| 摘要 |
PURPOSE:To obtain a guide plate having high dimensional accuracy and high service durability and abrasion resistance, by forming a guide plate from a composite body comprising a sintered porous body of silicon carbide with open pores filled with metallic silicon. CONSTITUTION:A silicon carbide powder, polyvinyl alcohol water solusion are mixed with each other in a ball mill, and the mixture is dried. An appropriate amount of the dried mixture is agglomerated, and the agglomerated material is molded by a metallic die. A multiplicity of such molded bodies are produced, are placed into graphite crucibles, and are fired in a Tamman furnace in an atmosphere consisting mainly of argon gas at 1atm. Open pores of sintered porous bodies of silicon carbide thus obtained are filled with metallic silicon to an extent of 95vol% to produce composite bodies, thereby obtaining guide plates. |
