摘要
为了研究直流激励下Ni-Cr桥膜换能元的作用规律,采用磁控溅射法制备了一种多层复合结构的Ni-Cr桥膜换能元,并通过电压探头、光电传感器和红外热像仪获得了不同电流输入时换能元电压、光信号和表面温度随时间变化的特征曲线。结果表明:在低电流(I≤2.5A)输入下,Ni-Cr桥膜换能元的作用规律类似传统桥丝/桥带换能元的热传导作用规律;当输入电流增大至3.0A时,Ni-Cr桥膜换能元的作用规律转变为微对流作用规律;当Ni-Cr桥膜换能元并联热敏电阻后,热敏电阻的分流作用有效抑制了换能元温度的升高,提升了安全电流,但同时也抑制了桥区等离子体的形成,因而无法实现热传导向微对流作用规律的转换。
In order to investigate the behavior of Ni-Cr bridge film energy conversion element under DC excitation,a Ni-Cr bridge film energy conversion element with multilayer composite structure was fabricated using magnetron sputtering,and the characteristic curves of the energy conversion element voltage,optical signal and surface temperature under different current inputs were obtained by the voltage probe,photoelectric sensor and infrared thermal imager.The results show that the behavior of the Ni-Cr bridge film energy conversion element is similar to the heat conduction of the conventional bridge-wire or bridge-belt energy conversion element under low current input(I≤2.5 A).When the input current increases to 3.0 A,the behavior of Ni-Cr bridge film energy conversion element changes to micro-convection.While the Ni-Cr bridge film energy conversion element is connected in parallel with a thermistor,the shunting effect of the thermistor effectively inhibits the temperature rise of the energy conversion element and improves the safety current,but also suppresses the formation of plasma in the bridge region,which making it impossible to achieve the conversion of heat conduction to micro-convection.
作者
王科伟
段卜仁
姜晓斌
李彤
黄金红
关文超
WANG Ke-wei;DUAN Bu-ren;JIANG Xiao-bin;LI Tong;HUANG Jin-hong;GUAN Wen-chao(Liaoning North Huafeng Special Chemical Limited Company,Fushun,113003;Key Laboratory of Aerospace-grade Initiating Explosive Devices Liaoning Province,Fushun,113003)
出处
《火工品》
CAS
CSCD
北大核心
2023年第6期21-26,共6页
Initiators & Pyrotechnics
关键词
Ni-Cr桥膜
换能元
直流激励
热敏电阻
热传导
微对流
Ni-Cr bridge film
Energy conversion element
DC excitation
Thermistor
Heat conduction
Micro-convection
