테입 캐스팅 공정을 이용한 초경재료 박판재의 소결거동 (Sintering Behavior of Cemented Thin Plate using Tape Casting Process)

서지정보

· 발행기관 : 대한금속·재료학회
· 수록지 정보 : 대한금속·재료학회지 / 42권 / 12호 / 1039 ~ 1046페이지
· 저자명 : 심우영, 김창삼, 김영도, 이욱성

초록

Tape casting process was applied to the fabrication of cemented carbide thin plate with thickness below
1 mm, which is expected to reduce the production cost and to enable the mass production of thin plates. Using the
tape casting process, thin plates of cemented carbide were fabricated in the various forms such as monolithic and
laminated, perforated and non-perforated thin plate forms. The debinding and sintering behavior were investigated
to define the related problems and the solutions were suggested. Through sequential application of sheet forming
by tape casting, lamination, debinding and vacuum sintering, the flat cemented carbide thin plates of lateral
dimension, the sintered thickness and its deviation of 45~75 mm, minimum 500 μm and 50 μm, respectively, could
be fabricated. Cemented carbide thin plates of perforated forms as well as the laminated forms could also be
fabricated with a similar specification. Abnormal grain growth was observed in the microstructure, which was
attributed to the incorporation of the impurities during the tape casting process. It was found to be readily
preventable. Sintering behavior was investigated for the laminated composite thin plates of TiC-Ni/WC-Ni, in the
performance diversification perspectives. When the grain growth kinetics were different for the two layers, an
asymmetric capillary force was generated to induce a different shrinkages of the layers. This induced a severe
warping of the plates. When the grain growth kinetics of the two layers were made identical by addition of grain
growth inhibitor, the shrinkage difference was prevented, which enabled warp-free, dense laminated plate.

영어초록

Tape casting process was applied to the fabrication of cemented carbide thin plate with thickness below
1 mm, which is expected to reduce the production cost and to enable the mass production of thin plates. Using the
tape casting process, thin plates of cemented carbide were fabricated in the various forms such as monolithic and
laminated, perforated and non-perforated thin plate forms. The debinding and sintering behavior were investigated
to define the related problems and the solutions were suggested. Through sequential application of sheet forming
by tape casting, lamination, debinding and vacuum sintering, the flat cemented carbide thin plates of lateral
dimension, the sintered thickness and its deviation of 45~75 mm, minimum 500 μm and 50 μm, respectively, could
be fabricated. Cemented carbide thin plates of perforated forms as well as the laminated forms could also be
fabricated with a similar specification. Abnormal grain growth was observed in the microstructure, which was
attributed to the incorporation of the impurities during the tape casting process. It was found to be readily
preventable. Sintering behavior was investigated for the laminated composite thin plates of TiC-Ni/WC-Ni, in the
performance diversification perspectives. When the grain growth kinetics were different for the two layers, an
asymmetric capillary force was generated to induce a different shrinkages of the layers. This induced a severe
warping of the plates. When the grain growth kinetics of the two layers were made identical by addition of grain
growth inhibitor, the shrinkage difference was prevented, which enabled warp-free, dense laminated plate.

참고자료

· 없음