Article
  • Influence of Oxidation Inhibitor on Carbon-Carbon Composites: 7. Studies on Work of Adhesion and Fracture Toughness of Carbon-Carbon Composites
  • Park SJ, Seo MK, Lee JR
  • 산화억제제를 첨가한 탄소/탄소 복합재료의 물성에 관한 연구 : 7. 탄소/탄소 복합재료의 부착력과 파괴인성
  • 박수진, 서민강, 이재락
Abstract
The objective of this study was to examine the effect of oxidation inhibitor contents on the work of adhesion, fracture toughness, and impact strength of the unidirectional carbon-carbon composites(C/C composites). The molybdenum disilicide(MoSi2) used as an oxidation inhibitor was impregnated with phenolic resins to improve the anti-oxidation properties of the composites in different concentrations of 4, 12 and 20 wt%. Based on Wilhelmy equation, the work of adhesion of CIC composites was calculated by contact angle methods. Fracture toughness and impact strength were measured by three-point bending test for the critical intensity factor(K(IC)) and Izod test method, respectively. As a result, the composites made with MoSi2 resulted in an increasing of both fracture toughness and impact strength. Especially, the composites made with 12wt% MoSi2 content showed the highest value of London dispersive component, W(A)(L), in work of adhesion, resulting from improving the interfacial adhesion force among fibers, filler, and matrix in this system.

본 연구에서는 일방향 탄소/탄소 복합재료에 산화억제제로 사용된 MoSi2의 첨가량에 따른 복합재료의 부착력, 파괴인성 그리고 충격강도와의 관계를 고찰하였다. 산화억제제로 사용한 이규화 몰리브덴 (MoSi2)은 복합재료의 내산화 특성을 향상시키기 위하여 각각 4, 12, 20 wt%의 중량비로 페놀수지에 함침시켰다. 본 연구에 있어서 복합재료의 부착력은 접촉각 측정에 의한 Willhelmy 방정식을 사용하여 계산하였다. 파괴인성과 충격강도는 임계 세기인자 측정을 위한 3점 굴곡 시험 방법과 Izod 충격시험에 의해 각각 측정하였다. 그 결과, MoSi2가 첨가된 탄소/탄소 복합재료의 파괴인성과 충격강도는 증가하였다. 특히 12 wt%의 MoSi2가 첨가된 복합재료가 London dispersive 요소 (W(A)(L))의 증가에 의한 가장 큰 부착력을 나타내었으며, 이는 복합재료의 각 구성요소간의 계면 결합력 증가에 따른 결과라 사료된다.

Keywords: Carbon-Carbon Composites; MoSi2; Work of Adhesion; Fracture Toughness; Impact Strength

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2001; 25(3): 435-440

    Published online May 25, 2001

  • Received on Jan 8, 2001