Abrasive particles having complex shapes and methods of forming same
An abrasive grain is disclosed and may include a body. The body may define a length (l), a height (h), and a width (w). In a particular aspect, the length is greater than or equal to the height and the height is greater than or equal to the width. Further, in a particular aspect, the body may include a primary aspect ratio defined by the ratio of length:height of at least about 2:1. The body may also include an upright orientation probability of at least about 50%.
1. A shaped abrasive particle comprising:
a generally prismatic body having a length, width, and thickness;
wherein the length is greater than the width and the length is greater than the thickness;
wherein the generally prismatic body with a first end face and a second end face have a polygonal shape; and
wherein the generally prismatic body comprises an odd number of major surfaces.
2. The shaped abrasive particle of claim 1 , wherein the body comprises a twist along a longitudinal axis defining the length of the body.
3. The shaped abrasive particle of claim 2 , wherein the twist angle is at least about 2 degrees.
4. The shaped abrasive particle of claim 1 , wherein the shaped abrasive particle is part of a fixed abrasive article.
5. The shaped abrasive particle of claim 1 , wherein the body comprises a twist along a lateral axis defining the width of the body.
6. The shaped abrasive particle of claim 5 , wherein the twist along the lateral axis defines a lateral twist angle between two ends of the body of at least about 1 degree.
7. The shaped abrasive particle of claim 1 , wherein the polygonal shape is selected from the group consisting of a triangle, a rectangle, a quadrilateral, a pentagon, a hexagon, a heptagon, an octagon, a nonagon, a decagon, and a combination thereof.
8. The shaped abrasive particle of claim 1 , wherein the body comprises a polycrystalline material.
9. The shaped abrasive particle of claim 1 , wherein the body comprises a twist along a vertical axis defining the height of the body.
10. The shaped abrasive particle of claim 9 , wherein the twist along the vertical axis defines a vertical twist angle between two ends of the body of at least about 1 degree.
11. The shaped abrasive particle of claim 1 , wherein the first end face comprises a different polygonal shape compared to the second end face.
12. The shaped abrasive particle of claim 1 , wherein the body consists essentially of alumina.
13. A shaped abrasive particle comprising:
a generally prismatic body having a length, width, and thickness;
wherein the length is greater than the width and the length is greater than the thickness;
wherein the generally prismatic body with a first end face and a second end face have a polygonal shape; and
wherein the generally prismatic body comprises a center of mass and a geometric midpoint and wherein the center of mass is displaced from the geometric midpoint by a distance selected from the group consisting of: (Dh) of at least about 0.05(h) along a vertical axis of the body defining the height, (Dw) of at least about 0.05(w) along a lateral axis of the body defining the width, and (Dl) of at least about 0.05(l) along a longitudinal axis of the body defining the length.
14. The shaped abrasive particle of claim 13 , wherein the center of mass is closer to a base surface of the body than the geometric midpoint.
15. The shaped abrasive particle of claim 13 , wherein the first end face and the second end face have a polygonal shape.
16. The shaped abrasive particle of claim 13 , wherein the body is overlying a backing and comprises an upright orientation probability of at least about 50%.
17. A shaped abrasive particle comprising:
a generally prismatic body having a length, width, and thickness;
wherein the length is greater than the width and the length is greater than the thickness;
wherein the generally prismatic body with a first end face and a second end face have a polygonal shape; and
wherein the body consists essentially of alumina.
18. The shaped abrasive particle of claim 17 , wherein the body comprises a first side face extending between the first end face and the second end face and a second side face extending between the first end face and the second end face adjacent to the first side face.
19. The shaped abrasive particle of claim 18 , wherein the body comprises a first V-shaped edge channel face between the first side face and the second side face.
20. The shaped abrasive particle of claim 17 , where the shaped abrasive particle is part of a fixed abrasive article.