摘要
对某品牌家用电水壶进行失效分析,发现由于使用过程中壶嘴漏水,从而引发电路短路。对壶嘴区域进行宏观检查、扫描电镜及能谱分析,结果表明,部分区域硅胶填充不均匀,导致水的渗入,加速硅胶老化失效。在使用期间,多次热循环导致硅胶不均匀处膨胀收缩量具有差异,进而产生应力,撕扯硅胶,最终导致局部漏水。最后根据失效分析结果提出了改进建议,从而提高电水壶的使用安全性。
Failure analysis for a household electric kettle of some brand with frequent short circuit was carried out.The short circuit was caused by the water from the leaking spout during use.The area around spout was analyzed by macroscopic examination,scanning electron microscope and energy dispersive spectrometry.The results show that the non-uniform filling of silica gel in part leads to the infiltration by water and accelerates the ageing of silica gel.The different expansion and contraction in the non-uniform parts of silica gel due to multiple thermal cycles in use,which leads to the stress tearing the silica gel,and ultimately leads to the local leakage.Finally,according to the results of failure analysis,some improvement suggestions are put forward to ensure the safety of consumers.
作者
李沅骏
向雄志
LI Yuanjun;XIANG Xiongzhi(Shenzhen Key Laboratory of Polymer Science and Technology,Guangdong Research Center for Interfacial Engineering of Functional Materials,College of Materials Science and Engineering,Shenzhen University Shenzhen 518060)
出处
《家电科技》
2020年第1期84-85,96,共3页
Journal of Appliance Science & Technology
基金
广东省研究生教育创新计划项目(2017QTLXXM52).
关键词
电水壶
漏水
失效分析
焊接结构
Electric kettle
Water leakage
Failure analysis
Welded structure
