Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Manufacturing of Hybrid Metal Matrix Composites used $Al_2O_3$ Short Fiber and $Al_2O_3$-TiC Composite Powder Synthesized by SHS Process

SHS법에 의해 제조된 $Al_2O_3$-TiC복합분말과 $Al_2O_3$단섬유를 강화재로 사용한 하이브리드 금속기 복합재료의 제조

  • Kim, Dong-Hyeon (Department of Metallurgical Engineering and Rapidly Solidified Materials Research Center, Chungnam National University) ;
  • Maeng, Deok-Yeong (Department of Metallurgical Engineering and Rapidly Solidified Materials Research Center, Chungnam National University) ;
  • Lee, Jong-Hyeon (Department of Metallurgical Engineering and Rapidly Solidified Materials Research Center, Chungnam National University) ;
  • Won, Chang-Whan (Department of Metallurgical Engineering and Rapidly Solidified Materials Research Center, Chungnam National University)
  • 김동현 (충남대학교 금속공학과 및 급속응고신소재연구소) ;
  • 맹덕영 (충남대학교 금속공학과 및 급속응고신소재연구소) ;
  • 이종현 (충남대학교 금속공학과 및 급속응고신소재연구소) ;
  • 원창환 (충남대학교 금속공학과 및 급속응고신소재연구소)
  • Published : 1999.03.01
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Abstract

Metal matrix composites have been extensively studied because of their excellent characteristics for structural application. $Al_2O_3$ and SiC have been used as a common reinforcement owing to their good mechanical properties. However the manufacturing cost of these ceramic reinforcement is expensive, so the use of the composites has been restricted to special purposes. In this study, we tested the application possibility as a reinforcement of $Al_2O_3$-TiC powder synthesized by SHS(Self-propagating High-temperature Synthesis) process to Al alloy matrix composite. Also, $Al_2O_3$ short fibers were added with the synthesized powders in order to apply to the Al matrix hybrid composites. Squeeze infiltration casting process was used to make the composite with 25vol% of reinforcement. Microstructure and crystal structure were examined by SEM, OM and XRD, also the mechanical properties were studied by the compressive test and wear test.

금속기지 복합물은 구조용 재료로서 매우 우수한 성질을 지니고 있어 광범위하게 연구되어져 왔다. $Al_2O_3$와 SiC는 그들의 우수한 기계적 특성 때문에 일반적인 보강재로서 사용되어져 왔다. 그러나 이들 세라믹 보강재는 비싼 재조 비용 때문에 특별한 목적을 위해서만 한정되어 사용되어져 왔다. 본 연구에서는 우리는 Al 합금기지 복합물에서 SHS법에 의해 합성된 $Al_2O_3$-SiC 분말의 보강재로서의 응용 가능성을 살펴보았다. 또한 $Al_2O_3$단섬유를 Al기지 하이브리드 복합물에 적용하기 위하여 합성된 분말과 함께 첨가하였다. 25vol% 강화재의 복합물을 제조하기 위하여 용탕단조법을 사용하였다. 미세구조와 결정구조는 SEM, OM 그리고 XRD로 관찰하였고 압축시험과 마모시험으로 기계적인 성질들을 조사하였다.

Keywords

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