Sealing member and method for manufacturing same

A method for manufacturing a sealing member used in a sealing part in which friction occurs, the method comprising the steps of:

• (a) placing a plurality of cylindrical or polygonal columnar graphites in a mold to be spaced apart from each other and in parallel;
• (b) filling a space between the plurality of cylindrical or polygonal columnar graphites with a composition including silicon carbide and a binder;
• (c) pressing the mold to manufacture a molded element;
• (d) separating the molded element shaped with the plurality of cylindrical or polygonal columnar graphites and the composition including silicon carbide and a binder from the mold;
• (e) machining the molded element into a desired shape;
• and
• (f) sintering the machined molded element,
• wherein the plurality of cylindrical or polygonal columnar graphites are disposed in a direction perpendicular to a wear surface, and a substrate surface including silicon carbide exposed on the wear surface and cross-sections of the plurality of cylindrical or polygonal columnar graphites are machined to form a plane, and
• wherein in step (c), the pressing is applied at a pressure of 200 to 1200 kg/cm2, and in step (f), the sintering is performed at a temperature of 1200° C. to 2200° C.