Attack inserts with differing surface finishes, assemblies, systems including same, and related methods
A superabrasive element includes a substrate and a superabrasive table bonded to the substrate, the superabrasive table including a polished surface having a polished finish, the polished surface extending over at least a central, apical region of the superabrasive table, and an unpolished surface including an unpolished finish, the unpolished surface surrounding a majority of the polished surface. A method of manufacturing a superabrasive element includes providing a superabrasive element having a substrate and a superabrasive table bonded to the substrate and polishing at least a central, apical region of the superabrasive table to form a polished surface, without polishing an unpolished surface of the superabrasive table, the unpolished surface surrounding a majority of the polished surface.
1. A superabrasive element comprising:
a substrate; and
a superabrasive table bonded to the substrate, the superabrasive table comprising:
a polished surface having a polished finish, the polished surface extending over at least a central, apical region of the superabrasive table; and
an unpolished surface having an unpolished finish, the unpolished surface surrounding a majority of the polished surface, wherein at least a portion of the unpolished surface of the superabrasive table is substantially arcuate and convex.
2. The superabrasive element according to claim 1 , wherein at least a portion of the unpolished surface of the superabrasive table is substantially conical.
3. The superabrasive element according to claim 1 , wherein the central, apical region is domed.
4. The superabrasive element according to claim 1 , wherein the central, apical region is at least partially leached.
5. The superabrasive element according to claim 1 , wherein the central, apical region of the superabrasive table is substantially arcuate.
6. A method of manufacturing a superabrasive element, the method comprising:
providing a superabrasive element comprising:
a substrate; and
a superabrasive table bonded to the substrate;
polishing at least a central, apical region of the superabrasive table to form a polished surface, without polishing an unpolished surface of the superabrasive table, the unpolished surface surrounding a majority of the polished surface, wherein at least a portion of the unpolished surface of the superabrasive table is substantially arcuate and convex.
7. The method of manufacturing a superabrasive element according to claim 6 , wherein at least a portion of the polished surface of the superabrasive table is substantially arcuate.
8. The method of manufacturing a superabrasive element according to claim 6 , wherein at least a portion of the unpolished surface of the superabrasive table is substantially conical.
9. The method of manufacturing a superabrasive element according to claim 6 , wherein at least a portion of the unpolished surface of the superabrasive table is non-planar.
10. The method of manufacturing a superabrasive element according to claim 6 , wherein polishing at least the central, apical region comprises grinding, lapping, chemical polishing, laser polishing, ion beam polishing, or combinations thereof.
11. The method of manufacturing a superabrasive element according to claim 10 , wherein polishing at least the central, apical region comprises grinding or lapping without coolant.
12. The method of manufacturing a superabrasive element according to claim 6 , further comprising leaching at least the central, apical region.
13. The method of manufacturing a superabrasive element according to claim 6 , wherein providing the superabrasive element comprises providing the superabrasive table with a domed, central, apical region.
14. The method of manufacturing a superabrasive element according to claim 13 , wherein providing the superabrasive element comprises providing the superabrasive table with a conical surface surrounding the domed, central, apical region.