Copper clad aluminum (CCA) wire is one of the promising candidate for replacing copper wire with advantages of light weight, good conductivity, and low price. In this study, the characteristics of melting in CCA wire are investigated in order to identify the difference of CCA wire which causes fire. From the experiments on 0.75sq stranded CCA wire, it is revealed that CCA wire has inferior tensile strength and high temperature during electrical flow compared to the pure copper wire. Melted CCA samples fabricated under different conditions such as overcurrent, overcurrent with external heat, and external heat without electrical current show insignificant difference in the shape and weakness of hardness at the melting region. Because the cooling time affects to the formation of nucleation, Al-Cu alloy of the CCA, which have faster cooling time than pure metal, contains dendrite structure under overcurrent condition while the void is observed only in the sample of external heat without current. Therefore, we conclude that the cause of fire due to CCA-wire is identified by the observation of dendrite structure at the melting beads.
목차
Abstract 1. 서론 1.1 연구배경 및 목적 1.2 최근 화재 사례 1.3 전기용흔의 개요 및 특성 2. 본론 2.1 실험 2.2 실험결과 2.3 조직분석 및 성분분석 3. 결론 3.1 결론 3.2 제언 참고문헌
키워드
CCA(Copper clad aluminum) wireDAS(Dendrite arm spacing) methodVoid
화재의 과학적 감식, 원인규명 및 예방을 위한 학문과 기술의 발전을 도모하고, 산, 학, 연, 정의 상호 교류를 통한 화재예방과 조사 및 감식의 전문화와 함께 소방관련 정책방향 발전에 공한하며, 회원 및 화재 관련 분야의 국.내외 인사들과의 정보 교류를 위하여 설립되었다.
간행물
간행물명
한국화재감식학회 학회지 [Magazine of Fire Investigation Socity of Korea]