Special Issue
  • Improvement of Impact Resistance of B4C Tile Inserted B4Cp/Al7075 Hybrid Composites Through Interface Control 
  • Jongbok Park*, Taegyu Lee*, Donghyun Lee**, Seungchan Cho**, Sang-Kwan Lee**, Soon Hyung Hong*, Ho Jin Ryu*

  • * Materials Science and Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon, Korea
    ** Composites Research Division, Korea Institute of Materials Science, Changwon, Korea

  • B4C tile 삽입 B4Cp/Al7075 하이브리드 복합재의 계면 제어를 통한 내충격 특성의 향상
  • 박종복* · 이태규* · 이동현** · 조승찬** · 이상관** · 홍순형* · 류호진*

Abstract

In this study, in order to improve the impact resistance of the B4C tile-inserted B4Cp/Al7075 hybrid composite, a control method of the B4C/Al7075 interface was developed and the characteristics of the controlled interface were analyzed. B2O3, Ni, and Si were coated on the B4C tile surface using additional thermal oxidation, electroless plating, and plasma spraying. The coated B4C tile is inserted into the B4Cp/Al7075 composite material using the liquid pressurization method. Interfacial energy, bonding strength, and impact resistance were measured to analyze the effect of the coating. All coatings enhanced interfacial energy, bonding strength, and impact resistance, and in particular, it was confirmed that the impact resistance increased by 86.8% when B2O3 coating was used. This study is significant in developing and analyzing a core surface treatment method that improves the performance of B4C/Al series composites, which are attracting attention as next-generation lightweight amour and bulletproof materials.


본 연구에서는 B4C tile 삽입 B4Cp/Al7075 하이브리드 복합재의 내충격성을 향상시키기 위하여 B4C/Al7075 계면의 제어법을 개발하고 제어된 계면의 특성에 관하여 분석하였다. 이를 위해 B4C 타일 표면에 B2O3, Ni, 그리고 Si을 각각 열산화, 무전해도금, 그리고 플라즈마 용사법을 이용하여 코팅하였다. 이후 코팅된 B4C 타일을 액상가압법을 이용하여 B4C/Al7075 복합재 내부에 삽입하여 B4C tile 삽입 B4Cp/Al7075 하이브리드 복합재를 제작하였다. 코팅의 효과를 체계적으로 분석하기 위해 계면에너지, 접합 강도, 그리고 내충격성을 측정하였다. 모든 코팅이 계면에너지, 계면강도, 내충격성을 증가시켰으며 특히 B2O3 코팅 시 내충격성이 86.8% 증가하였다. 본 연구는 차세대 경량 장갑, 방탄소재로 주목받고 있는 B4C/Al 계열 복합재의 성능을 향상시키는 핵심적인 표면처리법을 개발, 분석한 것에 의의가 있다.


Keywords: 금속복합재료(Metal matrix composite), 경사 기능(Functionally graded), 고체적율(High volume fraction), 액상가압공정(Liquid pressing process), 내충격성(Impact resistance)

This Article

Correspondence to

  • Ho Jin Ryu
  • Materials Science and Engineering Department, Korea Advanced Institute of Science and Technology, Daejeon, Korea

  • E-mail: Hojinryu@kaist.ac.kr