Polycrystalline diamond compact cutting elements, methods of forming same and earth-boring tools

A method of forming a cutting element, the method comprising:

• leaching at least a portion of a diamond table;
• and
• subsequent to leaching the at least a portion of the diamond table, polishing an interface between a cutting surface of the diamond table and an outer side surface of the diamond table to form a chamfer on the diamond table, polishing the interface between the cutting surface of the diamond table and the outer side surface of the diamond table comprises:
• polishing the diamond table via a polishing wheel until at least a portion of the diamond table graphitizes;
• disengaging the diamond table from the polishing wheel;
• and
• while the diamond table is disengaged from the polishing wheel, subjecting the diamond table to airflow to remove graphitized portions of the diamond table.

A method of forming an earth-boring tool, the method comprising:

• forming a cutting element comprising:
• leaching at least a portion of a diamond table of the cutting element;
• and
• subsequent to leaching the diamond table of the cutting element, forming a chamfer on the diamond table of the cutting element at an interface between a cutting surface of the diamond table and an outer side surface of the diamond table by:
• polishing the diamond table of the cutting element until at least a portion of the diamond table graphitizes;
• and
• removing graphite from the diamond table by subjecting at least a portion of the diamond table to airflow;
• and
• securing the cutting element to a body of the earth-boring tool.

A method of forming an earth-boring tool, the method comprising:

• forming a cutting element comprising:
• leaching at least a portion of a diamond table;
• and
• subsequent to leaching the at least a portion of the diamond table, polishing an interface between a cutting surface of the diamond table and an outer side surface of the diamond table to form a chamfer on the diamond table, polishing the interface between the cutting surface of the diamond table and the outer side surface of the diamond table comprises:
• polishing the diamond table via a polishing wheel until at least a portion of the diamond table graphitizes;
• disengaging the diamond table from the polishing wheel;
• and
• while the diamond table is disengaged from the polishing wheel, subjecting the diamond table to airflow to remove graphitized portions of the diamond table;
• and
• securing the cutting element to a body of the earth-boring tool.