| 액상 Ni/Si/Co 침투에 의한 반응결합 TiC 복합체의 치밀화 |
| 한인섭, 우상국, 배강, 홍기석1, 서두원, 정윤중 |
한국에너지기술연구소 에너지재료연구팀
1한국에너지기술연구소 에너지재료연구 |
| Densification of Reaction Bonded TiC Composite by Infiltration of Liquid Phase Ni/Si/Co |
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| ABSTRACT |
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The reaction-bonded TiC-Ni/Si/Co composites were prepared by the melt infiltration of Co, Si, and Ni me-tal into the TiC preforms. The miocrostructure reaction composition and mechanical properties were in-vestigated. In the case of the melt infiltrated with Co and Ni TiC grain shape was changed from angular to spherical shape with the average grain size of ∼5$mutextrm{m}$. In the case of the melt infiltrated with Co/Si or Ni/Si, Si was reacted with TiC particles and formed SiC particles. The bending strength of both specimens which have atomic ratio of 3 were 710 MPa and 515 MPa respectively. In the case of the melt infiltrated with Ni/Si/Co,. nonstoichiometric TiC was formed and its bending strength decreased to 420 MPa. |
| Key words:
Melt infiltration, TiC compostie, Reaction-bonded sintering, Co/Si/Ni melt |
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