US 7,578,455 B2 | ||
| Method of grinding particulate material | ||
| Jin D. Kim, Dae-Jeon (Korea, Republic of); Wei Li, Troy, Mich. (US); and Se H. Oh, Troy, Mich. (US) | ||
| Assigned to General Motors Corporation, Detroit, Mich. (US) | ||
| Filed on Aug. 09, 2004, as Appl. No. 10/914,418. | ||
| Prior Publication US 2006/0027688 A1, Feb. 09, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B02C 17/00 (2006.01) | ||
| U.S. Cl. 241—5 [423/263; 423/579; 423/658.2; 423/279; 423/594.15; 423/594.16; 423/594.8; 423/594.14; 423/594.9; 423/594.7; 423/598; 241/15; 241/22; 241/30; 241/184] | 24 Claims |
| 1. A method of grinding a particulate material, comprising a step of grinding the particulate material with a mixture of at least two different sizes of high-density yttrium-stabilized zirconia balls to reduce the particle size of the particulate material, wherein the high-density yttrium-stabilized zirconia balls comprise at least two sizes of yttrium-stabilized zirconia balls having a ratio of diameters of from about 1.5:1 to about 5:1. |