面向等离子体高热负荷部件中的关键性连接技术

Key joining technique of components under high heat flux of plasma

关键词:  C/C复合材料  铜合金热沉  活性金属浇铸  钎焊  热负荷

Key words:  C/C composite  copper alloy heat sunk  active metal casting  brazing  high heat flux

摘要:

介绍一种C/C复合材料与铜合金热沉的大面积连接技术,C/C表面首先经过激光毛化处理,再经活性浇铸一薄铜层,后通过钎焊或电子束焊与CuCrZr合金实现大面积连接。数值模拟结果显示,这种连接可以稳态承受10MW/m²的热负荷长期作用;电子束模拟热负荷试验结果也显示,平护瓦型碳纤维增强复合材料连接结构在经受12MW/m²热负荷,1000次热疲劳试验后没有出现热烧伤斑点等损伤现象;Monoblock型连接结构在经受15MW/m²,300次热疲劳试验后,也没有出现明显的损伤现象。结果表明,该种连接技术完全可以满足EASr装置高热负荷部件5-8MW/m²的需要。

Abstract:

A key joining technique between C/C composite and copper alloy heat sunk was shown.Firstly,the C/C surface was treated by pluse laser to form some grooves,then a thin layer of copper was casted with active metal,finally CuCrZr alloy was attached by brazing or electron beam welding.The numerical simulating results show that this kind of joint can withstand steady state heat flux of 10 MW/m².The electron beam simulating experiments indicate that there were no hot spot and other degradation failures with 12 MW/m² during 1000 cycles thermal fatigue test on the flat carbon fibre reinforced carbon attaching structure and there were also no obvious degradation failure in monoblock attaching structure after 300 cycles thermal fatigue test with 15 MW/m².The above results show that this kind of attaching technique can meet the requirements of the EAST device with high heat flux of 5-8 MW/m².